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Filtering by: Creator Mitchell, J. C. Remove constraint Creator: Mitchell, J. C. Degree Field Civil Engineering Remove constraint Degree Field: Civil Engineering

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  • 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
    Full Text:
    4.8: Thermodynamic properties. k (W/m·°C) [ Btu/hr·ft·°F] c (J/kg·°C) [ Btu/lb ·°F] ρ (kg/m3

  • Effect of an Idealized Mangrove Forest of Moderate Cross-shore Width on Loads Measured on a Sheltered Structure and Comparison with Predicted Forces

    Creator:
    Mitchell, William T.
    Abstract:
    As coastal communities face increasing chronic and acute hazards, nature-based coastal engineering solutions have experienced a rapid growth in popularity and interest. Recent works on this topic have shown that “Green Infrastructure” may be effective at mitigating coastal hazards and therefore provide sustainable adaptation alternatives to traditional engineering solutions such...
    Resource Type:
    Masters Thesis
    Full Text:
    ABSTRACT OF THE THESIS OF William Thomes Mitchell for the degree of Master of Science in Civil

  • Analysis of diagonally cracked conventionally reinforced concrete girders in the service load range

    Creator:
    Robelo, Melissa J.
    Abstract:
    Performance evaluation of conventionally reinforced concrete (CRC) bridge superstructure elements with diagonal cracks is of interest to the bridge engineering community. Standardized methods to predict service-level stress magnitudes in cracked bridge girders under combined bending and shear forces are not available. An analysis procedure was developed to determine the response...
    Resource Type:
    Masters Thesis
    Full Text:
    AN ABSTRACT OF THE THESIS OF Melissa J. Robelo for the degree

  • Radiometric Calibration of EAARL‐B Bathymetric Lidar Data

    Creator:
    Wilson, Nicholas C.
    Abstract:
    The Experimental Advanced Airborne Research Lidar ‐ B (EAARL‐B), which was built and deployed by the U.S. Geological Survey (USGS) in 2014, is a novel topographic‐bathymetric lidar system. While retaining a number of features that were pioneered in the original National Aeronautics and Space Administration (NASA) EAARL system (e.g., low...
    Resource Type:
    Masters Thesis
    Full Text:
     THE THESIS OF    Nicholas C. Wilson for the degree of Master of Science in Civil Engineering

  • Ultimate and serviceability limit state reliability-based axial capacity of deep foundations

    Creator:
    Reddy, Seth C.
    Abstract:
    Deep foundations are necessary for the construction of many structures, such as bridges and buildings, located in areas unsuitable for shallow foundations. Owing to the inherent variability of soil and the complex changes that occur in the soil adjacent to deep foundations as they are installed, the ability to accurately...
    Resource Type:
    Dissertation
    Full Text:
    DISSERTATION OF Seth C. Reddy for the degree of Doctor of Philosophy in Civil Engineering presented on

  • 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:
    Model for Use in Erosion Simulations Abstract approved: Redacted for Privacy a Peter C. Klingeman

  • Radar and Optical Remote Sensing of Submesoscale Frontal Features

    Creator:
    Simpson, Alexandra J.
    Abstract:
    The coastal region is home to many types of surface fronts that exist on a submesoscale (1-10 $km$). While in situ observations capture point or transect observations of frontal behavior subsurface, their complex spatial patterns can be well-captured using remote sensing techniques, which provide synoptic views of the ocean surface...
    Resource Type:
    Dissertation
    Full Text:
    AN ABSTRACT OF THE DISSERTATION OF Alexandra J. Simpson

  • 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:
    Wave Observation Systems Masters of Science Project Report Shay J. Meskill 01/13/2010

  • Quantification of landslide movement in a forested environment

    Creator:
    Conner, Jeremy C.
    Abstract:
    Landslides are an insidious natural hazard, which can result in significant damage to public infrastructure. Limited monitoring tools are available, particularly tools suitable for use in forested environments. These tools often only allow a few locations across the slide to be monitored. Terrestrial Laser Scanning (TLS) shows promise as a...
    Resource Type:
    Masters Thesis

  • Ultimate bearing capacity of shallow footings on plastic silt

    Creator:
    Newton, Vernon C.
    Abstract:
    The usual approach to calculation of the ultimate bearing capacity of plastic silt is to assume no porewater drainage occurs during the loading period. The coefficient of permeability of plastic silt is generally significantly larger than clay; therefore, partial drainage of porewater may occur during the loading period. This study...
    Resource Type:
    Masters Thesis
    Full Text:
    AN ABSTRACT OF THE THESIS OF VERNON C. NEWTON III for the

