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Articles 211 - 240 of 281
Full-Text Articles in Civil Engineering
Ie Tools In Construction - Small Tools Spreadsheet, Ronald Goodson
Ie Tools In Construction - Small Tools Spreadsheet, Ronald Goodson
All Theses
This document will explore the development and implementation of a spreadsheet tool that will provide for effective planning, procurement, and management of 'small tools' on a construction site - small tools are relatively inexpensive items that are usually handheld. The following five chapters cover the development of the spreadsheet. Both methodology and the calculation process are explored in detail and all facets of the spreadsheet are explained. A key component of the development process is that end users were involved in the entire development process to ensure the spreadsheet met their needs. In general, users input several criteria regarding work …
Performance Evaluation Of Sbs Modified Asphalt Mixtures Using Warm Mix Technologies, Hakseo Kim
Performance Evaluation Of Sbs Modified Asphalt Mixtures Using Warm Mix Technologies, Hakseo Kim
All Theses
The need for more sustainable methods and techniques in industry has been increasing and it is important to respond to the needs of society and address issues surrounding its environment and health. In order to better introduce such new and more sustainable methods, it is necessary to combine existing and proven methods with new technology. The main idea of this research was to use the established industry standard of using Styrene Butadiene Styrene (SBS) modified binder and combine it with the relatively new Warm Mix Asphalt (WMA) technology in order to create a more sustainable and eco-friendly asphalt paving process. …
Analytical Seismic Fragility Curves For Skewed Multi-Span Steel Girder Bridges, Ian Sullivan
Analytical Seismic Fragility Curves For Skewed Multi-Span Steel Girder Bridges, Ian Sullivan
All Theses
Most of the past seismic fragility studies on typical highway bridges in the Central and Southeastern United States (CSUS) have focused on regular multi-span bridges with little to no skew. However, past earthquakes and studies have shown that skewed multi-span simply supported bridges may also be susceptible to earthquake damage, specifically causing coupled responses (longitudinal and transverse) that place more demand on individual components. With over 27 percent of simply supported steel girder highway bridges in the CSUS having a skew angle over 15 degrees, there is a specific need to further quantify the vulnerability of such bridges exposed to …
Comparision Of Open Graded Friction Course Mix Design Methods Currently Used In The United States, Laura Kline
Comparision Of Open Graded Friction Course Mix Design Methods Currently Used In The United States, Laura Kline
All Theses
This research compares the open graded friction course (OGFC) mix design methods which are currently being used in the United States. OGFCs are a type of porous pavement that have been used in the United States since 1944, but has provided inconsistent and highly variable performance results. The design procedures for several agencies were obtained, and then compared for similarities. All of the design methods were then conducted to determine the optimum binder content. The optimum binder content (OBC) of a single aggregate gradation for each method was tested for properties and performance characteristics.
The design methods which are currently …
Influence Of Shear Key Performance On The Fatigue Life Of Adjacent Beam Bridges, Sara Roberts
Influence Of Shear Key Performance On The Fatigue Life Of Adjacent Beam Bridges, Sara Roberts
All Theses
Adjacent beam bridges, such as box beams and hollow core bridges have been one of the most popular forms of precast prestressed bridges in the past. Recently, an awareness of major durability problems has led owners to make improvements to the old standards or move away from the system completely. These issues usually stem from the breakdown of the shear key which provides continuity between adjacent members. This research focuses on determining the best improvements that will reduce durability issues and increase the bridge's service life.
A review of previous research performed on adjacent beam bridges is performed, focusing on …
Identifying And Comparing Key Process Attributes For Sustainable Building Delivery In India And The U.S., Prashanth Palanisamy
Identifying And Comparing Key Process Attributes For Sustainable Building Delivery In India And The U.S., Prashanth Palanisamy
All Theses
India is a rapidly developing nation with the associated brisk pace of construction. More sustainable building practices for construction in India would have social, environmental, and economic benefits. However, the key process attributes for successfully planning, designing, and constructing sustainable buildings in India are largely undefined. Other projects in India would benefit from a rigorous identification of these key process attributes which could help leapfrogging the sustainable building delivery in India to the best available practices.
