Open Access. Powered by Scholars. Published by Universities.®

Civil and Environmental Engineering Commons

Open Access. Powered by Scholars. Published by Universities.®

7,418 Full-Text Articles 8,894 Authors 2,683,748 Downloads 72 Institutions

All Articles in Civil and Environmental Engineering

Faceted Search

7,418 full-text articles. Page 1 of 144.

Panama Canal - 100th Anniversary (Sc 2869), Manuscripts & Folklife Archives 2014 Western Kentucky University

Panama Canal - 100th Anniversary (Sc 2869), Manuscripts & Folklife Archives

MSS Finding Aids

Finding aid and full text of blog entries (click on "Additional Files" below) for Manuscripts Small Collection 2869. WKU Libraries blog entries relating to the 100th anniversary of the opening of the Panama Canal. Entries concentrate on materials held by WKU’s Department of Library Special Collections and are illustrated with items from the collection.


Field Cycle Length Sweep To Evaluate Resonant Cycle Sensitivity, Howell Li, Christopher M. Day, Alex M. Hainen, Amanda L. Stevens, Steven Lavrenz, W Benjamin Smith, Hayley Summers, Rick Freije, Jim Sturdevant, Darcy M. Bullock 2014 Purdue University

Field Cycle Length Sweep To Evaluate Resonant Cycle Sensitivity, Howell Li, Christopher M. Day, Alex M. Hainen, Amanda L. Stevens, Steven Lavrenz, W Benjamin Smith, Hayley Summers, Rick Freije, Jim Sturdevant, Darcy M. Bullock

JTRP Other Publications and Reports

Cycle length selection in corridor timing is often dictated by critical intersections with the highest level of saturation. Along corridors with balanced volumes and favorable link distances, a resonant cycle length is often sought to provide good progression in both directions of travel. This paper discusses the search for a resonant cycle length at a 5-intersection corridor in Fishers, Indiana over a three month period. The software traffic model suggests a reasonable range of cycle lengths from 104 seconds to 124 seconds for the corridor. This cycle length range is consistent with analytical highway capacity manual delay minimization approaches.

A ...


The Influence Of Lightweight Aggregate On Internal Curing And Its Impact On Autogenous Shrinkage Of High-Performance Concrete, Neil J. Hartman, Timothy J. Barrett, Jason Weiss 2014 Purdue University

The Influence Of Lightweight Aggregate On Internal Curing And Its Impact On Autogenous Shrinkage Of High-Performance Concrete, Neil J. Hartman, Timothy J. Barrett, Jason Weiss

The Summer Undergraduate Research Fellowship (SURF) Symposium

In bridge deck construction high performance concrete is often desirable, however in practice it is generally susceptible to early-age shrinkage cracking resulting in an overall reduction in service life. This research seeks to assess the potential for reducing early-age shrinkage in new bridge deck construction through the use of internal curing, a process in which internal reservoirs supply water to the hydrating cement paste during the early stages of cement hydration. In North America, internal curing is typically achieved by replacing a portion of the normal fine aggregate with an expanded fine lightweight aggregate (LWA). For this study, the free ...


Numerical And Experimental Studies Of Transmission Lines Subjected To Tornadoes, Ahmed Hamada 2014 Western University

Numerical And Experimental Studies Of Transmission Lines Subjected To Tornadoes, Ahmed Hamada

University of Western Ontario - Electronic Thesis and Dissertation Repository

The majority of worldwide weather-related transmission line failures have been attributed to High Intensity Wind (HIW) events in the form of tornadoes and downbursts. The research conducted in the current thesis presents a significant development in the understanding of the structural behaviour of transmission line systems under tornado loading. A comprehensive in-house numerical model that combines the data of computational fluid dynamic (CFD) simulations of tornado wind fields with three dimensional nonlinear structural analysis modelling is developed. A three dimensional four-nodded cable element is first formulated to simulate the nonlinear large deformation behaviour of the conductors. The support provided to ...


Roundabout Maintenance Manual, Emily A. Bonini, Pat Conner P.E., John Haddock PhD, P.E., Yu Tian 2014 Purdue University

Roundabout Maintenance Manual, Emily A. Bonini, Pat Conner P.E., John Haddock Phd, P.E., Yu Tian

The Summer Undergraduate Research Fellowship (SURF) Symposium

In recent years, roundabouts have been rapidly growing in popularity. As a result, many communities are installing them in their roadways; however, they are encountering difficulties in maintaining them. Uneducated workers can cause damage to roundabouts and to themselves, costing cities time and money. This project aims to create a guide for communities new to roundabouts in order to reduce damages and unnecessary maintenance costs. Data was gathered by determining the most common maintenance questions and problems along with what information was already available on roundabout maintenance. Next, agencies most experienced with roundabouts were surveyed on the best maintenance practices ...


