Index Catalog // ScholarsArchive@OSU

Numerical response of concrete-lined tunnels crossing active faults

Creator:: Lange, Stephanie
Abstract:: A challenge for municipal authorities of growing urban areas is to provide larger and faster transportation and utility networks that are safe and resilient to significant disruptions after an earthquake event and other disasters. Urban regions, like the San Francisco Bay or the Los Angeles area, are situated in seismically...
Resource Type:: Dissertation
Full Text:: Response of Concrete-Lined Tunnels Crossing Active Faults Abstract approved: Scott A. Ashford A

Finite element modeling of gusset plate failure using OpenSees

Creator:: Walker, Andrew J.
Abstract:: The collapse of the I-35W Bridge in Minneapolis, MN in 2007 prompted an investigation into the design and inspection of the steel truss bridges. Further investigation into the collapse revealed that a gusset plate experienced sway buckling, causing the bridge failure. This bridge failure motivated research into the analysis and...
Resource Type:: Masters Thesis
Full Text:: Element Modeling of Gusset Plate Failure Using Opensees Abstract approved: Michael H. Scott

Response Sensitivity Formulations for Geometrically Nonlinear Finite Element Analysis

Creator:: Al-Aukaily, Alabbas
Abstract:: Significant amounts of uncertainty owing to both modeling decisions and inherent randomness are present in simulating the material and geometric nonlinear response of structural systems to extreme loading. Computing the sensitivity of structural response with respect to model parameters indicates which parameters have the largest affect on the response, which...
Resource Type:: Dissertation
Full Text:: . Scott Significant amounts of uncertainty owing to both modeling decisions and inher- ent randomness

Bridge Model Parameter Sensitivity in Pushover and Nonlinear Time History Analysis

Creator:: Johnsohn, Karryn E.
Abstract:: The aim of this research is to understand and quantify the modeling differences between CSiBridge and OpenSees, and to determine sensitive model parameters. When designing bridges for the high seismic region of California, the California Department of Transportation (Caltrans) performs nonlinear time history analysis of their bridge models. For three-dimensional...
Resource Type:: Masters Thesis
Full Text:: Parameter Sensitivity in Pushover and Nonlinear Time History Analysis Abstract approved: Michael H. Scott

Effects of soil slope on lateral capacity of piles in cohesive soils

Creator:: Nimityongskul, Nontapat
Abstract:: Pile supported bridges are typically constructed near or in a natural or man-made slope and are subjected to lateral loading. The current design method for laterally loaded piles involves the use of Winkler's spring concept with the standard nonlinear p-y curves. The available p-y curves were developed based on results...
Resource Type:: Dissertation
Full Text:: : _____________________________________________________________________ Scott A. Ashford Pile supported bridges are typically constructed near or in a natural or

Effects of soil slope on the lateral capacity of piles in cohesionless soils

Creator:: Barker, Paul D.
Abstract:: Deep foundations, including driven piles, are used to support vertical loads of structures and applied lateral forces. Many pile supported structures, including bridges, are subjected to large lateral loads in the form of wind, wave, seismic, and traffic impact loads. In many practical situations, structures subjected to lateral loading are...
Resource Type:: Masters Thesis
Full Text:: Soils. Abstract approved: Scott A. Ashford Deep foundations, including driven piles

Seismic performance of a pile-supported container wharf structures in rockfill

Creator:: Kawamata, Yohsuke
Abstract:: Recently, the concept of performance based design has become popular for many types of structures, including port facilities under seismic loading. For the case of pile-supported wharves, the level of performance is generally estimated using the displacement capacity of the structure. Therefore, understanding soil-pile interaction is one of the most...
Resource Type:: Dissertation
Full Text:: Pile-supported Container Wharf Structures in Rockfill Abstract approved: Scott A. Ashford

Three-dimensional experiments and modeling of anisotropic clay

Creator:: Anantanasakul, Pongpipat
Abstract:: This dissertation presents the results of a research effort conducted to better understand the stress-strain, volume change, shear band formation, and strength characteristics of normally consolidated anisotropic clay under fully three-dimensional stress states. A series of consolidated drained true triaxial tests with a constant mean effective stress and constant Lode...
Resource Type:: Dissertation
Full Text:: : Three-Dimensional Experiments and Modeling of Anisotropic Clay Abstract approved: Scott A. Ashford

Shear reinforcement effects of discrete columns in liquefiable soils

Creator:: Rayamajhi, Deepak
Abstract:: Discrete columns, such as stone and soil-cement columns, are often used to improve the liquefaction resistance of loose sandy ground. In particular, stone columns are considered to increase resistance potential by densification, drainage, and reinforcement mechanisms. For silty soil, the shear stress reduction resulting from the reinforcing effect of stiffer...
Resource Type:: Dissertation
Full Text:: Discrete Columns in Liquefiable Soils. Abstract approved: Scott A. Ashford Discrete columns, such as

Fluid-structure interaction analysis with the particle finite element method

Creator:: Zhu, Minjie
Abstract:: To facilitate the evaluation and design of structures subjected to fluid loading, a study of fluid-structure interaction (FSI) using the particle finite element method (PFEM) is presented to approximate the responses and sensitivities of structures which interact with fluid. A wide range of structural types are permissible by making no...
Resource Type:: Dissertation
Full Text:: analysis with the particle finite element method Abstract approved: Michael H. Scott To facilitate

Predicting pore pressure response in in-situ liquefaction studies using controlled blasting

Creator:: Eller, James Michael
Abstract:: Originally used as a method to densify loose soils, controlled blasting has expanded its applicability to geotechnical engineering by becoming a research tool to physically generate liquefaction for full-scale in-situ tests, ranging from seismic performance of deep foundations to evaluating ground improvement techniques. Current methods used to design the blasting...
Resource Type:: Masters Thesis
Full Text:: : __________________________________________________________________________ Scott A. Ashford Originally used as a method to densify loose soils, controlled blasting

Parametric uncertainties in reliability analysis of bridge structures

Creator:: Hamutcuoglu, Osman Murat
Abstract:: Probability-based reliability methods have placed an increased emphasis on realistic simulation of structural behavior in bridge engineering. Uncertainty is present in every aspect of structural analysis. Aleatory uncertainties in the loading and load-carrying capacities, and epistemic uncertainties in mathematical idealization of bridge systems are the major contributors to uncertain structural...
Resource Type:: Dissertation
Full Text:: Uncertainties in Reliability Analysis of Bridge Structures Abstract approved: Michael H. Scott Probability

3-D finite element modeling in OpenSees for bridge live-load girder distribution factors

Creator:: Scoggins, Luke A.
Abstract:: A generalized, three-dimensional, finite element bridge model was created in order to efficiently and accurately assess live-load girder distribution factors for a variety of bridge types. This model shortens the time required by bridge analysts to develop individual finite element models for bridges of varying geometries. The creation of the...
Resource Type:: Masters Thesis
Full Text:: Factors. Abstract approved: Michael H. Scott A generalized, three-dimensional, finite

