Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Structural Engineering (17)
- Construction Engineering and Management (12)
- Transportation Engineering (11)
- Architecture (6)
- Computational Engineering (6)
-
- Environmental Engineering (6)
- Materials Science and Engineering (6)
- Construction Engineering (5)
- Geotechnical Engineering (5)
- Physical Sciences and Mathematics (5)
- Risk Analysis (5)
- Social and Behavioral Sciences (4)
- Structural Materials (4)
- Artificial Intelligence and Robotics (3)
- Computer Sciences (3)
- Environmental Sciences (3)
- Mechanical Engineering (3)
- Operations Research, Systems Engineering and Industrial Engineering (3)
- Aerospace Engineering (2)
- Architectural Engineering (2)
- Computer Engineering (2)
- Engineering Mechanics (2)
- Engineering Science and Materials (2)
- Longitudinal Data Analysis and Time Series (2)
- Operational Research (2)
- Other Civil and Environmental Engineering (2)
- Statistics and Probability (2)
- Keyword
-
- Concrete (9)
- Liquefaction (6)
- Masonry (5)
- Sustainability (5)
- Optimization (4)
-
- Reliability (4)
- Simulation (4)
- Transportation (4)
- UHPC (4)
- ASR (3)
- Bond strength (3)
- Bridge (3)
- Bridges (3)
- Corrosion (3)
- Durability (3)
- Modeling (3)
- Resilience (3)
- Retrofit (3)
- Safety (3)
- Scour (3)
- Uncertainty Quantification (3)
- Abbreviated Injury Scale (2)
- Aggregate (2)
- Aging (2)
- Artificial Intelligence (2)
- Autonomous vehicle (2)
- Bond Strength (2)
- Braced excavation (2)
- Building Contents (2)
- Cone penetration test (2)
- Publication Year
- Publication
- Publication Type
Articles 151 - 180 of 281
Full-Text Articles in Civil Engineering
Durability Of Reinforced Concrete Incorporating Crushed Waste Brick As Coarse Aggregate, Matthew Adamson
Durability Of Reinforced Concrete Incorporating Crushed Waste Brick As Coarse Aggregate, Matthew Adamson
All Theses
Using crushed bricks as aggregates in concrete is of particular interest to preserve natural aggregate sources as well as to reduce waste, as it has been estimated that 10% to 30% of all waste in landfills in the united States comes from construction and demolition wastes. By recycling some of these wastes, the sustainability of a project can be improved. However, it is important concrete incorporating these wastes is as durable or more durable then conventional concrete, or will it have a shorter service life. Durability of concrete is its ability to resist deterioration from its external environment such as …
Analysis And Evaluation Of Existing And Novel Turbulent Dynamic Pressure Based Methods For Measuring Bridge Pier And Abutment Scour, Murray Fisher
Analysis And Evaluation Of Existing And Novel Turbulent Dynamic Pressure Based Methods For Measuring Bridge Pier And Abutment Scour, Murray Fisher
All Dissertations
Scour is one of the most significant threats to bridge infrastructure and is the leading cause of failure within the United States. Given this risk to the nation’s transportation infrastructure, it is necessary to understand the development of scour holes around bridge piers and abutments. This can be achieved with scour monitoring, a Federal Highway Administration approved scour countermeasure. As the monitoring techniques available range from simple devices that rest on or in the channel bed to advanced scanning systems that provide a bed contour profile, a concise study of the state of the art in real time scour measurement …
Assessment Of Fidelity To Data And Robustness To Uncertainty To Assure Credible Predictions In The Modeling Of Wind Turbine Blades, Kendra Van Buren
Assessment Of Fidelity To Data And Robustness To Uncertainty To Assure Credible Predictions In The Modeling Of Wind Turbine Blades, Kendra Van Buren
All Dissertations
In the field of wind energy, modeling and simulation techniques provide an efficient and economical alternative to experimentation for studying the behavior of wind turbines. Numerical models however are approximations of reality, thusly making it crucial to evaluate various sources of uncertainties that influence the model predictions. Credibility of a numerical model rests on the model's ability to replicate existing experimental data, widely known as fidelity-to-data. This dissertation advocates that fidelity-to-data, while necessary, is insufficient to claim credibility of a numerical model. Herein, the objective is to develop numerical models that not only provide agreement to experimental data, but also …
A Laboratory Study Of Levee Scour From Overtopping Storm Waves And Protection For Robust Desgins, Earnest Johnson
A Laboratory Study Of Levee Scour From Overtopping Storm Waves And Protection For Robust Desgins, Earnest Johnson
All Theses