Sustainable buildings require different delivery processes than traditional buildings; this can lead to process wastes due to unfamiliarity or incompatibility of the processes. These …
Comparing Problem-Based Learning And Lecture As Methods To Teach Whole-Systems Design To Engineering Students, Michael Dukes
Comparing Problem-Based Learning And Lecture As Methods To Teach Whole-Systems Design To Engineering Students, Michael Dukes
All Theses
The objective of this research is to compare problem-based learning and lecture as methods to teach whole-systems design to engineering students. A case study, Appendix A, exemplifying successful whole-systems design was developed and written by the author in partnership with the Rocky Mountain Institute. Concepts to be tested were then determined, and a questionnaire was developed to test students' preconceptions. A control group of students was taught using traditional lecture methods, and a sample group of students was taught using problem-based learning methods. After several weeks, the students were given the same questionnaire as prior to the instruction, and the …
Vehicle-Infrastructure Integration (Vii) Enabled Plug-In Hybrid Electric Vehicles (Phevs) For Traffic And Energy Management, Xueying Kang
Vehicle-Infrastructure Integration (Vii) Enabled Plug-In Hybrid Electric Vehicles (Phevs) For Traffic And Energy Management, Xueying Kang
All Theses
Vehicle Infrastructure Integration (VII) program (also known as IntelliDrive) has proven the potential to improve transportation conditions by enabling the communication between vehicles and infrastructure, which provides a wide range of applications in transportation safety and mobility. Plug-in hybrid electric vehicles (PHEVs) that utilize both electrical and gasoline energy are a commercially viable technology with potential to contribute to both sustainable development and environmental conservation through increased fuel economy and reduced emissions. Considering positive potentials of PHEVs and VII in ITS, a framework that integrates PHEVs with VII technology was created in this research utilizing vehicle-to-vehicle and vehicle-to-infrastructure communications for …
Evaluation Of An Online Intelligent Transportation System (Its) Asset Management System, Tahera Anjuman
Evaluation Of An Online Intelligent Transportation System (Its) Asset Management System, Tahera Anjuman
All Theses
Intelligent Transportation System (ITS) enhances the performance of modern transportation systems by improving the reliability of travel times and reducing the risk of collisions and injuries. Recently, many public agencies have expressed a need for an ITS asset management system that will effectively and efficiently meet their requirements of managing associated resources, which often includes technologically sophisticated devices, computer hardware and software, and communications infrastructure. To address this need, the author evaluated different asset management systems for their potential efficacy to support public agencies requirements for an ITS asset management system. These requirements were identified through a nationwide survey of …
Analysis Of Factors Contributing To Roadside Tree Crashes In South Carolina, Vijay Bendigeri
Analysis Of Factors Contributing To Roadside Tree Crashes In South Carolina, Vijay Bendigeri
All Theses
The state of South Carolina has experienced a large number of fatalities and injuries resulting from run off the road tree related crashes. According to 2008 FARS data tree related fixed object fatal crashes in South Carolina (65%) are more than double that of the national (25.8%). Thus, trees are much bigger proportion of all roadside hazards in South Carolina than nationally. In order to achieve a safer roadside which is favorable to the road user, factors contributing to the tree related crashes should be critically analyzed to determine suitable safety improvements.
This research aims at qualitatively and quantitatively assessing …
Moisture Susceptibility Of Asphalt Mixes Using Phosphonylated Recycled Polyethylene, David Herndon
Moisture Susceptibility Of Asphalt Mixes Using Phosphonylated Recycled Polyethylene, David Herndon
All Dissertations
ABSTRACT
Today's asphaltic concrete pavements are expected to perform better even though they are experiencing increased volume of traffic and increased loads over what has been experienced in the past. Research has indicated that the addition of polymers to asphalt binders can enhance many properties of the asphalt pavements to help meet these increased demands.
There remains a serious problem that the addition of polymers to asphalt binders generally does not address. This involves the interfacial cohesiveness of the bond between the aggregate and the binder. Some aggregates are highly hydrophilic (water-loving) while asphalt binders and most polymers tend to …
Synthesis Of Optimal Usage Of Available Aggregates In Highway Construction And Maintenance, Benjamin Skidmore
Synthesis Of Optimal Usage Of Available Aggregates In Highway Construction And Maintenance, Benjamin Skidmore
All Theses
The optimization of the available aggregates for highway construction and maintenance is vital both from an economic and environmental perspective. By not optimizing the aggregate supply project costs escalate as a simple response to supply and demand, and just as important the fact that aggregate is a natural resource and a limited one, it is crucial that is used as efficiently as possible. This paper examines specifically the use of aggregates by the South Carolina Department of Transportation, but can easily be adapted to any state. Through DOT and quarry surveys and an examination of aggregate gradation specifications it was …
Operation Assessment Of Reservoirs In The Savannah River Basin, Travis Yates
Operation Assessment Of Reservoirs In The Savannah River Basin, Travis Yates
All Theses
Hydropower is generated from three reservoirs in the United States Army Corps of Engineer's Savannah District. These reservoirs include J. Strom Thurmond, Richard B. Russell, and Hartwell. Currently, a contract in place specifies that certain amount of energy must be provided to the region. The contract for the hydropower was based upon the critical hydrologic year of 1981. Historically, this was the most severe drought on record and assumed to provide the lowest net inflows for the three reservoirs, thus providing an attainable or reliable energy amount for the system, which suggests a dependable energy yield.
