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

Civil Engineering Commons

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

8,955 Full-Text Articles 10,714 Authors 4,135,161 Downloads 119 Institutions

All Articles in Civil Engineering

Faceted Search

8,955 full-text articles. Page 258 of 262.

Route Choice Behavior In A Driving Simulator With Real-Time Information, Hengliang Tian 2010 University of Massachusetts Amherst

Route Choice Behavior In A Driving Simulator With Real-Time Information, Hengliang Tian

Masters Theses 1911 - February 2014

This research studies travelers' route choice behavior in a driving simulator with real-time information en-route. We investigate whether travelers plan strategically for real-time information en-route or simply select a fixed path from origin to destination at the beginning of a trip, and whether network complexity and a parallel driving task affect subjects' strategic thinking ability. In this study, strategic thinking refers to a traveler's route choice decision taking into account future diversion possibilities downstream enabled by information at the diversion node. All of the subjects in this study participated in driving-simulator-based tests while half of the subjects participated in ...


Historic Bridge Evaluation Using Finite Element Techniques, Helena M. Charron 2010 University of Massachusetts Amherst

Historic Bridge Evaluation Using Finite Element Techniques, Helena M. Charron

Masters Theses 1911 - February 2014

The present study examined the application of modern, computer-based analysis methods to two existing historic bridges in Massachusetts. The first bridge featured in this study is the Woronoco Bridge, a reinforced concrete open spandrel arch bridge that was constructed in 1923. It was hoped that a computer-based, parametric study of this bridge would prove it to be deck-stiffened, similar to select bridges of Swiss engineer Robert Maillart. However, the results do not support that there was any intent to reduce bending in the arch as a result of increasing the stiffness of the bridge deck. Instead, the Woronoco Bridge appears ...


The Effectiveness Of The Natural Resource Conservation Service (Nrcs) And Huff Rainfall Distribution Methods For Use In Detention Basin Design, Todd Wayne Dablemont 2010 Missouri University of Science and Technology

The Effectiveness Of The Natural Resource Conservation Service (Nrcs) And Huff Rainfall Distribution Methods For Use In Detention Basin Design, Todd Wayne Dablemont

Masters Theses

"This thesis focuses on the effectiveness of the NRCS and Huff rainfall distribution methods for use in detention basin design. This study required the use of HEC-HMS, hydrologic modeling software, in order to analyze the distribution methods. Three separate detention basins and their watersheds were modeled for this study. The watersheds were analyzed for both undeveloped and developed conditions. The parameters analyzed include detention basin inflow, detention basin outflow, watershed peak discharge, and detention basin storage capacity. The determination of detention basin effectiveness was based upon these parameters. The NRCS distribution method is widely used; however, many who use it ...


Corrosion Resistance Of Enamel-Coated Steel Reinforcement For Concrete, Charles Robert Werner 2010 Missouri University of Science and Technology

Corrosion Resistance Of Enamel-Coated Steel Reinforcement For Concrete, Charles Robert Werner

Masters Theses

"Originally developed to enhance the bond between concrete and steel, reactive enamel coatings have shown great promise in protecting steel from corrosive environments. However, the corrosion resistance of the material has not yet been tested beyond 40 days. Moreover, when the material was tested, it was applied to smooth steel pins, not deformed steel bars which are commonly used in reinforced concrete structures. Therefore, this study focused on the corrosion resistance of three different enamel coatings, along with a standard epoxy coating, each of which were applied to both smooth and deformed steel bars and included both short-term and long-term ...


Determining The R Values For 12 Inch Deep Z-Purlins And Girts With Through-Fastened Panels Under Suction Loading, Kaye Dee Wibbenmeyer 2010 Missouri University of Science and Technology

Determining The R Values For 12 Inch Deep Z-Purlins And Girts With Through-Fastened Panels Under Suction Loading, Kaye Dee Wibbenmeyer

Masters Theses

"Designing purlins for roof systems attached to through-fastened panels has been a subject well researched in the past. The current design specification uses a simplified approach to the designing of these members where the fully braced moment capacity of such members is multiplied by a reduction factor, commonly referred to as the R-value. This value represents the point in between the fully braced and fully unbraced member behavior. However, the current AISI Specification, S100, only contains R-values for purlins and girts up to 11.5 inches in depth. Since manufacturers are now rolling sections up to 12 inches deep, two ...