Finite Element Analysis Of Bolted Connections Under Fire, Ke Liu, Qiaqia Zhu, Amit H. Varma 2014 Purdue University

Finite Element Analysis Of Bolted Connections Under Fire, Ke Liu, Qiaqia Zhu, Amit H. Varma

The Summer Undergraduate Research Fellowship (SURF) Symposium

Over the course of human history, fire disasters are one of the major catastrophes that causes loss of lives and properties. In order to ensure building safety against fire, civil engineers seek to understand the behavior of structures at high temperatures. Moreover, they need to study the behavior of bolted connections, given the important role it plays in steel structures. Sarraj (2007) proposed a plate-bearing computational model used to describe this behavior; however, it has never been experimentally verified. Prior to this specific project, a series of single-bolted connection tests at 400°C and 600°C were conducted in the ...


A Wind-Derived Upwelling Index For Lake Michigan, Stephen B. Davis, Rebecca Essig, Cary Troy 2014 Purdue University

A Wind-Derived Upwelling Index For Lake Michigan, Stephen B. Davis, Rebecca Essig, Cary Troy

The Summer Undergraduate Research Fellowship (SURF) Symposium

Coastal upwelling is a phenomenon that occurs along coastlines throughout the world, and has been shown to be strongly correlated with large fish populations in these areas. Coastal upwelling occurs when strong coastal winds drive water transport away from the coast, causing colder, often nutrient-rich water to upwell in its place. While coastal upwellings can be detected with satellite imagery or in situ temperature measurements, these datasets are neither continuous nor long-term. A wind-derived upwelling index was created for Lake Michigan to continuously quantify upwellings over multiple decades, and to allow for further understanding of the impact of upwelling in ...


Bio-Inspired Helicoidal Composites: 3d Printing And Experiments, Michael E. Jones, Pablo Zavattieri, Nobphadon Suksangpanya 2014 Purdue University

Bio-Inspired Helicoidal Composites: 3d Printing And Experiments, Michael E. Jones, Pablo Zavattieri, Nobphadon Suksangpanya

The Summer Undergraduate Research Fellowship (SURF) Symposium

Materials that are impact resistant enough for personal protection in sports, transport, and combat are not also lightweight, strong, tough, and impact tolerant. Nature can provide inspiration for novel materials that can meet these needs. The hierarchical composite of the stomatopod’s, or mantis shrimp’s, dactyl club has been shown to have high impact resistance and damage tolerance due to its helicoidal fiber reinforcement(1,2). Analyzing helicoidal composites of different pitch angles (angles between adjacent rows of fibers) under quasi-static, displacement-controlled loading has provided insights into the fracture mechanisms of the composite structure and how they affect the ...


Comparison Of The Accuracy Of Traffic Counting Devices, Rodrigo Netto de Souza, Laura Slusher ,P.E. 2014 Purdue University

Comparison Of The Accuracy Of Traffic Counting Devices, Rodrigo Netto De Souza, Laura Slusher ,P.E.

The Summer Undergraduate Research Fellowship (SURF) Symposium

Traffic counting devices are commonly used by governmental agencies and private companies in order to assess traffic patterns and the level of occupancy of roadway networks. The data provided by these devices normally encompasses traffic volumes, vehicle classes and vehicle speeds, and are used by traffic engineers in the planning, design and operations of transportation systems. An evaluation of the accuracy of these devices is of great importance because traffic management decisions are compromised without qualified data. This research evaluated the performance of two different models of traffic counters, Jamar Technologies’ Radar Recorder and Vaisala’s Traffic Analyzer NC-200, both ...


Laser-Based Structural Sensing And Surface Damage Detection, Burcu Guldur, Jerome F. Hajjar 2014 Northeastern University

Laser-Based Structural Sensing And Surface Damage Detection, Burcu Guldur, Jerome F. Hajjar

Department of Civil and Environmental Engineering Reports

Damage due to age or accumulated damage from hazards on existing structures poses a worldwide problem. In order to evaluate the current status of aging, deteriorating and damaged structures, it is vital to accurately assess the present conditions. It is possible to capture the in situ condition of structures by using laser scanners that create dense three-dimensional point clouds. This research investigates the use of high resolution three-dimensional terrestrial laser scanners with image capturing abilities as tools to capture geometric range data of complex scenes for structural engineering applications. Laser scanning technology is continuously improving, with commonly available scanners now ...