Reevaluating the contract amount …
Hydraulic Modeling To Inform Stream Maintenance Practices In South Carolina, Kelly Owens
Hydraulic Modeling To Inform Stream Maintenance Practices In South Carolina, Kelly Owens
All Theses
The Crabtree Canal located in Horry County, SC is the main conveyor of stormwater in a watershed that has undergone considerable urbanization in the last few decades. Evidence of bank instability and inchannel erosion is widely seen in the Crabtree Canal system. Principal sediment inputs are landscape sources and in-channel sources. A study was initiated to provide a working management tool to determine hydrodynamic conditions on the watershed driven by a hypothetical storm event and alternative channel configurations. The management tool comprised of a one-dimensional HEC-RAS model of the Crabtree Canal and was developed to aid the Horry County stormwater …
An Investigation Of Human Induced Vibrations On Clemson Memorial Stadium, Benjamin Morris
An Investigation Of Human Induced Vibrations On Clemson Memorial Stadium, Benjamin Morris
All Theses
Human induced stadium vibrations have become of increasing concern to design engineers and facility managers as more energetic crowds and increasingly efficient structures have increased the likelihood of serviceability issues. The 'in-time' bouncing of spectators due to music has caused one such issue in the south upper deck of Clemson University's Memorial Stadium. To gain an understanding of the severity of vibrations in Memorial Stadium, a combination of experimental and analytical modeling is utilized. Data collected by an array of accelerometers installed on a main post tensioned precast cantilever girder provides a season and a half of response histories in …
Reliability Of Light Frame Roof Systems Subject To High Winds, Angelina Gleason
Reliability Of Light Frame Roof Systems Subject To High Winds, Angelina Gleason
All Theses
Recent hurricane damages have devastated coastal communities and focused national attention on hurricane damage mitigation. Structural damage is one of the most significant impacts of a hurricane. Even small levels of structural damage can result in large economic losses; when gaps open in the roof system, rain water can leak in, ruining the contents of the structure and rendering it uninhabitable although it is still standing. In order to prevent these secondary damages from occurring, a better understanding of the roof system behavior is essential. This research aims to ascertain the behavior of the roof system by determining the influence …
Development Of A Methodology For Evaluating And Anticipating Improvised Explosive Device Threat Activity Using A Fault Tree Based Process, Benjamin Bennett
Development Of A Methodology For Evaluating And Anticipating Improvised Explosive Device Threat Activity Using A Fault Tree Based Process, Benjamin Bennett
All Dissertations
This document is a redacted version of the original dissertation titled 'Development of a Methodology for Evaluating and Anticipating Improvised Explosive Device Threat Activity Using a Fault Tree Based Process.' To allow for publication, information was removed which was considered sensitive in nature or which could be used by those who employ the Improvised Explosive Device, to negate any advantage gained by this research. The complete un-redacted dissertation is available (with proper vetting) to those whishing to further develop the concepts outlined in this document. Those interested in obtaining access to the complete document should contact the Joint IED Defeat …
Characterizing Liquefaction Resistance Of Aged Sand Deposits, Hossein Hayati
Characterizing Liquefaction Resistance Of Aged Sand Deposits, Hossein Hayati
All Dissertations
Presented in this dissertation are the results of various studies conducted to characterize the liquefaction resistance of aged natural deposits. The data considered include laboratory and field test results from sites in five countries with particular focus on multiple locations in the South Carolina Coastal Plain.
A new liquefaction potential map of the peninsula of Charleston, South Carolina, is presented. Liquefaction potential is expressed in terms of the liquefaction potential index (LPI) developed by Iwasaki et al. and calculated using 44 cone penetration test (CPT) profiles. The CPT profiles are supplemented with information from the 1:24,000 scale geologic map by …
Optimal Maintenance Crew Composition And Enhancement Of Crew Productivity, Robert Schober
Optimal Maintenance Crew Composition And Enhancement Of Crew Productivity, Robert Schober
All Theses
The South Carolina Department of Transportation (SCDOT) dedicates a large portion of its budget and other resources to the maintenance of the State's transportation infrastructure. In order to maximize the efficiency and productivity of the State's highway maintenance workforce, the SCDOT partnered with Clemson University to research the performance of these maintenance crews. The goal of this research is to identify optimal crew compositions, if possible, and to suggest potential crew productivity enhancement methods.
