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Experimental Investigations On Small-strain Stiffness Properties Of Partially Saturated Soils Via Resonant Column And Bender Element Testing
(Civil & Environmental Engineering, 2007-08-23)
A comprehensive series of resonant column (ASTM D 2325-68), bender element (ASTM C 778), pressure plate (ASTM D 4015-92), and filter paper (ASTM D 5298) tests were conducted on compacted specimens of poorly graded sand ...
Experimental And Finite Element Based Investigations Of Shear Behavior In Reinforced Concrete Box Culverts
(Civil & Environmental Engineering, 2007-10-08)
This study evaluates the shear behavior and capacity of the precast concrete box culverts subjected to HS 20 truck wheel load. The most critical culvert behavior was considered by studying culverts subjected to zero depth ...
Autotrophic Denitrification Of Groundwater In A Granular Sulfur-packed Up-flow Reactor
(Civil & Environmental Engineering, 2007-09-17)
Autotrophic denitrification is an effective treatment technique for nitrate removal from groundwater. Six basic elements are required for the growth of autotrophic denitrifiers: (1) electron donor, (2) electron acceptor, ...
Development Of Finite Element Method-based Model Equations For Hollow Tapered Poles
(Civil & Environmental Engineering, 2007-08-23)
This study presents the development of three-parameter load-deflection models for steel and FRP poles commonly used to support closed circuit television cameras. An experimental investigation is carried out to obtain static ...
Analysis Of Hat Sectioned Reinforced Composite Beams Including Thermal Effects
(Civil & Environmental Engineering, 2007-08-23)
A simple analytical method for analyzing fiber reinforced polymeric composite beams with hat cross-section is presented. The method includes development of closed-form expression of the axial, bending and their coupling ...
Dynamic Chracteristics And Stability Analysis Of Muncipal Solid Waste In Bioreactor Landfills
(Civil & Environmental Engineering, 2007-09-19)
Bioreactor landfills are operated to enhance refuse decomposition, gas production, and waste stabilization. The major aspect of bioreactor landfill operation is the recirculation of generated leachate back through the ...
Roadway Shallow Water Flow Modeling By Velocity Distribution
(Civil & Environmental Engineering, 2007-09-17)
Manning's equation is a widely used method for determining flow discharge in a channel with unconfined gravity flow. The roughness value, n-value, is a critical factor for Manning equation to obtain the accurate amount of ...
Laboratory And Field Investigations To Address Erosion, Volume Change And Desiccation Cracking Of Compost Amended Expansive Subsoils
(Civil & Environmental Engineering, 2007-08-23)
Desiccations cracks are formed during drying process of fine grained cohesive soils in summer and these cracks often appear on unpaved subgrades due to direct exposure to sun. These cracks allow surface runoff infiltration ...
Runway Incursion Mitigation, Capacity Enhancement, And Safety Improvements With Perimeter Taxiway Operations at Dallas Fort Worth International Airport
(Civil & Environmental Engineering, 2007-08-23)
A perimeter taxiway (PT) or end-around taxiway (EAT) operation is a new concept being developed at several airports around the country to eliminate active departure runway incursions during peak periods. PTs will enhance ...
Mode Choice Models For Long Distance Travel In USA
(Civil & Environmental Engineering, 2007-08-23)
The influences of technology and economic development on human activity are increasingly taking place on larger spatial scales. As a consequence, complementary interactions between urban regions are getting stronger, which ...