A Validated Approach To Modeling Collapse Of Steel Structures, V. V. Saykin, J. Song, J. F. Hajjar 2014 Northeastern University

A Validated Approach To Modeling Collapse Of Steel Structures, V. V. Saykin, J. Song, J. F. Hajjar

Department of Civil and Environmental Engineering Reports

A civil engineering structure is faced with many hazardous conditions such as blasts, earthquakes, hurricanes, tornadoes, floods, and fires during its lifetime. Even though structures are designed for credible events that can happen during a lifetime of the structure, extreme events do happen and cause catastrophic failures. Understanding the causes and effects of structural collapse is now at the core of critical areas of national need. One factor that makes studying structural collapse difficult is the lack of full-scale structural collapse experimental test results against which researchers could validate their proposed collapse modeling approaches. The goal of this work is ...


Geospatial Analysis Of Rural Motor Vehicle Traffic Crashes In Oregon, Saad Nayef AlMutairi 2014 Portland State University

Geospatial Analysis Of Rural Motor Vehicle Traffic Crashes In Oregon, Saad Nayef Almutairi

Civil and Environmental Engineering Master's Project Reports

This research examines the spatial extent of crashes in and around city boundaries in the state of Oregon in the U.S.A. For this study, summary of fatalities data for the year 2006 obtained from NHTSA’s report (2009), crash data for the year 2012, and city boundaries were obtained from ODOT “Oregon Department of Transportation” FTP: www.odot.state.or.us. In order to differentiate between the urban and rural crashes, city boundaries were used to find the numbers of urban and rural crashes. Outside areas of this urban-rural boundary were divided into further boundaries of 2.5 ...


Reaction Engineering Routes To Waste Gasification For Sustainable Living Environments, Stephen A. Reeves, Mohammed S. Suleiman, Joshua M. Cmar, Jorge E. Gatica 2014 Cleveland State University

Reaction Engineering Routes To Waste Gasification For Sustainable Living Environments, Stephen A. Reeves, Mohammed S. Suleiman, Joshua M. Cmar, Jorge E. Gatica

Undergraduate Research Posters 2014

There is an increasing pressure to reduce waste generation and dependence upon fossil fuels in our society. The approach investigated in this project aims to address both concerns by formulating a low-temperature gasification process to process long-chain polymers typically found in municipal waste. Gasification routes which convert plastic and bio-waste into useful fuel syngas products has been extensively investigated. The novelty of the approach examined here consists on the use of a variety of catalysts, which can promote high conversion in gasification reactions at much lower temperature and pressure conditions. This route overcomes some of the financial and environmental shortcomings ...


Failures Of Mainline Railway Sleepers And Suggested Remedies-Review Of Current Practice, Wahid Ferdous 2014 SelectedWorks

Failures Of Mainline Railway Sleepers And Suggested Remedies-Review Of Current Practice, Wahid Ferdous

Wahid Ferdous

Over the last two decades, the premature failures of traditional railway sleepers have significantly increased the track maintenance costs. The primary obstacle to minimising this problem is the lack of understanding of the mechanism of sleeper degradation. This paper discusses the different deterioration mechanisms for traditional timber, concrete and steel sleepers and the potential protective measures to minimise these problems. This paper exhaustively reviews the failure mechanisms of these three commonly used sleeper materials with suggested solutions. Fungal decay, end splitting and termite attacks has been identified as the principal causes of timber sleeper failures. On the other hand, concrete ...


Statewide Heavy-Truck Crash Assessment, Zachary Hans, Konstantina Gkritza, Donald Cerwick, Yundi Huang, Inya Nlenanya 2014 Iowa State University

Statewide Heavy-Truck Crash Assessment, Zachary Hans, Konstantina Gkritza, Donald Cerwick, Yundi Huang, Inya Nlenanya

InTrans Project Reports

In 2010, 16.5 percent of all fatal vehicle crashes in Iowa involved large trucks compared to the national average of 7.8 percent. Only about 16 percent of these fatalities involved the occupants of the heavy vehicles, meaning that a majority of the fatalities in fatal crashes involve non-heavy-truck occupants. These statistics demonstrate the severe nature of heavy-truck crashes and underscore the serious impact that these crashes can have on the traveling public. These statistics also indicate Iowa may have a disproportionately higher safety risk compared to the nation with respect to heavy-truck safety. Several national studies, and a ...