Nonlinear Finite Element Formulation Of The Soil Structure Interaction Through Two Parameter Foundation Model, Taraka Ravi Shankar Mullapudi 2010 Missouri University of Science and Technology

Nonlinear Finite Element Formulation Of The Soil Structure Interaction Through Two Parameter Foundation Model, Taraka Ravi Shankar Mullapudi

Masters Theses

"The response of shallow and raft foundations is having a significant importance due to its complex behavior because of the semi-infinite soil media. Winkler's model is the simplest model to deal with the structure and soil. The Winkler model represents the foundation reaction as proportional to the soil displacement at a particular point, which results in the elasticity of the soil being the only parameter in consideration. But in reality the soil cohesiveness is having a significant contribution in soil structure interaction, and therefore the consideration of coupling effects of Winkler springs need to be accounted. Most of the ...


Behavior Of Externally Bonded Fiber Reinforced Polymer Systems For Strengthening Concrete Girders In Shear, Michael Shawn Murphy 2010 Missouri University of Science and Technology

Behavior Of Externally Bonded Fiber Reinforced Polymer Systems For Strengthening Concrete Girders In Shear, Michael Shawn Murphy

Doctoral Dissertations

"Deficiencies in shear resistance are a primary concern in concrete members due to the sudden and unpredictable nature of shear failures. Shear deficiencies in concrete structures can arise due to improper design, long-term deterioration, man-made damages, increases in loads, or as a result of over strengthening in flexure. A number of shear strengthening techniques offer a cost effective means for restoring or enhancing the shear capacity of a concrete member. The use of externally bonded fiber reinforced polymers (FRP) is one such technique that has gained recent recognition for its high strength-to-weight ratio and simplicity of application. The development of ...


Field Investigation Of Spalling In Bridge Decks With Partial-Depth Precast Concrete Panel Systems Using Non-Destructive Testing, Kandi Rebecca Wieberg 2010 Missouri University of Science and Technology

Field Investigation Of Spalling In Bridge Decks With Partial-Depth Precast Concrete Panel Systems Using Non-Destructive Testing, Kandi Rebecca Wieberg

Masters Theses

"This study involved the investigation of the causes of spalling observed in several partial-depth precast prestressed bridge decks in the state of Missouri. Recently it has been observed that several bridges in Missouri with this type of construction have experienced spalling of concrete at the edges of the panels revealing an extreme condition of corrosion in the prestressing tendons, some to the point of rupture. Ground penetrating radar (GPR), which has been shown to be successful in bridge deck evaluation, was used to determine the relative condition of the prestressing tendons as well as the relative condition of the concrete ...


A New Congested Traffic Load Model For Highway Bridges, Colin C. Caprani, Colm Carey, Bernard Enright 2010 Technological University Dublin

A New Congested Traffic Load Model For Highway Bridges, Colin C. Caprani, Colm Carey, Bernard Enright

Conference papers

Long span highway bridges are critical components of any nation’s infrastructure. Therefore accurate assessment of highway bridge loading is essential, and it is well known that congested traffic governs load effect for such bridges. Current congestion models use conservative assumptions about traffic and inter-vehicle gaps. This research investigates congested traffic flow through the use of traffic microsimulation which has the ability to reproduce complex traffic phenomena based on driver interactions. A time series model has been developed to produce a speed time-series similar to the results of the microsimulation. The speed time-series from the new model, combined with the ...


Characteristic Dynamic Increment For Extreme Traffic Loading Events On Short And Medium Span Highway Bridges, Eugene J. OBrien, Daniel Cantero, Bernard Enright, Arturo González 2010 University College Dublin

Characteristic Dynamic Increment For Extreme Traffic Loading Events On Short And Medium Span Highway Bridges, Eugene J. Obrien, Daniel Cantero, Bernard Enright, Arturo González

Articles

More accurate assessment of safety can prevent unnecessary repair or replacement of existing bridges which in turn can result in great cost savings at network level. The allowance for dynamics is a significant component of traffic loading in many bridges and is often unnecessarily conservative. Critical traffic loading scenarios are considered in this paper with a model that allows for vehicle-bridge interaction and takes into account the road surface condition. Characteristic dynamic allowance values are presented for the assessment of mid-span bending moment in a wide range of short to medium span bridges for bi-directional traffic.