Tsunami Simulation Using OpenSees : Validation of Bridge Response and Exploration of Shallow Water Flow

Creator:: Cressman, Luke R.
Abstract:: The finite element software framework, OpenSees, has been used by researchers to simulate the response of structural and geotechnical systems to earthquake loading. Implementation of the Particle Finite Element Method (PFEM) has made it possible to simulate hydrodynamic forces through fluid-structure interaction (FSI) in OpenSees. To validate the FSI implementation...
Resource Type:: Masters Thesis
Full Text:: : Michael H. Scott The finite element software framework, OpenSees, has been used by researchers to

Analysis of moving loads using force-based finite elements

Creator:: Kidarsa, Adrian
Abstract:: An analysis method for moving loads computes the internal demand history in a structural member at integration points of force-based finite elements as opposed to the end forces of a refined displacement-based finite element mesh. The force-based formulation satisfies strong equilibrium of internal section forces with the element end forces...
Resource Type:: Masters Thesis
Full Text:: : Analysis of Moving Loads Using Force-Based Finite Elements. Abstract approved: Michael H. Scott An

Influence of silt size and content on static liquefaction potential of sand

Creator:: Monkul, M. Murat
Abstract:: Different specimen preparation methods such as moist tamping, dry funnel deposition, slurry deposition, dry air pluviation have been reported in the literature to investigate the undrained behavior of silty sands. Similarly, different means have been used to densify the soils prepared with such methods. However, the influence of the densification...
Resource Type:: Dissertation
Full Text:: Content on Static Liquefaction Potential of Sand. Abstract approved: Scott A

Tsunami Loading on Coastal Infrastructure

Creator:: Xie, Zhongliang
Abstract:: The safety of coastal infrastructure has been a concern after the Indian Ocean Tsunami in 2004 and the Great East Japan Tsunami in 2011. The western coast of the United States is also exposed to tsunami hazards due to the Cascadia subduction zone. Therefore, it is critical to design coastal...
Resource Type:: Dissertation
Full Text:: Coastal Infrastructure Abstract approved: Michael H. Scott The safety of coastal infrastructure has

Use of benthic sediments as indicators of marina flushing

Creator:: Noble, Scott Morgan
Abstract:: This report presents the findings of a sediment analysis program formulated to determine the flushing potential of various shaped small boat marina basins. Chemical tests regarding volatile solids, Kjeldahl nitrogen, grease and oil, and sulfides were performed with the results compared to established sediment quality criteria. These results were used...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF MASTER OF SCOTT MORGAN NOBLE

Computerized safety analysis technique for secondary highways

Creator:: Nichols, Kevin Scott
Abstract:: Evaluation of the safety hazards along a highway is usually performed at specific locations and on known hazards. But, it is also important to find any unrecognized hazards and their locations. Many factors contribute to accident potential, and the combined effect of several of them could produce a hazard that...
Resource Type:: Masters Thesis
Full Text:: highways AN ABSTRAC 7 OF THE THESIS OF Kevin Scott Nichols for the degree of Master of Science in

Optimizing the performance of gypsum wall board in wood frame shear walls

Creator:: Goodall, Scott I.
Abstract:: The overall goal of this project was to design a wood frame shear wall that could withstand greater displacement before damage occurred to the Gypsum Wall Board (GWB). More specifically, the objectives of the study were: (1) to evaluate damage to the GWB in alternative shear wall designs at 1%,...
Resource Type:: Masters Thesis
Full Text:: 1 AN ABSTRACT OF THE THESIS OF Scott I. Goodall for

Blast-induced liquefaction : observational estimation of vibration, settlement and residual pore water pressure

Creator:: Kato, Kengo
Abstract:: The blast technique has been used as an effective soil improvement method to compact loose coarse-granular soils since 1930s, and the use of the blast technique is extended as an application of in-situ liquefaction testing to investigate the performance of full scale foundations and countermeasures against liquefaction in recent decades....
Resource Type:: Dissertation
Full Text:: : _____________________________________________________________________ Scott A. Ashford and H. Benjamin Mason The blast technique has been used as an

Investigation of the behavior of diagonally cracked full-scale CRC deck-girders injected with epoxy resin and subjected to axial tension

Creator:: Smith, Matthew T. (Matthew Todd)
Abstract:: Article 1: Behavior of Epoxy Injected Diagonally Cracked Full-Scale CRC Deck-Girders. Many cast-in place reinforced concrete deck-girder bridges (RCDG) remain in the national inventory and exhibit diagonal cracking. Epoxy injection has been in use for several decades as a method for sealing diagonal cracks, but the effects on girder behavior...
Resource Type:: Masters Thesis
Full Text:: Concrete Beams,” Oregon Department of Transportation, Salem, OR, 2003, 19 pp. Popov, E. P., and

Assessing the Impact of Three Intersection Treatments on Bicyclist Safety

Creator:: Scott-Deeter, Logan K..
Abstract:: Bicyclist safety at urban intersections is a critical element for encouraging an increase in bicycle commuting. With bicycle injury and fatality rates rising due to collisions with vehicles at signalized intersections, increasing the safety of riders continues to be an important consideration when promoting this mode of transportation. Previous research...
Resource Type:: Masters Thesis
Full Text:: Microsoft Word - Logan Scott-Deeter_Thesis v2.docx AN

Post-Earthquake Performance Assessment of Steel Strongback Braced Frames

Creator:: Rhoades, Katharine
Abstract:: Traditional braced frames are an efficient and economic means of resisting seismic demands. However, braced frames are prone to story mechanisms, which can result in concentrations of demands and damage during seismic events. Including steel strongbacks in conjunction with traditional braced frames can mitigate story mechanisms. The SBF results in...
Resource Type:: Honors College Thesis
Full Text:: _____________________________________________________________________ Michael Scott Committee Member, representing Civil Engineering

Applications of Marine Radar Wave Observation Systems

Creator:: Meskill, Shay J.
Abstract:: This project utilized both shore-based and shipboard commercial marine radar technology to collect wave statistics. In the first application a shore-based system was installed at Yaquina Bay in Newport, Oregon in order to collect real-time wave information. This information was collected under the auspices of the Northwest Association of Networked...
Resource Type:: Capstone Project
Full Text:: Scott A. Ashford, Head of School of Civil and Construction Engineering I understand that

Improving Braced Frame Modeling Application

Creator:: Groshong, Corey
Abstract:: This work analyzes the numerical curvature of buckling braces. An existing brace modeling learning tool, which in its current state allows users to change the inputs within a simulated model of a braced element, was modified to display the curvature diagram. The curvature diagram was verified through comparison to existing...
Resource Type:: Honors College Thesis
Full Text:: _____________________________________________________________________ Michael Scott, Committee Member, representing Civil & Construction Engineering