Levee failure due to scouring has been a prominent occurrence among intense storm surges and waves, giving rise to the implementation of various scour protection measures over the years. Several experiments were performed on a model levee on either bare levee soil or with a scour protection measure covering the soil. The purpose of this study is to breakdown the dynamics of levee scour due to overtopping waves and suggest efficient methods in reducing the amount of scour. The levee soil was made up of a sand-clay mixture and placed in a laboratory wave tank that created a constant wave …
Numerical And Reliability Analysis Of Gravity Cantilever Retaining Walls Backfilled With Shredded Tires Subjected To Seismic Loads, Eleanor Huggins
Numerical And Reliability Analysis Of Gravity Cantilever Retaining Walls Backfilled With Shredded Tires Subjected To Seismic Loads, Eleanor Huggins
All Theses
Shredded tires have been considered as a suitable alternative to conventional sand and gravel backfill materials as they offer benefits from their significantly lower unit weight, reductions in the cost of materials and construction, and because they utilize a common and potentially hazardous waste material. This research addresses some gaps in previous research in the implementation of shredded tires in this capacity by examining variation in material properties through a reliability analysis, developing an improved design technique for retaining walls tailored to shredded tire fills, and simulating how shredded tire backfill behaves in conjunction with retaining walls when subject to …
Load Carrying Capacity Assessment Of A Masonry Dome, Tun Li
Load Carrying Capacity Assessment Of A Masonry Dome, Tun Li
All Theses
This thesis first establishes a semi-empirical relationship to estimate the reduction in load carrying capacity of a masonry dome due to damage by exploiting deviations in the fundamental natural frequency. A macro finite element model of the dome is developed and calibrated using both non-destructive vibration measurements and destructive load-displacement measurements up to failure. The macro-model is then executed to simulate incremental development of cracks. The first natural frequency and remaining load carrying capacity of the dome are monitored to define a semi-empirical relationship, which is ultimately generalized for spherical domes with varying span-to-height ratios.
Subsequently, in order to numerically …
The Effect Of Granular Activated Carbon Pretreatment And Sand Pretreatment On Microfiltration Of Greywater, David Christopher
The Effect Of Granular Activated Carbon Pretreatment And Sand Pretreatment On Microfiltration Of Greywater, David Christopher
All Theses
Around the world, water scarcity is driving people to practice water reuse. One form of water reuse is the recycling of greywater, which is household wastewater excluding toilet waste. With adequate treatment, greywater may be recycled onsite for applications that do not require potable water, such as irrigation or toilet flushing. Membrane filtration (including microfiltration (MF)) is one option for greywater treatment. The small footprint, modular nature, and predictable performance of MF make it an attractive option. However, direct MF of greywater can lead to rapid membrane fouling. This thesis investigated two possible pretreatments for reducing membrane fouling and improving …
Resource Allocation Framework: Validation Of Numerical Models Of Complex Engineering Systems Against Physical Experiments, Joshua Hegenderfer
Resource Allocation Framework: Validation Of Numerical Models Of Complex Engineering Systems Against Physical Experiments, Joshua Hegenderfer
All Dissertations
An increasing reliance on complex numerical simulations for high consequence decision making is the motivation for experiment-based validation and uncertainty quantification to assess, and when needed, to improve the predictive capabilities of numerical models. Uncertainties and biases in model predictions can be reduced by taking two distinct actions: (i) increasing the number of experiments in the model calibration process, and/or (ii) improving the physics sophistication of the numerical model. Therefore, decision makers must select between further code development and experimentation while allocating the finite amount of available resources. This dissertation presents a novel framework to assist in this selection between …
Deviations In Standard Aggregate Gradation And Its Affects On The Properties Of Portland Cement Concrete, Marcus Balitsaris
Deviations In Standard Aggregate Gradation And Its Affects On The Properties Of Portland Cement Concrete, Marcus Balitsaris
All Theses