Data was collected from the SCDOT Highway Maintenance Management System (HMMS) and crew rankings were developed based on several pre-determined performance criteria. These rankings were then …
P-M Characteristics Of Reinforced Concrete Sections, Paul Johnson
P-M Characteristics Of Reinforced Concrete Sections, Paul Johnson
All Theses
This manuscript presents two parametric studies which were performed to evaluate a provision which originated in the 1994 Uniform Building Code (UBC). This provision states that if gravity-induced axial loads carried by a reinforced concrete member are greater than 35% of the pure axial load-carrying capacity (Po) of that member, then the member cannot be used as part of the lateral force resisting system (LRFS). Along with the UBC provision, the Structural Engineers Association of California's (SEAOC) Blue Book states that the value of 0.35Po corresponds to the level of axial load representing a balanced state of strain, i.e., the …
Investigation Of The Merging Of Two Axisymmetric Turbulent Jets, Jeffrey Smith
Investigation Of The Merging Of Two Axisymmetric Turbulent Jets, Jeffrey Smith
All Theses
A study was done to determine the converging distance of two axisymmetric turbulent jets and to compare the experimental results with the Reichardt hypothesis. This experiment consisted of measuring the velocity profiles of the two jets and manipulating the momentum ratio between the jets. Through testing, it was determined that the Reichardt hypothesis while efficient, over predicts the converging distance of the jets by up to 25% in some cases.
An Acoustic Doppler Velocimeter (ADV) was used to take measurements across the path of the jets and monitored the velocity and the turbulent kinetic energy. After observing the velocity profiles, …
Analysis Of Speed-Related Crashes Using Event Data Recorder Data, Swathi Korpu
Analysis Of Speed-Related Crashes Using Event Data Recorder Data, Swathi Korpu
All Theses
Safety in general is defined as 'the absence of unintended harm to living creatures or inanimate objects' (Evans, 2004). Traffic safety is measured in terms of motor vehicle crashes. A crash is an unplanned event which results in either fatality, or injury or property damage. Of all the factors that contribute to a crash, speed is a major issue, as more than 31 percent of all fatal crashes involve speeding (NHTSA, 2007). The speed-safety relationship can be determined by knowing the effect of speed on the frequency and severity of crashes. The relationship between speed and frequency of crashes is …
Evaluation Of Warm Asphalt Additives On Performance Properties Of Crm Binders And Mixtures, Chandra Akisetty
Evaluation Of Warm Asphalt Additives On Performance Properties Of Crm Binders And Mixtures, Chandra Akisetty
All Dissertations
The Warm Mix Asphalt (WMA) technologies have gained increasing popularity in recent years because of its unique property to allow the reduction in mixing and compaction temperatures of Hot Mix Asphalt (HMA) mixtures without compromising the quality of the mix. On the other hand, one of the reasons for utilizing the Crumb Rubber Modified (CRM) asphalt mixtures is that it increases the durability of the pavement by reducing the cracking and rutting potential of the pavement. However the CRM mixtures require a high mixing and compaction temperatures compared to the conventional HMA. Since the temperature requirements for CRM mixtures are …
Framework For The Fully Probabilistic Analysis Of Excavation-Induced Serviceability Damage To Buildings In Soft Clays, Matt Schuster
Framework For The Fully Probabilistic Analysis Of Excavation-Induced Serviceability Damage To Buildings In Soft Clays, Matt Schuster
All Dissertations
In this dissertation, a framework for a fully-probabilistic analysis of the potential for building serviceability damage induced by an excavation in soft clays is established. This analysis framework is established based on the concept of a serviceability limit state where the resistance is represented by the capacity of a building to resist serviceability damage, and the loading is represented by the demand on a building due to excavation-induced ground movements. In this study, both the resistance and the loading are treated as a random variable; the resistance is characterized empirically based on a database of the observed building performance while …
The Effects Of Crumb Rubber Particles On Highway Noise Reduction - A Laboratory Study, Khaldoun Shatanawi
The Effects Of Crumb Rubber Particles On Highway Noise Reduction - A Laboratory Study, Khaldoun Shatanawi
All Dissertations
Traffic noise is a major setback to the life quality of residents living in the vicinity of highways. Over the past 40 years, much legislation has been passed to regulate sound levels to which residents are exposed. Among the many approaches adopted to alleviate the problem, crumb rubber modified asphalt has been proposed as a measure to reduce highway traffic noise.
