Index Catalog // ScholarsArchive@OSU

Improving Safety of the Platform-Train-Interface Through Operational and Technical Mitigation Strategies

Creator:: Anderson, Dylan
Abstract:: The purpose of this study is to provide background information and examples of best practices relating to platform-train-interface (PTI) safety. The research and information obtained for this manuscript has been in association with the A-40 project funded by the Transit Cooperative Research Program (TCRP) of the National Academies. The purpose...
Resource Type:: Masters Thesis
Full Text:: Operational and Technical Mitigation Strategies

CALTRANS: Impact of the Use of Portland-Limestone Cement on Concrete Performance as Plain or Reinforced Material - Final Report

Creator:: Bharadwaj, Keshav, Chopperla, Kirshna Siva Teja, Choudhary, Antara, Glosser, Deborah, Ghantous, Rita Marie, Vasedevan, Gokul, Ideker, Jason H., Isgor, Burkan, Trejo, David, and Weiss, W. Jason
Abstract:: CALTRANS does not currently allow Portland-Limestone Cements (PLC) to replace Ordinary Portland Cement (OPC) in concrete. PLC has been proposed for consideration in CALTRANS specifications due to potential benefits in reducing greenhouse gas (GHG) emissions. This report outlines a comprehensive plan to provide both experimental and computational analysis results to...
Resource Type:: Technical Report
Full Text:: .................................................................. 121 Table 12.1. Comparison of measured air contents for OPC and PLC mixtures; note that the target

Integrating Science Needs with Advanced Seafloor Sensor Engineering to Provide Early Warning of Geohazards: Visioning Workshop and Roadmap for the Future

Creator:: Parrish, Christopher E., Mason, H. Benjamin, Trehu, Anne M., Hollinger, Geoffrey A., Selker, John S., and Zhang, Eugene
Abstract:: The workshop was funded by the National Science Foundation (NSF), OCE Division of Ocean Sciences (Award # 1817257). This report summarizes the key findings, outcomes, and recommendations of the workshop and serves as a draft of the comprehensive roadmap.
Resource Type:: Technical Report
Full Text:: the Future Final Report for NSF Grant No. OCE-1817257 13 June 2019 Christopher

Rigid-Object Water-Entry Impact Dynamics: Finite- Element/Smoothed Particle Hydrodynamics Modeling and Experimental Validation

Creator:: Challa, Ravi, Yim, Solomon C., Idichandy, V. G., and Vendhan, C. P.
Abstract:: A numerical study on the dynamic response of a generic rigid water-landing object (WLO) during water impact is presented in this paper. The effect of this impact is often prominent in the design phase of the re-entry project to determine the maximum force for material strength determination to ensure structural...
Resource Type:: Technical Report
Full Text:: overall configuration of the WLO prototype is shown in Fig. 1. Note that the conical portion (nose part of

Rigid-Body Water–Surface Impact Dynamics: Experiment and Semianalytical Approximation

Creator:: Challa, Ravi, Yim, Solomon C., Idichandy, V. G., and Vendhan, C. P.
Abstract:: An experimental study of the dynamics of a generic rigid body during water impact and an equivalent-radius approximate analytical procedure is developed and calibrated in this study. The experimental tests in a wave basin covered a range of drop heights using a 1/6th-scale model of a practical water-landing object prototype...
Resource Type:: Technical Report
Full Text:: fabricated as a conical shell with a rounded nose. Note that the conical portion (nose part of the rigid body

The Influence of Expansive Additives on Early Age Shrinkage and Stress Development

Creator:: Wilson, Cameron, Ideker, Jason, and Weiss, W. Jason
Abstract:: The objective of this project was to investigate the performance of three different expansive additives on the hydration properties, volume change, and stress development of Portland cement pastes and concrete.
Resource Type:: Technical Report
Full Text:: Figure 1-13 shows that additive type SRI-D has no effect on heat released at the 3% replacement amount

An Efficient Three-Dimensional FNPF Numerical Wave Tank for Large-Scale Wave Basin Experiment Simulation

Creator:: Nimmala, Seshu B., Yim, Solomon C., and Grilli, Stephan T.
Abstract:: This paper presents a parallel implementation and validation of an accurate and efficient three-dimensional computational model (3D numerical wave tank), based on fully nonlinear potential flow (FNPF) theory, and its extension to incorporate the motion of a laboratory snake piston wavemaker, as well as an absorbing beach, to simulate experiments...
Resource Type:: Technical Report
Full Text:: as no sig- nificant reflected waves can be seen in the wave gauge records. Note, as discussed above

Geotechnical Reconnaissance: The 28 September 2018 M7.5 Palu-Donggala, Indonesia Earthquake

Creator:: Mason, H. Benjamin, Gallant, Aaron P., Hutabarat, Daniel, Montgomery, Jack, Reed, A. Nicole, Wartman, Joseph, Irsyam, Masyhur, Prakoso, Widjojo, Djarwadi, Didiek, Harnanto, Dandung, Alatas, Idrus, Rahardjo, Paulus, Simatupang, Pintor, Kawanda, Aksan, and Hanifa, Rahma
Abstract:: The Mw7.5 Palu-Donggala earthquake occurred on 28 September 2018 at 6:02 PM local time, and was caused by strike-slip faulting along the north-south trending Palu-Koro fault that extends through Palu City and the Central Sulawesi region of Indonesia. The United States Geological Survey (USGS) reports the epicenter was approximately 72...
Resource Type:: Technical Report
Full Text:: National Foundation through the Geotechnical Engineering Program under Grant No. CMMI-1266418. The GEER