Aggregate gradation is the particle size distribution of both the stone and sand present in the concrete matrix. It is an aggregate property that has been heavily researched for over a century but the effects of which on concrete properties is still somewhat misunderstood. Past research has revealed that aggregate gradation dictates the proportion of aggregate to cement paste in concrete, and can play a major variable that determines the overall durability of the construction material. Increasingly, aggregate in South Carolina are failing to meet the standard aggregate gradation for portland cement concrete, however, the effects of such failed aggregate …
Low Carbon Materials Management: A Case Study For The Clemson University Net Zero Energy House Project, Kelly Kruzner
Low Carbon Materials Management: A Case Study For The Clemson University Net Zero Energy House Project, Kelly Kruzner
All Theses
Materials management in the construction process is a method of controlling resources for a project. This includes the materials selection process, purchasing process, delivery process, and waste management process, which all constitute the materials management plan for the project. While many research projects suggest efforts to reduce overall project cost by managing materials more efficiently, few focus on materials management from a sustainability perspective. In 2009, the U.S. Environmental Protection Agency published a report on Sustainable Materials Management: The Road Ahead, which details the importance of sustainable materials management practices. This project directly addresses a need defined in the EPA’s …
Development And Calibration Of Central Pressure Filling Rate Models For Hurricane Simulation, Fangqian Liu
Development And Calibration Of Central Pressure Filling Rate Models For Hurricane Simulation, Fangqian Liu
All Theses
This study presents the development of a new central pressure filling rate model to characterize the rate at which hurricanes or tropical storms decay after landfall. It has been shown that the post landfall decay rate of hurricanes is closely related to the time after landfall, the size of hurricane and proximity of the hurricane eye to the coastline. In addition, it has been observed that the decay rates of hurricanes are geographically dependent. Based on these observations, a set of simple empirical models expressed in
terms of exponential and linear equations are utilized to characterize the decay rate of …
Pozzolanic Properties Of Biomass Fly Ash, Robert Lowe
Pozzolanic Properties Of Biomass Fly Ash, Robert Lowe
All Theses
As biomass power production becomes more main stream, problems with waste disposal arise. Coal fly ash, a by-product of coal power production, has beneficial strength and durability properties when used as a cement replacement material. This study examined strength and durability characteristics of mortar and concrete samples containing biomass fly ash obtained from Craven County Wood Energy in North Carolina and examined methods of processing the material to enhance its pozzolanic characteristics.
The chemical and mineralogical compositions of the ash were determined using X-ray fluorescence (XRF), X-ray diffraction (XRD), and energy dispersive X-ray spectroscopy (EDS). The compositions met the requirements …
Understanding The Behavior Of A Pile Foundation In Unsaturated Soils Subjected To Lateral Loading, Brian Machmer
Understanding The Behavior Of A Pile Foundation In Unsaturated Soils Subjected To Lateral Loading, Brian Machmer
All Theses
The purpose of this research was to further understand the behavior of pile foundations in unsaturated soils subjected to lateral loading. Recent case histories show the importance of incorporating unsaturated soil mechanics in geotechnical engineering practice for the design and construction of resilient and cost effective systems. Unsaturated soils are a three phase material- solid, liquid and gas, resulting in three interfaces. Among the three interfaces the liquid-gas interface, also known as the contractile skin, plays a critical role in the mechanical and flow behaviors of unsaturated soil. The effects of the contractile skin are measured in terms of matric …
Entrainment And Dilution Of Constant-Volume Non-Newtonian Fluid Mud Gravity Currents, Michael Jacobson
Entrainment And Dilution Of Constant-Volume Non-Newtonian Fluid Mud Gravity Currents, Michael Jacobson
All Theses
An extensive laboratory experimental campaign was undertaken in order to elucidate the entrainment and dilution characteristics of constant-volume non-Newtonian fluid mud gravity currents. Three experimental series were conducted in a lock-exchange tank. The first experimental series quantified ambient entrainment using a light-opaqueness technique, the second experimental series measured vertical concentration profiles using a siphoning technique, and the third experimental series provided visual observations for the investigation of the deposited sediment layer.