The influence of the level of illumination on the effectiveness of highway signs

Creator:: Ozols, Vitauts
Resource Type:: Masters Thesis
Full Text:: criticism, I am indebted to Professor Martin P Coopey. I am indebted to Professor Glenn W. Holcomb for

Effect of subduction zone earthquakes on SDOF bridge models

Creator:: Long, Yicheng
Abstract:: Current bridge design codes do not account for the effects of duration of mega-thrust subduction zone earthquakes. Furthermore, codes and even recent performance-based design methodologies only make use of the peak response quantities (forces, displacements, and ductility demands) and do not account for the increased number of inelastic cycles that...
Resource Type:: Masters Thesis
Full Text:: are studied. Effects of P-Delta are also investigated. Four measures of seismic demand are assumed

Multi-hazard framework and analysis of soil-bridge systems : long duration earthquake and tsunami loading

Creator:: Carey, Trevor J.
Abstract:: During the 2011 Great East Japan Earthquake and Tsunami, numerous bridge structures were damage or destroyed. The damage to bridge systems was caused by long duration strong ground shaking, tsunami inundation forces, or both. Long duration strong ground shaking from subduction zone earthquakes and the multi-hazard scenario of combined earthquake...
Resource Type:: Masters Thesis
Full Text:: Element Method (PFEM) was used to simulate impact of an idealized tsunami bore and the FEMA P-646 method

Flexural steel anchorage performance at diagonal crack locations

Creator:: Triska, Mary Ann
Abstract:: Large numbers of reinforced concrete deck girder bridges that were constructed during the interstate system expansion of the 1950s have developed diagonal cracking in the stems. Compared to the present AASHTO-LRFD standards, the provisions of the 1950s allowed for higher shear stress in the concrete, thus reducing the amount of...
Resource Type:: Masters Thesis
Full Text:: committee members: Dr. Michael Scott, Dr. Tonatiuh Rodriguez-Nikl, and Dr. Timothy Kennedy. The

Influence of diagonal cracks on negative moment flexural anchorage performance in reinforced concrete bridge girders

Creator:: Goodall, Joshua K.
Abstract:: Large numbers of vintage reinforced concrete deck-girder bridges remain in the national bridge inventory. Many of these exhibit diagonal cracking and other distress. Due to the design practices of the time, it is common to observe cracks at locations where flexural reinforcing steel is terminated along the span. The presence...
Resource Type:: Masters Thesis
Full Text:: help in every facet of the research process. Undergraduates Eric Goodall, Anthony Peressini, Scott

Experimental research on the behavior and strength of large-scale steel gusset plates with sway-buckling response including effects of corrosion and retrofit options

Creator:: Hafner, Anthony G.
Abstract:: The collapse of the I-35W Bridge in Minneapolis, MN on August 1, 2007 brought into question the design and inspection of gusset plates in steel truss bridges. The experimental tests performed in this research study the sway-buckling strength and behavior of large-scale steel gusset plates in an isolated truss connection....
Resource Type:: Masters Thesis

Behavior of open grid steel bridge decks under service and fatigue loads

Creator:: Fetzer, Peter C.
Abstract:: Open grid steel bridge decks have been in use for nearly a century. These open grid decks provide an economical and lightweight alternative to traditional reinforced concrete decks. As the transportation infrastructure continues to deteriorate, open grid decks can be used as a cost effective way to rehabilitate structurally deficient...
Resource Type:: Masters Thesis
Full Text:: committee members Dr. Michael Scott, Dr. John Gambatese, and Dr. Andrew Meigs. I would also like to thank

Numerical assessment of steel plate shear wall with coupling (SPSW-WC) system design procedure

Creator:: Li, Wennan
Abstract:: The Steel Plate Shear Wall (SPSW) system, is an innovative seismic lateral force resistant system, which has experienced increased use over the last three decades. The SPSW system is composed of boundary elements which anchor web plates that develop diagonal tension fields. A number of SPSW buildings have been built...
Resource Type:: Masters Thesis
Full Text:: . Andre R. Barbosa and Dr. Michael H. Scott. As the experts in civil engineering, their knowledge and

Autogenous deformation and chemical shrinkage of high performance cementitious systems

Creator:: Fu, Tengfei
Abstract:: In the past ten years, renewed research interest has shown the benefits of internal curing by incorporating saturated lightweight fine aggregate (LWFA) in high performance concrete (HPC). As a result, the technology of internal curing has steadily progressed from laboratory studies to field applications. To determine the optimum LWFA content,...
Resource Type:: Masters Thesis
Full Text:: . I also would like to thank Dr. David Trejo, Dr. Michael H. Scott and Dr. Lech Muszyński for their

Testing and Modeling of a Cross-Laminated Timber Pier-and-Spandrel Seismic Retrofit Solution for Unreinforced Masonry Buildings

Creator:: Engleson, Renee M.
Abstract:: Cross-laminated timber (CLT) is an attractive building material because it is renewable, promotes fast installation, and possesses a high strength-to-weight ratio. The use of CLT in seismic applications has become increasingly common with the development of post-tensioned CLT rocking wall lateral force resisting systems (LFRS). The CLT pier-and-spandrel system designed,...
Resource Type:: Masters Thesis
Full Text:: Miller and Dr. Michael Scott for serving on my graduate committee and for their mentorship throughout

Optimization of Construction Equipment Efficiency and Cost using Simulation and Field Data

Creator:: Kumar, Deepak
Abstract:: Unlike other industries, overall efficiency of construction projects has been growing minimally which directly causes cost overruns of projects. Though reducing idle time and increasing operational efficiency of construction equipment could result in significant cost saving, there is lack of practical knowledge of adjusting operational efficiency and integrating cost and...
Resource Type:: Masters Thesis
Full Text:: . Michael Scott and Dr. Guillaume Mignot for being my committee member and supportive and encouragement in

Large–Scale Laboratory Experiment and Numerical Simulation of Tsunami Forces on a Bridge Deck

Creator:: Xiang, Tao
Abstract:: The fluid impact forces on a bridge superstructure in horizontal and vertical directions due to tsunamis represented by solitary waves are investigated through a large-scale laboratory experiment and numerical simulations. The experiment is conducted in a two-dimensional wave basin using a 1:5 scaled reinforced concrete bridge deck model tested under...
Resource Type:: Masters Thesis
Full Text:: work. I would like to thank my committee members, Dr. Michael Scott, Dr. Pedro Lomónaco and Dr. Yue

Bridge Damage State Detection Based on Strain-Based Wireless Structural Health Monitoring

