Browsing by Department "Civil Engineering"
Now showing items 281-300 of 394
A Numerical Investigation on High-Reynolds-Number Gravity Currents in Pressurized and Free-Surface Systems using Shallow Water Equation and Integral Model Approaches
(2014-12-09)
Multiphase flows in the form of gravity currents are prevalent in various natural systems, as well as in some open channels and closed conduits. Thus, accurate flow simulation and efficient modeling tools are important in ...
Numerical Model Evaluations of Cumulative Contraction Scour at a Bridge Site with Cohesive Soils
(2005-08-15)
The objective of this study was to perform 2-Dimensional numerical contraction
scour calculations at an actual bridge site with cohesive soils. The 2-D model used in the
analysis was the Finite Element Surface Water ...
Numerical Simulations of the Fourth Avenue Landslide Considering Cyclic Softening
(2019-04-23)
Cyclic softening of fine grained soils has led to significant infrastructure damage in previous earthquakes. Despite this, methods to evaluate the potential deformations due to cyclic softening are not as well developed ...
Numerically Modeling Structural Behavior of Precast Three-Sided Arch Bridges for Analysis and Design
(2012-05-15)
Foley Products contracted with Auburn University to perform laboratory testing
and design validation of three-sided bottomless precast concrete structures being
produced. Tests performed included a field test on an active ...
Optimization and economics of small-scale, on-farm biodiesel production using oilseed crops and waste vegetable oil
(2011-05-25)
Recent concerns over unpredictable fuel prices and desire to reduce farm input costs have warranted producer interest in growing alternative crops for the production of biofuels such as biodiesel. Ideally, biodiesel could ...
Optimizing Haul Routes Using Geospatial Technologies for the Delivery of Ready-Mix Concrete in Urban Areas
(2007-05-15)
In the ready-mix concrete industry, timely and uninterrupted delivery of ready-mix concrete to a construction site is of utmost importance for efficient construction operation. Due to ever soaring fuel prices and small ...
The Origins and Use of Various Code Specifications and Design Guides for Concrete Slabs-on-Ground in Hangar Applications
(2018-12-13)
Research focused on the origins and applications of various code specifications and design guides used in the design of concrete slabs-on-ground in airplane hangar foundations. This thesis investigates the mathematical ...
Ozonation and Photodegradation of Oil Compounds by Surface Level Ozone and Engineered Catalysts in Marine Ecosystem
(2018-11-27)
Marine oil spill has been an environmental challenge for many decades. As the use of oil dispersants has become one of the main approaches to clean up spilled oil, the environmental behavior of dispersed oil remains poorly ...
Pavement Marking Specifications Compliance and Modeling of Retroreflectivity Performance
(2012-05-16)
This study provided an analysis of a database containing 7,840 observations of 40 highway pavement marking projects constructed in Alabama in 2007 to determine the extent to which marking properties complied with ALDOT ...
Performance Evaluations of Sediment Barrier Practices and Unmanned Aircraft System Mapping Technologies
(2018-11-15)
Sediment barriers are sediment control practices typically installed along the perimeter of construction sites that are intended to intercept, capture, and temporarily contain sheet to shallow concentrated flows prior to ...
Performance Evaluations on Ditch Check Practices and Products for Channelized Stormwater Runoff Control using Large-Scale Testing
(2013-12-19)
The primary purpose and focus of this research is to evaluate and improve erosion and sediment control practices deployed in channelized flow conditions on construction sites in an effort to better understand these practices ...
Performance Measures for Prioritizing Highway Safety Improvements Based on Predicted Crash Frequency and Severity
(2013-04-05)
The goal of this research was to develop highway performance measures that could be used to prioritize safety improvement projects by utilizing results from predicted crash frequency and crash severity for roadways the ...
Performance of Mechanically Stabilized Earth Structures When Subjected to Passive Forces
(2019-07-18)
Mechanically stabilized earth structures are increasing in popularity due to their relative ease of construction and favorable performance. Current mechanically stabilized earth designs consider only active pressures ...
Performance of Multi-Phase Passive Control Systems in Steel Structures
(2014-12-17)
Earthquake resistant buildings can experience significant damage during an event. A multi-phase passive control system (MPCS) was developed to reduce structural damage, repair costs, and downtime of buildings subjected to ...
Physical and Numerical Modeling of Buoyant Groundwater Plumes
(2008-05-15)
In coastal states, the injection of treated, relatively fresh, wastewater into deep saline aquifers offers a disposal alternative to ocean outfalls and discharge directly into local waterways. The density contrast causes ...
Physical and Structural Characterization of Sustainable Asphalt Pavement Sections at the NCAT Test Track
(2012-07-25)
A sustainable pavement can be defined as a safe, efficient and environmentally friendly pavement that meets today’s transportation needs without jeopardizing the ability to meet such needs in the future. Recent advances ...
Pilot-Testing an Ion Exchange Technology for Selective and Regenerative Arsenate Removal and an Engineered Approach for Stabilizing Arsenic-Laden Process Waste Residuals
(2008-12-15)
Pilot-scale tests of a regenerable and selective polymeric ligand exchanger (PLE) were conducted to remove As(V) at the well field of El Paso Water Utilities (EPWU) in El Paso, TX, USA. The PLE was prepared by immobilizing ...
Pore network modeling of reactive permeability
(2019-04-16)
Geochemical reactions, such as those that occur during storage of carbon dioxide in saline aquifers as part of carbon capture and storage (CCS) mitigation techniques or long-term subsurface mineral weathering, can significantly ...
Pore Scale Methods to Enhance Understanding of Geochemical Reaction Rates in Porous Media
(2019-07-23)
Geochemical reactions play an important role in subsurface systems such as in contaminant fate and transport, chemical weathering and geologic carbon sequestration. These reactions, mainly dissolution/precipitation, will ...
Potential Negative Effects of Adding Phosphate-Based Fertilizers to Lead In Metal-Contaminated Soils
(2007-08-15)
The potential negative effects of adding phosphate amendments for lead (Pb) remediation in Pb-contaminated soils were studied using column and batch experiments. Soils contaminated with high levels of lead as well as ...