In the first experimental series, a technique similar to the so-called light attenuation technique was developed to find the boundary of the current, allowing for the calculation of entrainment …
Connected Vehicle Supported Electric Vehicle Charging Operations And Related Infrastructure Issues, Jennifer Johnson
Connected Vehicle Supported Electric Vehicle Charging Operations And Related Infrastructure Issues, Jennifer Johnson
All Theses
Due to the tremendous political, economic and environmental pressures the transportation sector is facing, the United States finds itself devoting more energy to innovative solutions like electric vehicle (EV) technologies. The first objective of this study was to analyze how utilizing real-time information dissemination transferring capabilities to vehicles, as envisioned in the 'connected vehicle' system, could effectively facilitate the EV charging process at fast-charging stations. By simulating a traffic network of EVs in Matlab, it was found that the total time due to the battery charging process could be optimized for EVs that were able to use connected vehicle communications. …
Geology-Based Probabilistic Liquefaction Potential Mapping Of The 7.5-Minute Charleston Quadrangle, South Carolina For Resilient Infrastructure Design, Lawrence Simonson
Geology-Based Probabilistic Liquefaction Potential Mapping Of The 7.5-Minute Charleston Quadrangle, South Carolina For Resilient Infrastructure Design, Lawrence Simonson
All Theses
Two geology-based probabilistic liquefaction potential maps are developed for the 7.5-minute Charleston, South Carolina quadrangle in this thesis. Creation of the maps extends the previous liquefaction potential mapping work of the Charleston peninsula by Hayati and Andrus (2008) and Mount Pleasant by Heidari and Andrus (2010), and improves upon the previous maps by using peak ground accelerations that vary with local site conditions. The GIS software package ArcGIS 10 is used to develop the maps.
Development of the liquefaction potential maps involves the creation of four additional maps needed as inputs. The four additional maps are (1) depth to the …
Using Gis-Based, Hitchcock Algorithm To Optimize Parking Allocations For Special Events, Wayne A. Sarasua, Prashant Malisetty, Mashrur Chowdhury
Using Gis-Based, Hitchcock Algorithm To Optimize Parking Allocations For Special Events, Wayne A. Sarasua, Prashant Malisetty, Mashrur Chowdhury
Publications
Clemson, a small college town in South Carolina, deals with a massive over-saturation of its transportation system during special events, especially during home football games, resulting in total system failure. This research has developed a methodology to optimize parking, using a Geographic Information System (GIS)-based transshipment algorithm, and it has produced great time savings compared with the individual, “manual” efforts of thousands of drivers attempting to find spaces where available. As such, this research constitutes an effective implementation of the Hitchcock Transportation Algorithm for solving a transshipment problem applied to parking lot distribution. Because the Hitchcock Algorithm considers the network …
Probabilistic Approaches To Stability And Deformation Problems In Braced Excavation, Zhe Luo
Probabilistic Approaches To Stability And Deformation Problems In Braced Excavation, Zhe Luo
All Dissertations
This dissertation is aimed at applying probabilistic approaches to evaluating the basal-heave stability and the excavation-induced wall and ground movements for serviceability assessment of excavation in clays. The focuses herein are the influence of spatial variability of soil parameters and small sample size on the results of the probabilistic analysis, and Bayesian updating of soil parameters using field observations in braced excavations.