Creator:: Slaven, Kelli R.
Abstract:: The Pacific Northwest is at risk for significant seismic and tsunami events, which are capable of severely damaging lifeline transportation infrastructure, particularly bridges. As the bridges in the United States age and begin to show signs of fatigue, the risk for severe damage increases. Proper monitoring and inspection of bridges...
Resource Type:: Masters Thesis
Full Text:: (Scott et al 2008). The string based Tool Command Language (Tcl) is used to build models and run

Numerical Characterization and Modeling Uncertainty of Frame-Spine and Frame-Spine-FLC Full-Scale Specimens Tested at E-Defense Shake-Table

Creator:: Astudillo, Bryam
Abstract:: The characterization of the seismic performance of structures relies on numerical simulations. However, estimates of seismic response are subject to various sources of uncertainty, including modeling uncertainty. This research estimated the response of two full-scale structural specimens composed of a moment resisting frame, elastic spines, and force-limiting connections (FLC), which...
Resource Type:: Masters Thesis
Full Text:: Professors Dr. Andre Barbosa and Dr. Michael Scott for being part of my committee and for their knowledge

Development of rapid visual screening tool for seismic evaluation of wood-frame dwellings

Creator:: Lucksiri, Kraisorn
Abstract:: During the past several decades, earthquakes have caused extensive damage to buildings, including wood-frame, single-family dwellings, in the United States. In order to mitigate future losses, existing buildings in earthquake prone areas should be evaluated for their seismic safety. This is also an important issue for buildings in Oregon due...
Resource Type:: Dissertation
Full Text:: Lachenbruch, Dr. Michael Scott, and Dr. Kate Lajtha for serving as my dissertation committee members. Their

Fluid Structure Interaction for Cascading Seismic and Tsunami Events using Real-Time Hybrid Simulation

Creator:: Neumann, Christopher R.
Abstract:: While real-time hybrid simulation has been utilized for structures subjected to seismic events for decades, its use in fluid-structure interaction problems is still a novel endeavor. Gathering data for cascading seismic and tsunami events is difficult due to space constraints in existing experimental facilities, complications regarding the application of scaling...
Resource Type:: Masters Thesis
Full Text:: Scott, for their help with the project and willingness to serve as members of my graduate committee

Seismic performance of diagrid steel structures using single and double friction mass dampers

Creator:: Ramadhan, Garlan
Abstract:: The steel diagrid structural system is a recent load bearing and lateral resisting structural system for tall building structures that is relatively unexplored in the western United States. One possible reason for the little use of diagrid systems in earthquake prone regions is the lack of guidelines and application examples...
Resource Type:: Masters Thesis
Full Text:: , respectively. Illustration of this model is shown in Figure 2.1. The axial force (𝑃) of the friction

Practical Design Considerations for Steel Slit Panel Frames

Creator:: Parikh, Madhav
Abstract:: Steel Slit Panel Frames (SSPFs) are an innovative and resilient lateral force resisting system. Steel Slit Panels (SSPs) are bolted to the beams and act as replaceable seismic fuses, dissipating energy through flexural yielding in links between vertical rows of slits. SSPFs have shown promise as a lateral force resisting...
Resource Type:: Masters Thesis
Full Text:: models has been instrumental to this project. I am very thankful to Dr. Michael Scott for sharing his

Alkali-silica reaction in concrete containing recycled concrete aggregates

Creator:: Adams, Matthew P.
Abstract:: Using recycled concrete aggregate (RCA) as a replacement for natural aggregate in new concrete is a promising way to increase the overall sustainability of new concrete. This has been hindered, however, by a general perception that RCA is a sub-standard material due to the lack of technical guidance, specifically related...
Resource Type:: Masters Thesis
Full Text:: ABSTRACT OF THE THESIS OF Matthew P. Adams for the degree of Master of Science in Civil Engineering

Evaluation of Cycling Behavior: Factors that Influence Bicyclists’ Comprehension, Comfort, and Stress

Creator:: Cobb, Douglas P.
Abstract:: Travel demand has increased due to population growth, increase of vehicle ownership, and development patterns resulting in greater levels of congestion, pollution, and crash frequency. One approach to demand management is to increase the share of trips made by bicycles. With the increase in bicycling rates, there is a critical...
Resource Type:: Dissertation

Coastal Soil and Structure Behavior during Earthquake-Tsunami Multi-Hazards

Creator:: Qiu, Yingqing
Abstract:: Coastal multi-hazards, i.e., earthquakes followed by tsunamis, induce severe damage to coastal infrastructure. The multi-hazards can cause soil liquefaction, which is one of the major concerns for evaluating sediments transport potential and structure failure mechanisms. The objectives for this work is threefold. First, to build and validate a soil numerical...
Resource Type:: Dissertation
Full Text:: conductivity is the most sensi- tive and uncertain parameter in the u − p form of Biot’s equation — a well

Design and environmental performance of near-surface mounted carbon fiber reinforced polymer strips for shear strengthening reinforced concrete bridge girders

Creator:: Goebel, Jacob Hans
Abstract:: During the interstate expansion of the 1950s, many conventionally reinforced concrete deck girder bridges were built throughout the country. These now vintage bridges commonly exhibit diagonal cracking and rate inadequately for shear, thus they are candidates for shear strengthening to extend their useful life. Near-surface mounted (NSM) retrofitting is a...
Resource Type:: Masters Thesis
Full Text:: Schumacher, Jora Lehrman, Josh Goodall, Scott Mersereau, Brandon Mahon, Anthony Peressini, Nick Atanasov

Adjacent structure response sensitivity to seismic events using the direct differentiation method

Creator:: White, William S.
Abstract:: The response of adjacent structural systems to earthquake motions is investigated using the finite element framework OpenSees. Results of sensitivity analyses demonstrate that structural response quantities can increase in either or both of the adjacent structures for specific configurations. The structural models used include steel moment-resisting frames and rigid shear...
Resource Type:: Masters Thesis
Full Text:: Mason and my unofficial co-advisor, Dr. Michael Scott. The understanding and guidance of Dr. Mason were

Numerical modeling of full-coupled fluid-structure interaction

Creator:: Yuk, Dongjun
Abstract:: A numerical model for the simulation of fully-coupled fluid-structure interaction is developed in this study. In modeling the fluid, the Reynolds Averaged Navier-Stokes equations are solved for an incompressible viscous fluid field and a k-ε model is employed for turbulence computations. Hydrodynamic forces obtained by the integration of the fluid...
Resource Type:: Dissertation
Full Text:: . Robert L. Higdon, Dr. Jack F. Higginbotham, Dr. Michael H. Scott for their time and effort spent

Advancements Toward the Simulation of Steel Structures in Fire Using OpenSees

Creator:: Gordon, James A.
Abstract:: Since the collapse of World Trade Center building number seven (WTC7), significant research has been done to understand the behavior of steel structures in fire and enable engineers to account for the behavior of steel framing systems exposed to fire during design. Despite these efforts, there are still significant barriers...
Resource Type:: Masters Thesis
Full Text:: impacts in my life which I will always be grateful for. I would like to thank Dr. Michael Scott and