  • Mooring analysis of the Ocean Sentinel through field observation and numerical simulation

    Creator:
    Baker, Joshua L.
    Abstract:
    This study presents a mooring analysis of the Ocean Sentinel buoy, which is a mobile test platform for Wave Energy Converters. The Ocean Sentinel is owned and operated by the Northwest National Marine Renewable Energy Center (NNMREC) at Oregon State University (OSU). The study involved a field observation as well...
    Resource Type:
    Capstone Project
    Full Text:
    approved:________________________________________________________ Solomon C. Yim This study presents

  • 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:
    Deck-Girder Bridge Bent Caps with Vintage Details Abstract approved: Christopher C. Higgins

  • Testing and evaluation of flexural reinforcing bars terminating in columns

    Creator:
    Koester, Carl C.
    Abstract:
    Capacity of transverse 1950's vintage reinforced concrete deck girder bridge bent caps with large straight bar anchorages were investigated and evaluated. Eleven subassemblage column specimens were examined with different anchorage lengths, bar groupings, amount of transverse steel, and externally applied axial force. Test results showed an increase in anchorage capacity...
    Resource Type:
    Masters Thesis
    Full Text:
    AN ABSTRACT OF THE THESIS OF Carl C. Koester for the degree

  • Environmental durability of reinforced concrete deck girders strengthened with surface-bonded carbon fiber-reinforced polymer

    Creator:
    Sopal, Gautam Jayant
    Abstract:
    Long-term durability of surface-bonded carbon fiber-reinforced polymer (CFRP) 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 environmental exposure and combined...
    Resource Type:
    Masters Thesis
    Full Text:
    with Surface-Bonded Carbon Fiber-Reinforced Polymer. Abstract approved: Christopher C

  • 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:
    , T. L. Willrick, P. C. Bennett and. J. T. McCall. The nitrate problem. Special Report No. 34, Iowa

  • Shear strengthening reinforced concrete bridge girders using near-surface mounted titanium alloy bars

    Creator:
    Knudtsen, Jonathan
    Abstract:
    Aging and deficient infrastructure has become a major problem throughout the world. This is particularly evident in the case of reinforced concrete (RC) bridges. The cost of replacing these bridges is often prohibitive, thus engineers must find ways to strengthen them. Many older RC bridges predate the modern understanding of...
    Resource Type:
    Masters Thesis
    Full Text:
    . Abstract approved: _________________________________________________________ Christopher C. Higgins

  • 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:
    Fatigue Loads AN ABSTRACT OF THE THESIS OF Peter C. Fetzer for the degree of Master of Science in

  • 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:
    : ______________________________________________________________________ Christopher C. Higgins Large numbers of vintage reinforced concrete deck-girder bridges

  • 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:
    : ______________________________________________________ Christopher C. Higgins Pile caps are structural elements used to transfer loads from

  • Application of Titanium Alloy Bars for Strengthening Reinforced Concrete Bridge Girders in Flexure

    Creator:
    Vavra, Eric
    Abstract:
    Structurally efficient and cost-effective solutions are needed to extend the service-life of deficient and aging highway infrastructure around the world. One critical need is to increase the flexural strength of older reinforced concrete (RC) structures to carry heavier and more frequent loads. Titanium alloy bars (TiAB) offer a new opportunity...
    Resource Type:
    Masters Thesis
    Full Text:
    . Abstract approved: _________________________________________________________ Christopher C. Higgins

  • 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:
    Tank Based on Coupled Potential Flow–Viscous Flow Model Abstract approved: Solomon C. Yim In this

  • 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
    Full Text:
    . Mitchell, Thomas Schumacher, A. Ekin Senturk, Matthew Smith, Gautam J. Sopal and O. Tugrul Turan

  • 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:
    . Abstract approved: ______________________________________________________ Christopher C. Higgins

  • Flexural anchorage performance and strengthening on negative moment regions using near-surface mounted retrofitting in reinforced concrete bridge girders