Simplified approaches for reliability analysis of basal-heave in a braced excavation in clay considering the effect of spatial variability in random fields are presented. The proposed approaches employ the variance reduction technique (or more precisely, equivalent variance method) …
Fluid Mud Underflows In Coastal Dredge Disposal, Mijanur Chowdhury
Fluid Mud Underflows In Coastal Dredge Disposal, Mijanur Chowdhury
All Dissertations
This manuscript presents the results of a thorough theoretical and experimental investigation on fluid mud underflows generated in a typical coastal dredge disposal operation. The main goal of this investigation is to understand the propagation dynamics of fluid mud underflows that depends upon a number of factors, including: concentrations, rheological properties and released configurations of fluid mud. Laboratory experiments were conducted with different initial fluid mud concentrations in three different experimental set-ups: rectangular flume for constant volume release, rectangular flume for constant flux release, and a square pool for radial constant flux release of fluid mud. The experiments in the …
Temporal Pier Scour Evolution Under Stepped Hydrographs, Mark Schillinger
Temporal Pier Scour Evolution Under Stepped Hydrographs, Mark Schillinger
All Theses
The present study was aimed at measuring the scour hole profile at bridge piers under clear water scour. Scour tests were performed under both steady state flow and under stepped hydrographs. Multiple smaller flood events were run to determine how flood history affects scour hole development. Various equilibrium scour depth equations and proposed temporal scour models were compared. The similarity of the scour hole profiles with time and flow history were evaluated.
Experiments were conducted in a 14.8 m long, 1.19 m wide, 1.22 m deep rectangular flume with a model bridge pier. A uniform sediment bed (d50= …
Analysis And Parameterization Of The Flight Of Ember Generation Experiments, Hillary Harris
Analysis And Parameterization Of The Flight Of Ember Generation Experiments, Hillary Harris
All Theses
This thesis presents a study on ember flight modeling based on a series of wind tunnel experiments. The purpose of these experiments and the data collected was to provide the input conditions for an ember flight model in order to compare and validate the model predictions. An analysis was performed which determined the sensitivity of model predictions of downwind mass distribution to uncertainties in the model input parameters.
From the wind tunnel experiments, flight distances were measured and characteristic ember size distributions were obtained from the collected data. A flight model was developed based on standard models published in the …
Robust Design And Monitoring Tools For Sustainable And Resilient Structural Design And Infrastructure Management, Sarah Dalton
Robust Design And Monitoring Tools For Sustainable And Resilient Structural Design And Infrastructure Management, Sarah Dalton
All Theses
Structural systems are subject to inherent uncertainties due to the variability in many hard-to-control `noise factors' that include but are not limited to external loads, material properties, and construction workmanship. Two design methodologies have been widely accepted in the practicing engineering realm to manage the variability associated with operational structures: Allowable Stress Design (ASD) and Load and Resistance Factor Design (LRFD). These traditional approaches explicitly recognize the presence of uncertainty; however, they do not take robustness against this uncertainty into consideration. Overlooking this robustness against uncertainty in the structural design process has two drawbacks. First, the design may not satisfy …
Development And Application Of A Three-Dimensional Probabilistic Wind-Borne Debris Trajectory Model, James Grayson
Development And Application Of A Three-Dimensional Probabilistic Wind-Borne Debris Trajectory Model, James Grayson
All Theses
This research presents a probabilistic debris trajectory model adapted from current 6-degree-of-freedom (6-DoF) deterministic models, in which the aleatoric (inherent) uncertainty is explicitly considered in the proposed probabilistic model. While the inherent randomness in the debris flight trajectory is irreducible due to the wind turbulence, variation in wind direction, gustiness of the wind event and so forth, the proposed probabilistic model seeks to address these uncertainties through Monte Carlo simulations with the appropriate statistical distributions applied to the governing equations of motion of the debris. Verification of the probabilistic debris trajectory model is performed through an analytical and visual comparison …
A Methodology For Estimating And Comparing The Lifecycles Of High-Build And Conventional Waterborne Pavement Markings On Primary And Secondary Roads In South Carolina, Joseph Robertson
All Theses
Highway pavement markings constitute a vital component of roadway transportation systems and provide crucial visual cues for the basic driver task of following the road. In 2008, the South Carolina Department of Transportation (SCDOT) initiated a multi-year study to evaluate pavement markings on non-interstate primary and secondary roads in South Carolina. This thesis discusses development of a methodology for estimating and comparing the lifecycles of high-build and conventional waterborne pavement markings based on retroreflectivity levels. The methodology was developed using nearly 3 years of field data from 66 sites throughout South Carolina. This thesis provides an overview of data collection …
Influence Of Pavement Type On Near Surface Air Temperature, David Duncan
Influence Of Pavement Type On Near Surface Air Temperature, David Duncan
All Theses
Effects from an Urban Heat Island (UHI) can be detrimental to the world as a whole. This study examines a collection of permeable and conventional pavements in South Carolina to determine how they relate to near surface air temperatures, which is an indicator of the UHI impact of an area. Three locations were used, each with a different selection of pavement type. Permeable and conventional forms of both asphalt and concrete were tested, as were some open graded friction course samples. Air temperatures were measured and recorded from the pavement surface up to an elevation of 60-in.