Statewide Heavy-Truck Crash Assessment -- Tech Transfer Summary, Zachary Hans, Konstantina Gkritza 2014 Iowa State University

Statewide Heavy-Truck Crash Assessment -- Tech Transfer Summary, Zachary Hans, Konstantina Gkritza

Tech Transfer Summaries

In 2010, 16.5 percent of all fatal vehicle crashes in Iowa involved large trucks compared to the national average of 7.8 percent. Only about 16 percent of these fatalities involved the occupants of the heavy vehicles, meaning that a majority of the fatalities in fatal crashes involve non-heavy-truck occupants. These statistics demonstrate the severe nature of heavy-truck crashes and underscore the serious impact that these crashes can have on the traveling public. These statistics also indicate Iowa may have a disproportionately higher safety risk compared to the nation with respect to heavy-truck safety. Several national studies, and a ...


Probabilistic Modeling And Bayesian Inference Of Metal-Loss Corrosion With Application In Reliability Analysis For Energy Pipelines, Hao Qin 2014 Western University

Probabilistic Modeling And Bayesian Inference Of Metal-Loss Corrosion With Application In Reliability Analysis For Energy Pipelines, Hao Qin

University of Western Ontario - Electronic Thesis and Dissertation Repository

The stochastic process-based models are developed to characterize the generation and growth of metal-loss corrosion defects on oil and gas steel pipelines. The generation of corrosion defects over time is characterized by the non-homogenous Poisson process, and the growth of depths of individual defects is modeled by the non-homogenous gamma process (NHGP). The defect generation and growth models are formulated in a hierarchical Bayesian framework, whereby the parameters of the models are evaluated from the in-line inspection (ILI) data through the Bayesian updating by accounting for the probability of detection (POD) and measurement errors associated with the ILI data. The ...


Evaluation Of Truck Signal Priority At N Columbia Blvd And Martin Luther King Jr. Blvd Intersection, Maisha Mahmud 2014 Portland State University

Evaluation Of Truck Signal Priority At N Columbia Blvd And Martin Luther King Jr. Blvd Intersection, Maisha Mahmud

Civil and Environmental Engineering Master's Project Reports

Given the importance of over growing freight transportation system worldwide, engineers and planners are faced with the challenge of improving freight service in urban area using low cost measure. Truck Signal Priority is one of the strategy that can be used to improve operational efficiency with enhance safety benefits (red light running) of freight service, without major capital investment. In light to this interest this study focus on evaluating the impacts of freight signal priority on a high truck density intersection like N Columbia Blvd and NE Martin Luther King Jr. Blvd. Using a simulation tool, VISSIM, these impacts were ...


Wind-Induced Pressures In Air Permeable, Double-Layer Roof Systems In Regions Of Separated Flow, Jeong Hee Oh 2014 Western University

Wind-Induced Pressures In Air Permeable, Double-Layer Roof Systems In Regions Of Separated Flow, Jeong Hee Oh

University of Western Ontario - Electronic Thesis and Dissertation Repository

This thesis is concerned with the wind-induced pressure distribution acting on air permeable, double-layer roof systems placed on low-rise buildings. Because of the pressure transmission into the cavity between layers, the pressure difference in the double-layer systems differs significantly from that in a single layer. The interior pressures (in the cavity between layers) are highly correlated with external pressures at the openings on the external surface of the outer layer and thereby, the net wind load for the design of the outer layer is considerably reduced by the pressure equalization between the external and internal surfaces of the outer layer ...


Solid-Phase Extraction As Sample Preparation For Bioassay-Based Micropollutant Quantification, Chen Feng 2014 Western University

Solid-Phase Extraction As Sample Preparation For Bioassay-Based Micropollutant Quantification, Chen Feng

University of Western Ontario - Electronic Thesis and Dissertation Repository

Solid phase extraction (SPE) using chemically bonded silica particles or small particles of an organic polymer resin, is being studied extensively for extraction of polar or non-polar compounds from various water matrices. This study focused on the evaluation of the performance of three commercial cartridges belonging to three different groups: reversed-phase, mixed-mode anion exchanger and mixed-mode cation exchanger. In the first stage of research, the performance of three cartridges was compared by extracting four antibiotics with different physic-chemical properties from water samples. The results obtained from column sorption experiments were plotted into breakthrough curves and batch equilibrium experiments results were ...


Digital Commons powered by bepress