Evaluation of ground motion duration effects on the damage prediction of building and bridge structural and soil-structural systems

Creator:: Belejo, Andre
Abstract:: The role of ground motion duration on the seismic performance of civil engineering structures remains unclear. Thus, the role of earthquake strong ground motion duration is assessed in a three manuscript thesis, which includes: (1) assessment of the effects of ground motion duration on the seismic performance of a model...
Resource Type:: Dissertation
Full Text:: Stuedlein, Dr. Michael Scott, Dr. Thomas Miller, Dr. Yue Zhang and Dr. Julie Taylor for their kindness and

A numerical wave tank based on coupled potential flow-viscous flow model

Creator:: Zhang, Yi
Abstract:: In this study, a coupled potential flow-viscous flow model is used for numerical wave tank simulation. The solver satisfies all the requirements for such a simulation environment. The coupling scheme is based on a non-overlapping heterogeneous domain decomposition method. In this method, the flow domain consists of two subdomains. In...
Resource Type:: Dissertation
Full Text:: ρ ∂u ∂t + ρu · ∇u = −∇p+ µ∇2u+ f , ∀(x, t) ∈ Ω1 × [0, T ], (2.1a) ∇ · u = 0, ∀(x, t) ∈ Ω1 × [0, T

Probabilistic Tsunami Hazard and Damage Assessment of the Built Environment : Applied at Seaside, Oregon

Creator:: Park, Hyoungsu
Abstract:: Damage estimates to the built environment from tsunamis are important for disaster mitigation, including planning emergency response and recovery. This dissertation evaluates the damage states of buildings in a small urban coastal city, Seaside, Oregon, from tsunami hazards generated by a Cascadia Subduction Zone (CSZ) event. This study is separated...
Resource Type:: Dissertation
Full Text:: Barbosa, Dr. David Hill, Dr. Michael Scott, and Dr. Anne Trehu for their insightful comments and

Wind induced torsional fatigue behavior of truss bridge verticals

Creator:: Keller, Philipp
Abstract:: The Astoria-Megler Bridge is a 6.6 kilometer (4.1 mile) long bridge, connecting Oregon and Washington on US 101, with a continuous steel truss main span of 376 m (1232 ft). It is the second longest main span bridge of this type in the world. Due to vortex shedding, some of...
Resource Type:: Masters Thesis
Full Text:: , Dr. Thomas Miller, Dr. Michael Scott and Dr. Andrew Meigs, for their thoughtful questions, comments

Hydrodynamic contact/impact modeling and application to ocean engineering problems

Creator:: Challa, Ravi
Abstract:: Fluid-structure interaction (FSI) is a very interesting and challenging multi-disciplinary field involving interaction of a movable or deformable structure with an internal or surrounding fluid flow. FSI has several practical engineering applications such as the determination of the hydrodynamic forces on a structure or the dynamics of motion of bodies...
Resource Type:: Dissertation
Full Text:: . Harry Yeh, Prof. Michael Scott and Prof. William McDougal for their inputs, advice and suggestions

Elevated Temperature Effects on the Shear Performance of a Cross-Laminated Timber (CLT) Wall-to-Floor Bracket Connection

Creator:: Mahr, Kolton J.
Abstract:: Connections in mass timber structural systems dissipate energy and transfer lateral forces from mass timber elements such as shear walls and diaphragms, providing critical load paths. Cross-laminated timber (CLT) is a prominent mass timber material used to manufacture wall and floor assemblies. Fire performance research of CLT walls and floors...
Resource Type:: Masters Thesis
Full Text:: shear walls using the FEMA P-695 (2009) methodology. When completed, the SPFs will be available for

Shear repair methods for conventionally reinforced concrete girders and deep beams

Creator:: Howell, Daniel A.
Abstract:: Many conventionally reinforced concrete deck girder bridges (RCDG) and their intermediate supporting bent caps were designed during the Eisenhower interstate era of the 1950’s with the AASHO design equations at the time, which subsequently place higher demand on the concrete. The referenced components may exhibit diagonal cracking due to the...
Resource Type:: Dissertation

Design, analysis and evaluation of bridge superstructures for live loads

Creator:: Turan, O. Tugrul
Abstract:: Due to age, original design that is deficient by modern standards, inadequate maintenance, environmental conditions, and increasing loads, large numbers of bridges in United States and elsewhere are classified as deficient and in need of rehabilitation or replacement. According to a national bridge inventory established by the Federal Highway Administration,...
Resource Type:: Dissertation
Full Text:: Kennedy, Dr. Michael Scott, and Dr. Donald C. Solmon for their helpful comments and feedback. I

Assessing the seismic performance of corroding RC bridge columns

Creator:: Guo, Yisen
Abstract:: Corrosion of reinforcement is recognized as the predominant factor that limits the service life of reinforced concrete (RC) structures exposed to aggressive environments. This corrosion deterioration can lead to damage resulting in capacity loss or even failure. For structures exposed to coastal marine environments or deicing or anti-icing applications, this...
Resource Type:: Masters Thesis
Full Text:: committee members Dr. Michael H. Scott, Dr. Solomon C. Yim, and Dr. Lech Muszynski for their helpful

Examination of lateral stiffness and strength of pitched residential roof diaphragms with implications for seismic design.

Creator:: Kirkham, William J.
Abstract:: There are about 80 million single-family dwellings (SFD) in the United States, predominantly of wood-frame construction. Of these, 68% are owner occupied. A home is typically the largest single investment of a family, and is often not covered by earthquake insurance, even where it is available. Of all SFD in...
Resource Type:: Dissertation

Experimental and analytical investigation of ponding load effects on a steel joist roof system

Creator:: Stark, Duncan
Abstract:: Ponding of water on roof systems leading to collapse causes expensive damage and jeopardizes the life safety of building occupants. Current building codes and design specifications for flat roof systems offer minimal guidance in designing for ponding loads. The present research investigated ponding load effects on a long span, lightweight...
Resource Type:: Masters Thesis
Full Text:: . Thanks also to Dr. Miller and Dr. Scott for their help with the project, and to all the professors I

Coupled Eulerian-Lagrangian Finite Element Modeling Approach Applied to Wave Structure Interaction: Effects of Shielding, Channeling, and Wall Removal

Creator:: Al-Sayhood, Zeyad A.
Abstract:: The impact of tsunamis on coastal structures gained great a new impetus following the 2004 Indian Ocean Tsunami and the 2011 Tohoku earthquake and tsunami. While several experimental programs have been performed to gain a fundamental understanding, numerical models are needed to study additional features that cannot all be tested...
Resource Type:: Dissertation
Full Text:: . I would like to thank Dr. Dan Cox, Dr. Michael H. Scott, Dr. Judy Liu, and Dr. Edward Dever for