Multiple days of …
The Integration Of Building Information Modeling (Bim) Into Civil Engineering Curricula, Jason Cooksey
The Integration Of Building Information Modeling (Bim) Into Civil Engineering Curricula, Jason Cooksey
All Theses
Building Information Modeling (BIM) is an emerging technology used in the Architecture/Engineering/Construction (AEC) industry. The proliferation of BIM usage across the industry has been swift and prolific. Academia has lagged behind the adoption rate of the industry by not producing enough students with BIM exposure. Thus, the question is whether civil engineering curricula should provide an understanding of BIM technology to students entering the design and construction profession. The immediate objective of this research is to determine if it is important to provide exposure of BIM to undergraduate or graduate students in the civil engineering curricula and if so to …
Influence Of Warm Mix Additives Upon High Rap Asphalt Mixes, William Rogers
Influence Of Warm Mix Additives Upon High Rap Asphalt Mixes, William Rogers
All Dissertations
This study was conducted to determine the effect of warm mix (WMA) modifiers on asphalt mixes containing high percentages of reclaimed asphalt pavement (RAP). Mixes were created using three aggregate sources, four RAP percentages (0%, 20%, 35%, and 50%), and three warm mix modifiers (HMA, zeolite, and Sasobit®). Base binders from the same source (PG 64 -22, 58 -28, 52 -28) and one rejuvenator were used for each mix to ensure the final blended binder grade was at least PG 64 -10.
Specimens were created at HMA or suggested WMA temperatures and tested for rut depth, indirect tensile strength (ITS), …
Analyzing Of Tort Claims And Lawsuits Against South Carolina Department Of Transportation Through Classification And Regression Tree Analysis, Sara Familian
All Dissertations
After losing sovereign immunity in 1985, SCDOT employees now focus a significant amount of time in processing tort claims and lawsuits filed against the agency. This is an important issue for transportation agencies considering the fact that money spent defending tort claims and lawsuits, is no longer available for safety and mobility improvements on the state highway system.
The South Carolina Department of Transportation (SCDOT) processes approximately one thousand claims per year and is engaged in nearly one hundred lawsuits per year. SCDOT has paid just over a half million ($523,607) to settle on 1007 claims - approximately 1/3 of …
Determining Transverse Design Forces For A Next-D Bridge Using 3d Finite Element Modeling, Robert Funcik
Determining Transverse Design Forces For A Next-D Bridge Using 3d Finite Element Modeling, Robert Funcik
All Theses
This thesis looks into the use of 3D Finite Element Modeling to determine the transverse design forces for short-span bridges built using the Northeast Extreme Tee with integral deck (NEXT-D) beam. Models were built using either solid elements or shell elements to represent the bridge deck, and the results were compared. The stiffness of the shear keys were taken into account during the modeling process. Results were compared to the AASHTO strip width method for design bridge decks, and the results showed that the strip width method would not be adequate for the design of NEXT-D bridges, so specific live …
Fault-Tree Model For Bridge Collapse Risk Analysis, Caitlyn Davis-Mcdaniel
Fault-Tree Model For Bridge Collapse Risk Analysis, Caitlyn Davis-Mcdaniel
All Theses
Bridges are vital components of the United States surface transportation infrastructure and, moreover, support the growth of our nation's economy. However, over the past few decades the design capacity and service condition of many bridges in the U.S. has been challenged. Numerous incidents of bridge collapse call for an urgent need to develop a systematic method of assessing the failure risks and identifying the initiating events that can lead to a bridge collapse. This thesis presents a process of bridge failure risk analysis through fault-tree modeling and identification of specific countermeasures, to minimize failure risk, related to structural health monitoring …