Importance Of The Tail In Truck Weight Modeling For Bridge Assessment, Eugene J. OBrien, Bernard Enright, Abraham Getachew 2010 University College Dublin

Importance Of The Tail In Truck Weight Modeling For Bridge Assessment, Eugene J. Obrien, Bernard Enright, Abraham Getachew

Articles

To predict characteristic extreme traffic load effects, simulations are sometimes performed of bridge loading events. To generalize the truck weight data, statistical distributions are fitted to histograms of weight measurements. This paper is based on extensive WIM measurements from two European sites and shows the sensitivity of the characteristic traffic load effects to the fitting process. A semi-parametric fitting procedure is proposed: direct use of the measured histogram where there are sufficient data for this to be reliable and parametric fitting to a statistical distribution in the tail region where there are less data. Calculated characteristic load effects are shown ...


Management Strategies For Special Permit Vehicles For Bridge Loading, Bernard Enright, Eugene J. OBrien 2010 Technological University Dublin

Management Strategies For Special Permit Vehicles For Bridge Loading, Bernard Enright, Eugene J. Obrien

Conference papers

An examination of weigh-in-motion data collected recently at sites in five European countries has shown that vehicles with weights well in excess of the normal legal limits are found on a daily basis. These vehicles would be expected to have permits issued by the responsible authorities. It can be seen from the measurements that most of them are travelling at normal speeds. Photographic evidence indicates that, while many are accompanied by an escort vehicle, normal traffic is flowing alongside in other lanes. As European freight volume grows, the frequency of these special vehicles can be expected to increase. Hence, the ...


Site Specific Modelling Of Traffic Loading On Highway Bridges, Bernard Enright, Eugene J. OBrien 2010 Technological University Dublin

Site Specific Modelling Of Traffic Loading On Highway Bridges, Bernard Enright, Eugene J. Obrien

Conference papers

Accurate traffic loading models based on measured weigh-in-motion (WIM) data are essential for the accurate assessment of existing bridges. Much work has been published on the Monte Carlo simulation of single lanes of heavy vehicle traffic, and this can easily be extended to model the loading on bridges with two streams of traffic in opposing directions. However, a typical highway bridge will have multiple lanes in the same direction, and various types of correlation are evident in measured traffic, such as groups of very heavy vehicles travelling together and heavy vehicles being overtaken by lighter ones. These traffic patterns affect ...


The Influence Of Correlation On The Extreme Traffic Loading Of Bridges, Eugene J. OBrien, Bernard Enright, A. T. Dempsey 2010 University College Dublin

The Influence Of Correlation On The Extreme Traffic Loading Of Bridges, Eugene J. Obrien, Bernard Enright, A. T. Dempsey

Conference papers

Accurate traffic loading models based on measured data are essential for the accurate assessment of existing bridges. There are well-established methods for the Monte Carlo simulation of single lanes of traffic, and this can easily be extended to model the loading on bridges with two independent streams of traffic in opposing directions. However, a typical highway bridge will have multiple lanes in the same direction, and various types of correlation are evident in measured traffic. This paper analyses traffic patterns using multi-lane WIM data collected at two European sites. It describes an approach to the Monte Carlo simulation of this ...


Visualization And Assessment Of Arterial Progression Quality Using High Resolution Signal Event Data And Measured Travel Time, Christopher M. Day, Ross Haseman, Hiromal Premachandra, Thomas M. Brennan Jr, Jason S. Wasson, James R. Sturdevant, Darcy M. Bullock 2010 Purdue University

Visualization And Assessment Of Arterial Progression Quality Using High Resolution Signal Event Data And Measured Travel Time, Christopher M. Day, Ross Haseman, Hiromal Premachandra, Thomas M. Brennan Jr, Jason S. Wasson, James R. Sturdevant, Darcy M. Bullock

Lyles School of Civil Engineering Faculty Publications

No abstract provided.