An efficient high-performance computing based three-dimensional numerical wave basin model for the design of fluid-structure interaction experiments

Creator:: Nimmala, Seshu B.
Abstract:: Fluid-structure interaction (FSI) is an interesting and challenging interdisciplinary area comprised of fields such as engineering- fluids/structures/solids, computational science, and mathematics. FSI has several practical engineering applications such as the design of coastal infrastructure (such as bridges, levees) subjected to harsh environments from natural forces such as tsunamis, storm surges,...
Resource Type:: Dissertation

Experimental and Analytical Studies of Large-Scale Pile Caps

Creator:: Al-Sakin, Yasmeen
Abstract:: Pile caps are structural elements used to transfer loads from columns to a group of piles, which transfer them to stronger soil layers. Pile cap with horizontal distance between the column and piles less than twice its effective depth is categorized as "deep," where significant nonlinear strain distribution occurs through...
Resource Type:: Dissertation
Full Text:: . Erica Fischer, Dr. Judy Liu, and Dr. Michael Scott. My gratitude to the Higher Committee for

Structural Response of High-Performance Fiber-Reinforced Cementitious Composites: Evaluation, Simulation, and Sensitivity Analysis

Creator:: Khlef, Feras L.
Abstract:: The constitutive behavior of high-performance fiber-reinforced cementitious composites (HPFRCCs) under mechanical loading is characterized by significant tensile properties that play an essential role in the structural response of several applications in structural engineering. The significance of tensile properties of HPFRCCs in structural engineering is the focus of three manuscripts presented...
Resource Type:: Dissertation

Freeze-thaw durability of reinforced concrete deck girders strengthened for shear with surface-bonded carbon fiber-reinforced polymer

Creator:: Mitchell, Mikal Maxwell
Abstract:: Long-term durability of surface-bonded carbon fiber-reinforced polymer (CFRP) U-wraps for shear strengthening of reinforced concrete (RC) bridge members remains uncertain due to the limited field experience with these materials. This paper provides experimental results from the testing of full-scale RC bridge girder specimens after exposure to prolonged freeze-thaw cycling. CFRP...
Resource Type:: Masters Thesis

Finite Element Modeling Strategies for Seismic Collapse Assessment of Non-planar Slender Reinforced Concrete Structural Wall Resisting Systems

Creator:: Mohammed, Mohammed A.
Abstract:: For mid-rise and high rise buildings, slender reinforced concrete (RC) structural walls are commonly used as the main structural elements to resist lateral applied loads in high seismically areas around the globe. These RC structural walls can provide substantial deformation capacity, stiffness, and lateral strength through the contribution of their...
Resource Type:: Dissertation
Full Text:: contribution, this research would not have been possible. I would like to thank Dr. Michael H. Scott, Dr

Image rectification tool for evaluation of gusset plate connections in steel truss bridges

Creator:: Nguyen, Quang D.
Abstract:: A methodology was developed to permit rectification and metrification of digital images of steel truss gusset plate connections. The approach will enable rapid and accurate collection of field measurements as compared to traditional methods to enable structural evaluation of gusset plate connections. The program enables the operator to quickly create...
Resource Type:: Masters Thesis
Full Text:: . Page 43 8 References Arias, P.; Ordóñez, C.; Lorenzo, H.; Herraez, J.; Armesto J.; “Low

Numerical Analysis of a Spine as a Retrofit of a Moment-Resisting Frame

Creator:: Rivera Torres, David M.
Abstract:: Steel moment-resisting frames (MRFs) are widely used in the United States to resist seismic forces. MRFs have many advantages, including architectural versatility, vetted member and connection detailing requirements, and high ductility for special MRFs (SMRF). However, MRFs require large members to meet story drift criteria. Moreover, strong-column-weak-beam requirements can result...
Resource Type:: Masters Thesis
Full Text:: moment, 𝑀𝑏 𝑝 , the force resultant that occurs at a lower height, results in an increased base

Scale effects on reinforced concrete beams strengthened for shear with discrete externally bonded carbon fiber-reinforced polymer U-wraps

Creator:: Dawson, Matthew Ryan
Abstract:: Current ACI design provisions for shear in reinforced concrete (RC) beams strengthened with externally bonded carbon fiber-reinforced polymer (CFRP) U-wraps may not adequately account for the effect of scale. This paper describes tests of 6 geometrically scaled beams to identify possible scale effects of such beams. Results indicated that effective...
Resource Type:: Masters Thesis

Soil-bridge interaction during long-duration earthquake motions

Creator:: Romney, Kyle T.
Abstract:: Earthquake engineering analyses are often performed using shallow, crustal earthquake motions (e.g., 1940 El Centro). However, large areas of the world are subject to subduction zone earthquake motions (e.g., the Pacific Northwest). A subduction zone earthquake motion is characterized by its long duration (e.g., strong shaking lasts for more than...
Resource Type:: Masters Thesis
Full Text:: × 20 m 2-D, plane strain, uniform soil mesh modeled using multiple 9-4 quadrilateral u-p elements

Probabilistic Multi-hazard Earthquake-Tsunami Structural Risk Assessment Framework

Creator:: Alam, Mohammad Shafiqual
Abstract:: Catastrophic earthquake and tsunami events that resulted in significant loss of life and property over the past two decades have raised the global awareness regarding the need to understand the response of communities and their built environment to multi-hazard extreme events. In recognition to this impending threat to the coastal...
Resource Type:: Dissertation
Full Text:: of the doctoral committee, Dr. Michael Scott, Dr. Solomon Yim, Dr. Daniel T. Cox, Dr. Debashis

New acoustic emission applications in civil engineering

Creator:: Schumacher, Thomas
Abstract:: Non-destructive testing methods and applications have become of increasing interest due to the worldwide aging and deteriorating infrastructure network. In the field of Civil Engineering, bridges and bridge components as well as non-structural elements such as roadway pavements for example, are affected. In particular, the Acoustic Emission (AE) technique offers...
Resource Type:: Dissertation
Full Text:: , Dr. Michael Scott, Dr. Daniel Cox, and Dr. Philip Humphrey served in my PhD committee and their

Experimental and analytical evaluation of conventionally reinforced deck-girder bridge bent caps with vintage details

Creator:: Senturk, Ahmet Ekin
Abstract:: Many conventionally reinforced concrete deck girder (RCDG) bridges were built in the US during the 1950s, throughout the expansion of the Interstate System. Designs followed the AASHO standard of the time, which permitted higher shear stress in concrete and reduced detailing requirements than permitted by current specifications. Many of these...
Resource Type:: Dissertation
Full Text:: . John Gambatese, Dr. Timothy Kennedy, and Dr. Michael Scott. Conducting large scale experiments

