Browsing by Department "Civil Engineering"
Now showing items 181-200 of 394
Exploration of Crash Severity and Location in Work Zone-Related Crashes in Alabama
(2015-01-07)
Work zones are necessary for maintenance and improvement of highways, but they also present opportunities for crashes that might not occur under normal driving conditions. From 2006-2011, 3,192 crashes resulted in some ...
Fabric Structure Strength and Structural Integrity of Large Area Maintenance Shelters (LAMS)
(2018-12-19)
Large Area Maintenance Shelters (LAMSs) are deployed worldwide by the United States Air Force. The U.S. Air Force uses LAMSs as storage facilities and hangars for vehicles and aircrafts alike. The inherent low weight and ...
Factors Affecting Arsenic Mobilization in Experimental Subsurface Systems
(2007-12-15)
Elevated concentrations of arsenic (As) in groundwater is a widespread problem
that affects millions of people around the world. Other than the adverse affects on human
health, this problem often raises economic, social ...
Factors Influencing Catenary Behavior in Ductile Steel-Framed Structures
(2012-07-02)
Historical precedent has established progressive collapse as a phenomenon characterized by the potential for extreme structural damage and loss of life. In an attempt to mitigate such behavior in conventional structures, ...
The Fate and Transport of the Antimicrobials Sulfadimethoxine and Ormetoprim in the Environment
(2007-05-15)
Over the past decade, there have been increasing concerns regarding antimicrobial contaminants in the environment. To date, there exists limited research regarding the fate of these compounds in the environment once ...
Fate, Transport, and Environmental Availability of Cu(II) Applied in Catfish Aquaculture Ponds and Enhanced Immobilization of Soil-bound Lead Using a New Class of Stabilized Iron Phosphate Nanoparticles
(2007-05-15)
Copper sulfate has been the most commonly used algaecide for about a century in the U.S. to control the off-flavor problem caused by blue-green algae in channel catfish (Ictalurus punctatus) ponds. In 2001, the ~80,000 ...
Fatigue Testing and Design of Large Diameter Shear Studs Used in Highway Bridges
(2011-07-19)
Headed studs are commonly used to transfer shear forces along the interface of the steel beam and concrete deck in composite highway bridge girders. Typical stud diameters used in composite bridge design are less than 1". ...
The Feasibility of Using Alternative Fuels to Produce Portland Cement
(2012-02-08)
The production of cement involves a combination of numerous raw materials,
strictly monitored system processes, and temperatures on the order of 1500 °C.
Immense quantities of fuel are required for the production of ...
Fiber-Reinforced Polymer Strengthening of War Memorial Bridge—Installation, Load Testing, and Analysis
(2005-12-15)
An assessment of the rehabilitation of a reinforced-concrete bridge using carbon fiber reinforced polymer (FRP) laminate materials is presented. The installation of FRP strips to girder bottoms in the positive moment section ...
Field Assessment of Cold Recycling Technologies Used for Pavement Preservation
(2020-07-14)
Cold recycling of asphalt concrete pavements is a widely practiced technique used to prolong pavement life as a low-cost preservation method. Research in recycled materials has become necessary to further evaluate the ...
Field Evaluation of Near-Surface Mounted, Fiber-Reinforced Polymer Strips for Strengthening of a Continuous Reinforced Concrete Bridge
(2016-04-27)
The Letohatchee bridge is a continuous, reinforced concrete, deck-girder bridge maintained by the Alabama Department of Transportation (ALDOT) along AL 97 over I-65 near Letohatchee, Alabama. The bridge is deficient in ...
Field Investigations and SWMM Modeling of an Undeveloped Headwaters Catchment Located in the Lower Coastal Plain Region of the Southeast USA
(2013-11-05)
The southeastern region of the United States is host to a diverse variety of geophysical regions including the Blue Ridge, Piedmont, Inland Basins and Coastal Plains. Each region shows its own distinctive set of hydrological ...
Field-Based Strain Thresholds for Flexible Perpetual Pavement Design
(2009-05-15)
In the recent years, there has been a push towards designing roadways which will sustain 50 years of trafficking without having any structural fatigue damage. These --Y´perpetual pavements¡ are designed using mechanisti ...
A Fine Line Between Dispersion and Retention: Oil-Sediment Interactions in Nearshore Marine Environments
(2017-04-12)
When crude oil that is spilled in a marine environment approaches the shoreline, it can interact with suspended sediment to form either microscopic oil-mineral aggregates (OMAs), or macroscopic surface residual balls (SRBs) ...
Finite Element Modeling of Skewed Reinforced Concrete Bridges and the Bond-slip Relationship Between Concrete and Reinforcement
(2007-12-15)
A bridge deck on US 331 near Montgomery, AL developed transverse and longitudinal cracking a few months after construction was completed. A refined finite element model of this continuous, skewed, composite bridge was ...
Finite Element Simulation and Assessment of Single-Degree-of-Freedom Prediction Methodology for Insulated Concrete Sandwich Panels Subjected to Blast Loads
(2011-01-05)
This report discusses simulation methodologies used to analyze large deflection static and dynamic behavior of foam-insulated concrete sandwich wall panels. Both conventionally reinforced cast-on-site panels and ...
Finite Element Simulation of Precast/Prestressed Insulated Sandwich Panels Optimized for Construction of Government Facilities
(2014-05-02)
This report discusses the development of finite element modeling methodologies for the static and dynamic response of insulated sandwich panels to uniform pressure loads. Experimental testing, which included solid panel ...
A Finite Volume Implementation of the Shallow Water Equations for Boussinesq Gravity Currents
(2012-07-16)
The shallow water equations (SWE) are a powerful tool for modeling the propagation of gravity currents (GC) because of their relative simplicity, computational efficiency and accuracy. Finite difference solutions, either ...
Finite-Element Modeling of a Damaged Prestressed Concrete Bridge
(2007-05-15)
Spans 10 and 11 of the Interstate Highway 565 bridge structure in Huntsville, Alabama were noticed to be cracked shortly after their construction. Alabama Department of Transportation (ALDOT) employees investigated and ...
Finite-Element Modeling of Early-Age Concrete Behavior
(2018-07-24)
Early-age cracking of concrete may influence the long-term durability of a structure. Cracking occurs when the tensile stress in concrete exceeds its tensile strength. Early-age stress development in concrete is influenced ...