    Creator:
    Barker, Laura
    Abstract:
    Large numbers of reinforced concrete deck girder (RCDG) bridges were built during the highway infrastructure boom of the 1950's. The advent of standardized deformed steel reinforcing bars during this time allowed for straight bar terminations in flexural tension regions. Designers of the time terminated reinforcing bars where they were no...
    Resource Type:
    Masters Thesis
    Full Text:
    : ______________________________________________________ Christopher C. Higgins Large numbers of reinforced concrete deck girder (RCDG

  • 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
    Full Text:
    : _______________________________ Christopher C. Higgins Many conventionally reinforced concrete deck girder bridges (RCDG

  • Vertical jet diffusion in non linear density stratified fluid

    Creator:
    Baumgartner, D. J. (Donald John), 1933-
    Abstract:
    The simplified equations of motion proposed by Morton to determine the extent of vertical travel of a forced plume in a linear density stratified environment were re-written and solved in a way which allowed them to be applied to any non linear profile of density. For application to any specific...
    Resource Type:
    Dissertation
    Full Text:
    the guidance and support receiveJ from Dr. D. C. Phillips, Professor F. J. Burgess, and Dr. L. S

  • Influence of Uncertainties in Terrestrial Laser Scanning on Structural Reliability and Bridge Load Rating

    Creator:
    Loving, Carly K.
    Abstract:
    To ensure the safety of the nation’s bridges, the National Bridge Inspection Standards (NBIS) require all bridges to undergo routine load rating analyses to assess their structural capacity. Accurate geometric information for each structure is necessary for load rating analyses. This information is typically ascertained from as-built plans. Still, when...
    Resource Type:
    Masters Thesis
    Full Text:
    Abstract approved: ______________________________________________________ Andre R. Barbosa, Michael J

  • On the Imaging of Rip Currents in X-band Radar

    Creator:
    Kloster, Rebecca
    Abstract:
    Rip currents pose a serious danger to visitors of bathing beaches; they are also an important process in surf zone circulation. Haller et al. [2014] demonstrated that shore-based X-band radar can be used to compliment in situ measurements of rip currents. However, little is known of the underlying radar imaging...
    Resource Type:
    Masters Thesis
    Full Text:
    Abstract approved: Merrick C. Haller Rip currents pose a serious danger to visitors of bathing beaches

  • 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:
    of an I-section is given as: 2 4 y w I h C  [2.10] The torsional constant (J), for an I

  • Estimating the in situ Stratification via Remotely-sensed Internal Wave Speeds

    Creator:
    Fang, Chufan
    Abstract:
    This work investigates a methodology for estimating the ocean stratification gradient based on high-resolution, in space and time, remote sensing observations of internal wave propagation speeds. The internal wave speed observations were collected using a shore-based, X-band marine radar and the ocean vertical density profiles were collected simultaneously from an...
    Resource Type:
    Masters Thesis
    Full Text:
    ., Lerczak, J. A., & Haller, M. C. (2021). Internal wave transformation across the inner shelf via combined

  • 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:
    approved: ___________________________________________________________ Christopher C. Higgins

  • 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:
    : _______________________________________________________ Solomon C. Yim Abstract: This dissertation examines tsunami and hurricane wave loads on

  • The use of LiDAR to identify forest transportation networks

    Creator:
    Beck, Storm J. C.
    Abstract:
    The production of high value non-conventional products, such as long utility poles; or the production of low value bulky products, such as chips or grindings; provide opportunities for forest owners to increase value from their forests. The transport of these products requires the use of specialized trucks and trailers. However,...
    Resource Type:
    Masters Thesis
    Full Text:
    ................................................................................................................................... 97 Appendix C

  • The Fundamental Behavior of CLT Floor-to-Wall Connections in Fire

    Creator:
    Redus, James Aaron
    Abstract:
    This thesis focuses on the fundamental behavior of CLT floor-to-wall connections during a fire. Cross-laminated timber (CLT) panelized structures rely on floor-to-wall connections for the load path and stability of the structure. Additionally, the fire performance of these connections is critical to prevent horizontal or vertical fire spread within these...
    Resource Type:
    Masters Thesis
    Full Text:
    Abstract approved: _____________________________________________________ Lech Muszyński Erica C. Fischer