On The Use Of Polyurethane Matrix Carbon Fiber Composites For Strengthening Concrete Structures, Zachary Haber 2010 University of Central Florida

On The Use Of Polyurethane Matrix Carbon Fiber Composites For Strengthening Concrete Structures, Zachary Haber

Electronic Theses and Dissertations

Fiber-reinforced polymer (FRP) composite materials have effectively been used in numerous reinforced concrete civil infrastructure strengthening projects. Although a significant body of knowledge has been established for epoxy matrix carbon FRPs and epoxy adhesives, there is still a need to investigate other matrices and adhesive types. One such matrix/adhesive type yet to be heavily researched for infrastructure application is polyurethane. This thesis investigates use of polyurethane matrix carbon fiber composites for strengthening reinforced concrete civil infrastructure. Investigations on mirco- and macro-mechanical composite performance, strengthened member flexural performance, and bond durability under environmental conditioning will be presented. Results indicate that ...


Using Carrying Capacity As A Baseline For Building Sustainability Assessment, Michael Bendewald 2010 University of Colorado at Boulder

Using Carrying Capacity As A Baseline For Building Sustainability Assessment, Michael Bendewald

Civil Engineering Graduate Theses & Dissertations

This thesis critically reviews existing building environmental assessment methods and provides a computational model that can help address some of their shortcomings. Since building environmental assessment methods are having a huge impact on the way buildings are valued, it is increasingly important that the methods appropriately assess building sustainability. Many critics of the assessment methods argue that the methods should evolve toward an “absolute” assessment of sustainability. That is, rather than assessing a building relative to a typical building, the assessment should be made to whatever is deemed sustainable. One possible form of absolute assessment is using the indicator of ...


Impact Of Effluent Organic Matter On The Application Of Ozone For Treatment Of Organic Contaminants From Wastewater, Sarah Gonzales 2010 University of Colorado at Boulder

Impact Of Effluent Organic Matter On The Application Of Ozone For Treatment Of Organic Contaminants From Wastewater, Sarah Gonzales

Civil Engineering Graduate Theses & Dissertations

The application of ozone for the advanced treatment of wastewater effluents is currently being evaluated throughout the world. Application of ozone to wastewater results in disinfection and significant oxidation of emerging contaminants of concern, including pharmaceuticals and personal care products. The impact of wastewater derived effluent organic matter (EfOM) on the application of ozone for the oxidation of organic contaminants was evaluated for four wastewaters (sites A, B, C1 and C2). Specifically, the ozone decomposition and concurrent formation of hydroxyl radical (HO•) from EfOM as a function of apparent molecular weight (AMW). Each collected water was fractionated into four fractions ...


A Research Synthesis On The Interface Between Lean Construction And Safety Management, Eric Israel Antillón 2010 University of Colorado at Boulder

A Research Synthesis On The Interface Between Lean Construction And Safety Management, Eric Israel Antillón

Civil Engineering Graduate Theses & Dissertations

Applying lean construction to safety management efforts is a promising research area and has been discussed widely in the construction community. Some researchers believe that the reduction of occupational hazards is a naturally occurring effect of the implementation of lean practices. Lean focuses on the reduction of waste and poor safety can be considered a source of waste. To further understand how lean practices affect project safety performance, an interaction matrix between lean construction and safety management practices was developed by performing a research synthesis, which was also validated by conducting structured interviews. The variables analyzed in this interaction matrix ...


Development Of An Ultraviolet Point-Of-Use Device For Household Disinfection, Christina Kay Barstow 2010 University of Colorado at Boulder

Development Of An Ultraviolet Point-Of-Use Device For Household Disinfection, Christina Kay Barstow

Civil Engineering Graduate Theses & Dissertations

Point-of-use (POU) disinfection systems have the ability to provide safe drinking water to the millions who lack access to an improved water source. While many POU systems exist in developing communities, there are several concerns that lead to low user acceptability. Concerns include low flow rates, taste and odor issues, high costs, recontamination and ineffectiveness at treating common pathogenic organisms. In response to these concerning issues, an ultraviolet (UV) POU system has been developed consisting of developing community appropriate materials (recycled plastics, recycled aluminum, etc.) and simple construction techniques based around the use of a low-wattage, low pressure UV bulb ...


Digital Commons powered by bepress