Construction risks allocation : optimal risk allocation decision support model

Creator:: Alsalman, Ali Abdullah
Abstract:: It has been suggested that projects in the construction industry are subject to risks more than other industries. However, there is often little parity in allocation of risks in the construction industry. Usually, project participants allocate risks by aversion where owners tend to shift risks to the primary contractor, who...
Resource Type:: Dissertation
Full Text:: main categories: behavioral, technical, and organizational barriers. Lack of an efficient risk

Engineering design and analysis of pipe ramming installations

Creator:: Meskele, Tadesse
Abstract:: The trenchless technology known as pipe ramming for construction of culverts and buried pipes under roadways or other infrastructure has gained significant popularity due to its cost-effectiveness and ability to alleviate surface disruptions associated with open-cut trenching. Although the experience with pipe ramming is increasing, there has been remarkably little...
Resource Type:: Dissertation
Full Text:: technical guidance available for engineers to appropriately specify aspects of a pipeline or culvert

Shrinkage study of high performance concrete for bridge decks

Creator:: Fu, Tengfei
Abstract:: In the field of civil infrastructure, bridge desks are typically constructed using high performance concrete (HPC). Concrete bridge decks demand qualities such as low permeability, high abrasion resistance, superior durability, and long design life. Over decades of field and laboratory experience, many HPC bridge decks have been found to be...
Resource Type:: Dissertation
Full Text:: of highly cracking resistant HPC is not clearly established either in the technical literature or

Evaluation of Driver Behavior during Right Turn Maneuvers at Signalized Intersections: Mitigation of Driver-Pedestrian Conflicts with a Right Turn Flashing Yellow Arrow

Creator:: Jashami, Hisham
Abstract:: Accommodating motor vehicles that are turning (left or right) at signalized intersections requires a careful understanding of the safety and efficiency of design and operational variables. Turning vehicles are the primary collision risk for non-motorized road users at signalized intersections. When turning movements need to be controlled, proper driver response...
Resource Type:: Dissertation
Full Text:: comprehensive review of more than 100 scientific and technical articles that relate to the selection of right

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:: of technical guidance, specifically related to long-term durability, on incorporating RCA into new

Amplification of solitary waves along a vertical wall

Creator:: Li, Wenwen
Abstract:: Reflection of an obliquely incident solitary wave at a vertical wall is studied experimentally in the laboratory wave tank. Precision measurements of water-surface variations are achieved with the aid of laser-induced fluorescent (LIF) technique and detailed temporal and spatial features of the Mach reflection are captured. During the development stage...
Resource Type:: Dissertation
Full Text:: analyze validation of the theory; note that substantial discrepancies exist from previous (both numerical

Review of guidelines for the design of tsunami vertical evacuation buildings

Creator:: Cawley, Jessica Grace
Abstract:: Tsunamis have the potential to inflict severe damage and loss of life in coastal communities. Structures known as vertical evacuation buildings provide an alternative evacuation site for communities living in relatively flat, coastal regions with inadequate sources of high ground for evacuation. Design of these structures balances risk and economy,...
Resource Type:: Masters Thesis
Full Text:: requires both technical and social design considerations. The design must be ductile enough to resist

Dual Purpose Utilization of Titanium Alloy Bars for Impressed Current Cathodic Protection and Near Surface Mounted Retrofit in Reinforced Concrete Beams

Creator:: Slawinski, Amanda K.
Abstract:: Many older reinforced concrete bridges and buildings in the United States are considered deficient due to past design codes that are not conservative, increased loading, and deterioration of structural components. Deterioration is most commonly caused by corrosion, which reduces the steel cross sectional area and damages the concrete cross section....
Resource Type:: Masters Thesis
Full Text:: . To achieve this goal, a number of technical challenges were overcome, including selection and

Three Topics on Coastal Hazards : Propagation, Transformation, and Impact

Creator:: Ko, Harrison T.
Abstract:: An understanding of natural coastal hazards is essential for improving resilience of coastal communities. Effective management of coastal hazards relies on prediction tools and mitigation structures that have been designed to handle the dynamic coastal system. This dissertation is a collection of manuscripts that cover a diverse range of fundamental...
Resource Type:: Dissertation
Full Text:: . Note that this procedure can produce variances with space and time dependencies, which are critical to

Interactive Genetic Algorithms for watershed planning : an investigation of usability and human-centered design

Creator:: Piemonti, Adriana Debora
Abstract:: Degradation of watersheds is a major concern in areas where adverse climate effects and unsustainable use of the natural resources have caused extensive stresses to watershed systems (e.g., increased floods, increased droughts, worsened in-stream water quality) through the years. While considerable efforts are being made to generate technical solutions that...
Resource Type:: Dissertation
Full Text:: considerable efforts are being made to generate technical solutions that focus on plans of spatially

Static and cyclic response of ecoroof soil

Creator:: Kraupa, Travis J.
Abstract:: Green technology in the United States has been on the rise over the past few decades in the United States. However, certain green technologies have been developed in the absence of design standards. Ecoroofs, which are vegetated soil masses placed on the top of a building’s roof structure, present several...
Resource Type:: Masters Thesis
Full Text:: representative ecoroof gradations, which varied in the amount of fines present (i.e. material passing No. 200

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:: threaded rods experienced no visible deformation during the test. The system provided adequate energy

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