  • Local scour at isolated obstacles on river beds

    Creator:
    Huang, Cheng-Chang
    Abstract:
    Maximum equilibrium scour depths, equilibrium scour volumes, and induced equilibrium movements at isolated obstacles on river beds were investigated in clear-water scour. The research was achieved by a systematic flume study based on the results of dimensional analysis of local scour. The main tested obstacles for local scour were cubes....
    Resource Type:
    Dissertation
    Full Text:
    : Redacted for Privacy Peter C. KlingemaY Maximum equilibrium scour depths, equilibrium scour volumes, and

  • Simulating the effects of a capillary barrier using the two-dimensional variably saturated flow model SWMS-2D/HYDRUS-2D

    Creator:
    Heiberger, Thilo Stefan
    Resource Type:
    Masters Thesis
    Full Text:
    representing my minor professor, whose teaching widened my scope of knowledge in hydrology; to Dr. J. Istok

  • Ensemble-based data assimilation and depth inversion on the Kootenai River, ID, USA

    Creator:
    Landon, Kyle C.
    Abstract:
    Velocity measurements from drifter GPS records are assimilated and used in an ensemble-based inversion technique to extract the river bathymetry. The method is tested on a deep meandering reach and a shallow braided reach of the Kootenai River in Idaho, USA. The Regional Ocean Modeling System (ROMS) is used to...
    Resource Type:
    Masters Thesis
    Full Text:
    open-file report U.S. geological survey open-file report 2004-1045. 35 pp. Berenbrock, C. and J

  • Effects of pressure and deposit thickness on the stabilization rate of benthic marine sludge deposits

    Creator:
    Muellenhoff, W. P.
    Abstract:
    The biochemical degradation of domestic sludge deposits exposed to benthic marine conditions was investigated using a laboratory Deep Sea Simulator. The rate and extent of deposit stabilization were determined for select hydrostatic pressures and hydrogen acceptor conditions by monitoring depletion of particulate organic carbon in 2.0 and 3.0 centimeter deposits....
    Resource Type:
    Dissertation
    Full Text:
    refractory component was 0.21 mg-C/mg solid. Thereafter, degradation proceeded slowly. Comparable anaerobic

  • Abiotic and biological transformation of TBOS and TKEBS, and their role in the biological transformation of TCE and c-DCE

    Creator:
    Vancheeswaran, Sanjay
    Abstract:
    At Site-300, Lawrence Livermore National Laboratory (LLNL), CA, trichloroethene (TCE) is present along with tetraalkoxysilanes such as tetrabutoxysilane (TBOS) and tetrakis(2-ethylbutoxy) silane (TKEBS), as subsurface contaminants. Intrinsic transformation of TCE to cis-dichloroethene (c-DCE) was observed in the groundwater at locations co-contaminated with TBOS or TKEBS. Attenuation of TBOS and TKEBS...
    Resource Type:
    Masters Thesis
    Full Text:
    .; Walsh, D. A., J. Am. Chem. Soc., 1980, 102:6, 1859-1864. (6) Eaborn, C., Organo-silicon Compounds

  • Centrifuge Modeling of Soil Response to Tsunami-like Rapid Flooding and the Subsequent Drawdown

    Creator:
    Exton, Margaret C.
    Abstract:
    Soil instability from tsunami hazards causes substantial damage to coastal infrastructure (e.g., the damage caused by the 2011 Great East Japan Tsunami, or the Heisei Tsunami). Tsunamis are unpredictable, so it is difficult to obtain field-scale measurements. Simulating tsunamis in a laboratory setting is therefore important to further understanding of...
    Resource Type:
    Dissertation
    Full Text:
    AN ABSTRACT OF THE DISSERTATION OF Margaret C. Exton for the

  • Reliability-based Serviceability Limit State Design Procedures for Shallow Foundations

    Creator:
    Huffman, Jonathan C.
    Abstract:
    Reliability-based geotechnical foundation design focusses on soil and structure analysis that meets necessary safety, performance and/or serviceability criteria, calibrated based on probabilistic analyses and an accepted level of risk. As the civil engineering community seeks to better harmonize geotechnical and structural design methodologies, reliability-based design is being incorporated more into...
    Resource Type:
    Dissertation
    Full Text:
    ABSTRACT OF THE DISSERTATION OF Jonathan C. Huffman for the degree of Doctor of Philosophy in Civil

  • Substratum-aerated-biofilm reactor for treatment of carbonaceous and nitrogenous wastewaters