Numerical Studies on Fluid-Structure Interaction and Applications

Creator:: Chen, Ming
Abstract:: Fluid-structure interaction (FSI) has been of significant research interest worldwide over the past several decades because of its variety of applications in both offshore and coastal engineering. Researchers analyzing FSI systems rely heavily on experimental tests in model scale in laboratories or large-scale sea trials. However, these tests are often...
Resource Type:: Dissertation
Full Text:: and Prof. Michael Scott, who offered advice and reviewed my research work. I also very much

Analysis of spatial data from terrain models for landslide predictive mapping

Creator:: Santha, Rubini
Abstract:: Landslides are a pervasive hazard that can result in substantial damage to properties and loss of life throughout the world. To understand the nature and scope of the hazard, landslide hazard mapping has been an area of intense research by identifying areas most susceptible to landslides in order to mitigate...
Resource Type:: Dissertation
Full Text:: committee members Dean. Scott Ashford, Dr.Dan Gillins, Prof. Robert Schultz, and Dr. Marc Norcross for

Hybridized framing to modify load paths and enhance wood shearwall performance

Creator:: Bultena, Sarah M.
Abstract:: Heavy timber framing relies primarily on bracing to withstand lateral loads due to earthquakes and wind events. Bracing configurations in heavy timber framed buildings vary widely and include cross bracing, knee bracing, and other geometries. Many heavy timber frames constructed during colonial American times are still standing, exceeding the expected...
Resource Type:: Masters Thesis
Full Text:: . Unit shear comparisons for shearwalls under lateral loads. ............... 35 3.3. P-values from

Tsunami and hurricane wave loads on bridge superstructures

Creator:: Azadbakht, Mohsen
Abstract:: This dissertation examines tsunami and hurricane wave loads on bridge superstructures. Tsunamis have caused significant damage to coastal communities in recent years. For example, the 2011 Great East Japan Earthquake and resulting Tohoku Tsunami destroyed infrastructure along the east coast of Japan including bridge superstructures. Recent hurricanes have also caused...
Resource Type:: Dissertation
Full Text:: thank my Ph.D. committee members, Dr. Andre Barbosa, Dr. Michael Olsen, Dr. Michael Scott, and Dr

Dynamic response of an offshore structure to measured and simulated stochastic wave forces

Creator:: Grecco, Michael G.
Abstract:: The dynamic response of an offshore structure to measured and simulated stochastic wave forces is investigated. The theoretical nondeterministic analysis is performed in the frequency domain for a two-dimensional model. The ocean wave system is assumed to be a zero mean, stationary, ergodic Gaussian process described by a one-dimensional wave...
Resource Type:: Masters Thesis
Full Text:: and Scott theoretical wave energy density spectra are fitted to the variance and to the best least

Cometabolic degradation of polycyclic aromatic hydrocarbons (PAHs) and aromatic ethers by phenol- and ammonia-oxidizing bacteria

Creator:: Chang, Soon Woong
Abstract:: Cometabolic biodegradation processes are potentially useful for the bioremediation of hazardous waste sites. In this study the potential application of phenol-oxidizing and nitrifying bacteria as "priming biocatalysts" was examined in the degradation of polycyclic aromatic hydrocarbons (PAHs), aryl ethers, and aromatic ethers. We observed that a phenol-oxidizing Pseudomonas strain cometabolically...
Resource Type:: Dissertation
Full Text:: and aromatic ethers including naphthalene, acenaphthene, diphenyl ether, dibenzofuran, dibenzo-p

Investigation of Drilled Shafts under Axial, Lateral, and Torsional Loading

Creator:: Li, Qiang
Abstract:: Drilled shaft foundations provide significant geotechnical resistance for support of structures, such as highway bridges, traffic sign, and signal pole structures, and are used widely to meet their structural foundation requirements. The amount of steel reinforcement in drilled shaft foundations has increased over the past several decades to account for...
Resource Type:: Dissertation
Date Created:
Full Text:: . Based on the empirical soil reaction- displacement (p-y) curves, a region-specific p-y curve model was

Cyclic triaxial testing of low- to moderate-plasticity silts

Creator:: Butler-Brown, Jason J.
Abstract:: This project report presents a laboratory investigation of the dynamic behavior of saturated alluvial silty soils from sites in Oregon and Washington. The focus of the study was to document the liquefaction susceptibility, post cyclic strength, and volumetric strain behavior of the silt soils based on cyclic, undrained triaxial compression...
Resource Type:: Masters Thesis
Full Text:: /p' ratios were also recorded for the silt soils. This observation highlights the need to obtain

Random wave forces on cylinders

Creator:: Hsu, Ming-kuang
Abstract:: The in-line force power spectrum is predicted by the frequency domain maximum force coefficient [C[subscript μn](z,f[subscript n])] vs. Keulegan-Carpenter number [K[subscript n] (z,f[subscript n])] relationship. The frequency domain Keulegan- Carpenter number is defined as the velocity from the amplitude spectrum at f divided by the respective frequency and diameter of...
Resource Type:: Dissertation
Full Text:: (z,fn) C H n (z) p C T n (z) p C V n (z) p Total force coefficient, see Eq. (2.1-1

Observations and prediction of intermittent sediment suspension in the surf zone

Creator:: Yoon, Hyun Doug
Abstract:: In this dissertation the interactions between hydrodynamics, sediment suspension and transport, and morphological evolution in the surf zone was investigated with a large-scale laboratory experiment data, CROss-Shore Sediment Transport Experiment (CROSSTEX). The data set included comprehensive measurements of water surface elevation, fluid velocity, sediment concentration, and morphology for irregular waves...
Resource Type:: Dissertation
Full Text:: submitted to Coastal Engineering in August, 2011. References Scott, C. P., D. T. Cox, T. B

Application of the generalized Melnikov method to weakly damped parametrically excited cross waves with surface tension

Creator:: Fadel, Suzan M.
Abstract:: The Wiggins-Holmes extension of the generalized Melnikov method (GMM) is applied to weakly damped parametrically excited cross waves with surface tension in a long rectangular wave channel in order to determine if these cross waves are chaotic. The Lagrangian density function for surface waves with surface tension is simplified by...
Resource Type:: Dissertation
Full Text:: ). (b) The flow on a two-dimensional torus on CIA for H(P P2) = E (after Lichtenberg & Lieberman

The application of centrifugal modeling to determine ice forces on isolated circular structures

Creator:: Clough, Herbert F.
Abstract:: A test system was developed and used to investigate ice/structure interaction with centrifugal modeling. The test system was designed to perform two main functions: (1) create a uniform ice sheet, and (2) drive a model structure through the ice sheet at a constant speed. Both of these functions were required...
Resource Type:: Masters Thesis
Full Text:: . Scaling Relationships for Centrifugal Modeling (After Scott and Morgan, 11) 11 2.2. -- Correlation