The use of crumb rubber modified asphalt to reduce traffic noise on pavements had not been evaluated in great detail prior to this study. This research investigates the effects of crumb rubber particles on asphalt pavement noise absorption ability. …
Framework For Probabilistic Analysis Of Recurrent Landslides: A Case Study Of El Berrinche, Raul Flores
Framework For Probabilistic Analysis Of Recurrent Landslides: A Case Study Of El Berrinche, Raul Flores
All Dissertations
Assessment of slope stability or landslide is a complex geotechnical problem that involves much uncertainty. To consider combined effects of the uncertainties in soil parameters and changes in pore water pressure, reliability theory may be employed. In this dissertation study, a reliability-based framework for the probabilistic analysis of recurrent landslides is developed.
Generally, the stability of a slope is analyzed deterministically with methods of limit equilibrium and a factor of safety is computed. This approach is referred to as the deterministic approach. However, a deterministic analysis alone may not be sufficient in assessing the risk level of a landslide in …
A Real-Time Traffic Condition Assessment And Prediction Framework Using Vehicle-Infrastructure Integration (Vii) With Computational Intelligence, Yongchang Ma
All Dissertations
This research developed a real-time traffic condition assessment and prediction framework using Vehicle-Infrastructure Integration (VII) with computational intelligence to improve the existing traffic surveillance system. Due to the prohibited expenses and complexity involved for the field experiment of such a system, this study adopted state-of-the-art simulation tools as an efficient alternative.
This work developed an integrated traffic and communication simulation platform to facilitate the design and evaluation of a wide range of online traffic surveillance and management system in both traffic and communication domain. Using the integrated simulator, the author evaluated the performance of different combination of communication medium and …
Crumb Rubber As A Sorption Medium For Ethylbenzene In Aqueous Solution, Carmen Grayson
Crumb Rubber As A Sorption Medium For Ethylbenzene In Aqueous Solution, Carmen Grayson
All Theses
Scrap tires have always been an environmental concern. In 2005, more than 299 million scrap tires were generated in the U.S., 259 million of which were utilized in the end-use scrap tire markets such as: tire-derived fuel generation, civil engineering applications, and ground rubber applications. The different applications and usages in the scrap tire market have helped utilize up to 87% of annually generated scrap tires in the U.S. Sixteen percent of the scrap tires were utilized in civil engineering applications in 2005 because of their beneficial properties for vibration and sound control, lightweight fill, drainage and collection for underground …
Effect Of Testing Conditions In The Standard Astm C 1567 Test Procedure On Evaluation Of Asr Mitigation Potential Of Fly Ashes, Pavan Seemakurty
Effect Of Testing Conditions In The Standard Astm C 1567 Test Procedure On Evaluation Of Asr Mitigation Potential Of Fly Ashes, Pavan Seemakurty
All Theses
Alkali Silica Reaction (ASR) is a widespread durability problem not only in the United States, but also in many countries across the world. ASR distress in concrete drastically reduces the service life of a structure and as such, there are no effective rehabilitation measures. As a result, the primary strategy to deal with ASR distress has been one of prevention/mitigation in new construction. Various mitigation measures are widely used to reduce the effects of ASR in concrete. Among these measures, the use of supplementary cementing materials (SCMs) is the most commonly employed method. SCMs are believed to mitigate expansions induced …
Assessment Of Potential Site Selection Methods For Use In Prioritizing Safety Improvements On Georgia Roadways, Priyanka Alluri
Assessment Of Potential Site Selection Methods For Use In Prioritizing Safety Improvements On Georgia Roadways, Priyanka Alluri
All Theses
With over 40,000 people continuing to die on US roads each year, the US government has heightened the awareness of critical safety issues with the passage of SAFETEA - LU legislation in 2005. The plan requires each of the states to develop a Strategic Highway Safety Plan (SHSP) and incorporate data-driven approaches to prioritize and evaluate program outcomes; else federal funds will be redirected. Seeking to meet the new demands for data-driven approaches, many states are struggling to identify data collection/maintenance requirements for satisfying new approaches to highway safety analysis. Recent research has shown that selecting projects on the basis …