School of Civil and Environmental Engineering Theses and Dissertations
Original work in partial fulfillment of a graduate degree in the School of Civil and Environmental Engineering
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Recent Submissions
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Integration of Air Quality Data for Improved Estimates of PM2.5 Source Impacts
(Georgia Institute of Technology, 2016-07-19)Human exposure to air pollution is a known risk factor for the development or worsening of diseases and increased mortality. Traditionally, air quality data availability for health analyses are spatially and temporally ... -
Towards electronic structure calculations at the Exascale
(Georgia Institute of Technology, 2016-07-14)Development of new materials needs better understanding of the behavior of materials at nanoscale which involves accurate simulation of atomic and electronic interactions. Electronic structure is especially important when ... -
Efficient Large-Scale Real-Space Electronic Structure Calculations
(Georgia Institute of Technology, 2016-07-14)Calculations involving the electronic structure of matter provides valuable insight in understanding and predicting a wide range of materials properties. Over the course of the last few decades, Density Functional Theory ... -
Theoretical developments to model microstructural effects on the rheology of complex fluids
(Georgia Institute of Technology, 2016-06-23)Many processes in engineering and science involve multiphase flow, and the rate at which they operate is controlled by multiphase rheology. A rheology model with predictive capability over a wide range of physical and ... -
Microstructure-Based Modeling of Damage and Healing in Salt Rock with Application to Geological Storage
(Georgia Institute of Technology, 2016-06-24)Most mineral and energy resources such as ore, petroleum, natural gas, and geothermal energy are recovered from the earth. Nuclear waste repositories and CO2 storage systems are buried underground. Recovery of mineral ... -
Second Harmonic Rayleigh Wave Detection Using a Heterodyne Laser Interferometer
(Georgia Institute of Technology, 2016-06-03)Nonlinear acoustic measurements, including the generation of higher harmonics caused by nonlinear material behavior, haves proven to be a useful technique to detect changes in the microstructure of a material, and thus, ... -
A Hydrodynamic Characterization of Saltmarsh Ecosystems
(Georgia Institute of Technology, 2016-05-17)In the studies presented in this thesis, we examine hydrodynamics of saltmarsh ecosystems at two spatial scales. First is an assessment of tidally-driven surface flow through the saltmarsh. We find substantial water level ... -
METHODOLOGY FOR THE INTEGRATION OF ENVIRONMENTAL AND ECONOMIC IMPACTS USED IN THE DYNAMIC DETERMINATION OF THE SUSTAINABILITY OF RESIDENTIAL BUILDING MATERIALS
(Georgia Institute of Technology, 2015-07-23)Substantial environmental impacts come from the construction and operation of buildings. As of 2006, the US Geological Survey found that more than 75% of the raw materials (by weight) consumed in the United States were ... -
A Crack Detection and Diagnosis Methodology for Automated Pavement Condition Evaluation
(Georgia Institute of Technology, 2015-07-23)Pavement cracks are one of the most common pavement surface distresses. Traditionally, pavement crack evaluation is conducted manually through a human field survey, which is subjective, labor-intensive, time-consuming, and ... -
Development of computer-based first-principles kinetic models for aqueous phase advanced oxidation processes
(Georgia Institute of Technology, 2015-05-15)Advanced oxidation processes (AOPs) are attractive technologies to remove organic compounds in water. AOPs produces highly reactive hydroxyl radicals that can react with organic contaminants and further degrade these ... -
Bias Correction of Global Circulation Model Outputs Using Artificial Neural Networks
(Georgia Institute of Technology, 2015-05-01)Climate studies and effective environmental management plans require unbiased climate datasets. This study develops a new bias correction approach using a three layer feedforward neural network to reduce the biases of ... -
Wireless antenna sensors for strain and crack monitoring
(Georgia Institute of Technology, 2014-07-02)In order to accurately evaluate the safety condition of various engineering structures, numerous electronic sensors have been developed over the past few decades to measure both structural performance and operating ... -
Characterization of multiscale porosity in cement-based materials: effects of flaw morphology on material response across size and time scales
(Georgia Institute of Technology, 2015-07-23)It is perhaps paradoxical that many material properties arise from the absence of material rather than the presence of it. For example, the strength, stiffness, and toughness of a concrete are related to its pore structure. ... -
Gas flux estimation from surface gas concentrations
(Georgia Institute of Technology, 2016-05-27)A gradient-independent model of gas fluxes was formulated and tested. The model is built on the relationship between gas flux and the time history of surface gas concentration, known as half-order derivative (HOD), when ... -
Developing freeway merging calibration techniques for analysis of ramp metering In Georgia through VISSIM simulation
(Georgia Institute of Technology, 2016-05-03)Freeway merging VISSIM calibration techniques were developed for the analysis of ramp metering in Georgia. An analysis of VISSIM’s advanced merging and cooperative lane change settings was undertaken to determine their ... -
Gas flux estimation from surface gas concentrations
(Georgia Institute of Technology, 2016-05-10)The goal of this study is to develop a gradient-independent method for modeling surface gas flux using surface gas concentration data. The proposed method is built on the relationship between gas flux and the time history ... -
Laminar cracking in post-tensioned concrete nuclear containment buildings
(Georgia Institute of Technology, 2016-04-11)As a critical public safety-related structure, the long-term integrity of post-tensioned concrete containment buildings (PCCs) is necessary for continued operation of the reactors they house. In 2009, during preparations ... -
A new methodology for interoperability of heterogeneous bridge information models
(Georgia Institute of Technology, 2016-04-15)With the passing of the MAP-21 (Moving Ahead for Progress in the 21st Century) Act in 2012, the United States bridge industry has had a significant push for the use of innovative technologies to advance the highway ... -
Data assimilation and dynamical downscaling of remotely-sensed precipitation and soil moisture from space
(Georgia Institute of Technology, 2016-04-01)Environmental monitoring of Earth from space has provided invaluable information for understanding the land-atmosphere water and energy exchanges. However, the use of satellite observations in hydrologic applications is ... -
Soil moisture change due to variable water table
(Georgia Institute of Technology, 2016-05-27)The thesis numerically models and investigates the effect of a variable water table on the soil moisture content. The modelling is done using COMSOL and Richards' equation. The temporal variation plots can be used to find ...
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