Watershed modeling at Yucca Mountain, Nevada

Creator:: Britch, Michael J.
Abstract:: Studies are currently underway to determine the suitability of Yucca Mountain in Nevada as the nation's first high-level nuclear waste repository. Values of net infiltration are required to determine pre-waste emplacement groundwater travel times and the performance of the repository as a waste containment system. The objective of this study...
Resource Type:: Masters Thesis
Full Text:: /yr). Scott et al. (1983) developed a conceptual hydrologic model of Yucca Mountain. They estimated

Assimilation of Multi-Sensor Data into Numerical Hydrodynamic Models of Inland Water Bodies

Creator:: Javaheri, Amir
Abstract:: Numerical models are effective tools for simulating complex physical processes such as hydrodynamic and water quality processes in aquatic systems. The accuracy of the model is dependent on multiple model parameters and variables that need to be calibrated and regularly updated to reproduce changing aquatic conditions accurately. Multi-sensor water temperature...
Resource Type:: Dissertation
Full Text:: Valley. Red dots show the USGS discharge stations at IGD, Shasta, Scott, and Seiad Valley stations

Nutrients in runoff from spray irrigation of swine wastes

Creator:: Taylor, Dennis William
Abstract:: Major emphasis of this research study involved the evaluation of nutrient transport by overland flow. Samples gathered at various distances relative to a swine-waste spray irrigation system were used for the nutrient evaluation. As a result of this study, the following conclusions are made: 1. It is improbable that the...
Resource Type:: Masters Thesis
Full Text:: station. 31 6. Nitrate-N versus sample station. 32 7. Orthophosphate-P versus sample station. 33 8

The seismic geotechnical modeling, performance, and analysis of pile-supported wharves

Creator:: McCullough, Nason J.
Abstract:: This dissertation presents the results of a research effort conducted to better understand the seismic performance and analysis of pile-supported wharves. Given the limited number of well-documented field case histories, the seismic performance of pile-supported wharves has been poorly quantified, and the analysis methods commonly employed in engineering practice have...
Resource Type:: Dissertation
Full Text:: undergraduate studies, and Scott Schlechter, a good friend and graduate colleague, who helped design, construct

Engineering properties of Oregon and Washington coast range soils

Creator:: Alto, Jalmer V.
Abstract:: Landslides are frequent in the steep forested regions of the Oregon and Washington coastal mountain ranges. The need for forest products has resulted in increasing logging activity in these marginally stable areas. The occurrence of landslides has increased, which in turn has focused greater interest in slope stability management. Of...
Resource Type:: Masters Thesis
Full Text:: Research Institute. Oregon St. Univ. Corvallis, Oregon. Vol. 56, 94 p. Scott, R.F. 1963 Principles of Soil

Development of a Reliability-Based Framework and Empirical Models for Justifying Allowable Chloride Limits and Quantifying Critical Input Variables for Predicting the Service Life of Reinforced Concrete Structures

Creator:: Shakouri Hassanabadi, Mahmoud
Abstract:: Significant progress has been made over the past 20 years in developing models to estimate the service-life of reinforced concrete systems. The basic understandings of the mechanisms that control the transport of ions and moisture in concrete systems have been well researched and models for determining corrosion initiation, specifically chloride-induced...
Resource Type:: Dissertation
Full Text:: with the selected Cs points………..….. 104 4.4 Relationship between measured Cs,1, Cs,2, and Cs,p

A stochastic precipitation event model for use in erosion simulations

Creator:: Istok, J. D.
Abstract:: Mathematical models of the precipitation process are needed to effectively use historical precipitation data in the design and planning of engineering projects and for analysis of watershed runoff behavior. Existing simple models based on the assumptions of independent, identically-distributed random variables are insufficient to describe several features of the historical...
Resource Type:: Dissertation
Full Text:: p and q (p+q = 1) are the probabilities of an event and a nonevent at each discrete time and 13

Design and fatigue behavior of near-surface mounted CFRP bars for shear strengthening of RC bridge girders

Creator:: Johnson, Brandon Ang
Abstract:: Carbon fiber reinforced polymer (CFRP) materials are emerging as an effective means of strengthening and rehabilitating bridges. Near surface mounting (NSM) is a newer technique for application of CFRP for retrofitting of bridge members that provides advantages over conventional strengthening techniques. The technique is still new and uncertainties remain regarding...
Resource Type:: Masters Thesis
Full Text:: Dyson, Scott Mersereu, Anthony Peressini, and Nick Atanasov. I would also like to acknowledge the

The Application of Machine Learning Techniques on Marine Science Models

Creator:: Ellenson, Ashley
Abstract:: A variety of stakeholders require information about marine systems. In the open ocean, pilots of marine vessels require knowledge about environmental conditions for safe passage and route planning. On the coastline, communities rely on information about nearshore dynamics to increase safety from coastal hazards such as nearshore pollutants, coastal erosion,...
Resource Type:: Dissertation

Finite element analysis of culverts under embankments with time dependent and non-linear properties

Creator:: Lertlaksana, Voravit
Abstract:: A computer program was developed for analyzing culverts under earth embankments constructed of compacted cohesive soil using the finite element method. The culvert-embankment system is represented as a two-dimensional plane strain problem. The plane of investigation is taken normal to the culvert axis. The soil-culvert interface is assumed to be...
Resource Type:: Dissertation
Full Text:: written as (x - P.)2 + (y - Q.)2 = R. 15 (2. 18) The circular member has 6 degrees of freedom as shown

An Agent-Based Simulation for Emergency Warning Dissemination in a Multiplex Social Network

Creator:: Koll, Charles D.
Abstract:: The variety of natural disasters provide different sets of characteristics and properties with unique challenges. One significant difference between hazard types is prewarning lead time, the amount of time individuals have from a potential warning to the disaster occurring. Rapid onset disasters may not provide an official warning about a...
Resource Type:: Masters Thesis
Full Text:: ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 3.2.2 Probability to Share Information (p

Hydraulic functions of soils from physical experiments and their applications

Creator:: Su, Charles
Abstract:: Based upon the Pearson Type VIII distribution function, a general retention function which relates the saturation to the capillary pressure in disturbed soils has been discovered. This simple and yet complete function has been shown to describe precisely the imbibition as well as the drainage branch of the retention curve....
Resource Type:: Dissertation
Full Text:: pore-size distribution. In their equation, P b S e P = (-- for P > Pb and S e = 1.0 for P < Pb (2

Reservoir design criteria

Creator:: Rosebraugh, Vernon Hart
Resource Type:: Masters Thesis
Full Text:: has been 155 gallons per day per capita (4, p. 65), slightly less than the National average, but

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