    Creator:
    Abdel-Warith, Ahmed S.
    Abstract:
    This study involves the development of a biofilm reactor that supports growth of a deep biofilm on a gas permeable membrane. The reactor solution is not aerated, and oxygen is supplied through the membrane. The reactor is termed a substratum-aerated-biofilm reactor or SAB. With adequate concentrations of electron-donors and electron-acceptors,...
    Resource Type:
    Dissertation
    Full Text:
    conducted in completely mixed, continuous-flow reactors maintained at 25°C with a hydraulic detention of 8

  • The Effects of Temperature on Electrical Resistivity Measurements of Concrete

    Creator:
    Coyle, Alex T.
    Abstract:
    Measuring resistivity as a method to calculate formation factor is becoming a popular way to evaluate transport properties of concrete. Resistivity measurements are dependent on multiple factors including the resistivity of the pore solution, leaching effects, the degree of saturation of the specimen, the age of the specimen (degree of...
    Resource Type:
    Masters Thesis
    Full Text:
    Figure 2-3 a) Temperature corrections with Tref = 23°C, Ea-cond = 25 kJ/mol showing a) α = 2.68 %/°C b

  • Consolidation characteristics of sand-clay mixtures

    Creator:
    Anderson, Donald G. (Donald Gordon)
    Abstract:
    Combinations of cohesive and cohesionless soils are often encountered when evaluating the engineering properties of soils. The stress-volume characteristics of the mixed soil are found to vary according to the proportion of each component. If the cohesive soil composes more than a certain fraction of the material, the magnitude of...
    Resource Type:
    Masters Thesis
    Full Text:
    : CONSOLIDATION CHARACTERISTICS OF SAND-CLAY MIXTURES Redacted for Privacy Abstract approved:_ Dr. J. R. Bell

  • Geotechnical significance of poorly crystalline soils derived from volcanic ash

    Creator:
    Thrall, F. G.
    Resource Type:
    Dissertation
    Full Text:
    values for effective angle of internal friction ( ;), undrained shear strength (c), and compression

  • Input/output energy analysis of regional water pollution control

    Creator:
    Heggen, Richard J.
    Abstract:
    Two strategic approaches to water quality control in Oregon's Willamette River are presently being utilized: point source treatment and flow augmentation. Dry weather releases from reservoirs are for authorized purposes other than water quality. Reservoirs can participate in pollution control by summer flow augmentation where authorized water resource objectives (flood...
    Resource Type:
    Dissertation
    Full Text:
    Energy Analysis of Regional Water Pollution Control Abstract approved: Redacted for Privacy Kenneth J

  • Cometabolic degradation of chlorophenolic compounds

    Creator:
    Wang, Gongming
    Resource Type:
    Dissertation
    Full Text:
    . All experiments were conducted at 31°C. Phenol was used as the primary substrate to support cells

  • Evaluation of straw wattle placement and surficial slope stability

    Creator:
    Rikli, Anthony M.
    Abstract:
    Straw wattles are common erosion control devices used to trap sediment. This thesis studies the relationship of straw wattles on slope stability through a case study demonstrating their use on steep slopes (1.5H:1V) for the US20 highway realignment project. Several surficial slope failures have occurred on these fill slopes, often...
    Resource Type:
    Masters Thesis
    Full Text:
    Abstract approved: Michael J. Olsen Straw wattles are common erosion control devices used to trap

  • Least squares adjustment computer programs for horizontal and vertical positions

    Creator:
    Shrestha, Ramesh Lal
    Abstract:
    The application of the least squares adjustment techniques to the area of surveying has been considered and two computer programs called HCONTRL and VCONTRL are developed for horizontal and vertical control respectively. The principle of least squares is discussed in chapter II. The observation and condition equations are compared and...
    Resource Type:
    Masters Thesis
    Full Text:
    + (y? - y?)21 1/2 J 1 J 1 Partially differentiating (3.05) gives 2Di6Di = 2(X3 - X7) (OX,c; - 6X

  • Wood materials and shearwalls of older light-frame residential structures

    Creator:
    Carroll, Cameron T.
    Abstract:
    Light-frame construction practices and materials have changed greatly over the past 100 years. Contemporary research has focused on modern construction; thus, we know a great deal about the behavior of modern lightframe buildings under lateral forces. However, there are many light-frame buildings that were built prior to the introduction of...
    Resource Type:
    Masters Thesis
    Full Text:
    Robert J. Leichti Light-frame construction practices and materials have changed greatly over the