Results 171 to 180 of about 10,814 (222)

AASHTO T307 — Background and Discussion

2003
The current AASHTO protocol for determination of resilient modulus of soils and aggregate material (T307-99) is based largely on Long Term Pavement Performance (LTPP) Protocol P46. The LTPP protocol evolved over a number of years and has had numerous contributors (including significant guidance and input from the authors of this paper).
JL Groeger, GR Rada, A Lopez
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AASHTO Flexible Pavement Design Equation Study

Journal of Transportation Engineering, 1989
A revised flexible pavement design equation has recently been published by the American Association of State Highway and Transportation Officials. The revised equation contains new input parameters: resilient modulus, \IM\dR,\N to characterize subgrade support; reliability, \IR,\N to allow the designer to introduce the concept of risk analysis into the
Ronald L. Baus, Jeth A. Fogg
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Numerical investigation on redundancy of bridges with AASHTO I-girders

Bridge Structures, 2021
Bridge safety is one of the most critical concerns among civil engineering fields due to its high importance. The redundancy of bridges was heavily investigated in the literature; however, they were focused on twin girder redundancy cases. Additionally, literatures were scarce in studies that focused on the improvement that should be made to achieve ...
Alotaibi, Emran, Nassif, Nadia, Alhalabi, Mohamad, Al Sebai, Humam, Barakat, Samer   +4 more
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AASHTO Drainage Coefficients for Flexible Pavements

Transportation Research Record: Journal of the Transportation Research Board, 2001
A method for determining AASHTO drainage ( m) coefficients for flexible pavements is presented. In essence, m coefficients were developed as ratios of the layer coefficients of the AASHO road test granular base material under any given drainage and climate condition to the layer coefficient of the road test base material under road
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Designing Stormwater Chambers to Meet AASHTO Specifications

Journal of ASTM International, 2010
Abstract Thermoplastic stormwater chambers have been successfully used on many projects to meet current federal regulations controlling discharges from newly developed sites. These structures are commonly located under parking lots or roadways and subjected to vehicular loads on a regular basis.
Timothy J. McGrath, David Mailhot
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AASHTO specifications for noise evaluations of pavement surfaces

The Journal of the Acoustical Society of America, 2020
Three specifications for the noise evaluation of pavement surfaces have been developed for the American Association of State Highway Transportation Officials (AASHTO). These include (1) the On-Board Sound Intensity (OBSI) method (AASHTO T-360-16) of directly measuring noise generated at the tire-pavement interface in isolation of other noise sources ...
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Interaction of Blast Load on AASHTO Girder Bridge

Applied Mechanics and Materials, 2016
Guidelines of blast resistant design for AASHTO girder bridges have not taken up much importance on researches. As the transportation infrastructure mainly bridges are highly vulnerable for bomb attack, they must be designed to resist it. The analysis and design of bridges subjected to blast load requires a detailed understanding of blast propagation ...
G. Nikhil, N.I. Narayanan
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Blast Capacity and Protection of AASHTO Girder Bridges

Forensic Engineering (2006), 2006
AASHTO has specified probability-based design methodology and load factors for designing bridge piers against ship impact and vehicular collision. Currently, no specific AASHTO design guideline exists for bridges against blast loading. Structural engineering methods to protect infrastructure systems from terrorist attacks are required.
A. K. M. Anwarul Islam, Nur Yazdani
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A Comparison of AASHTO Bridge Load Rating Methods

Structures Congress 2009, 2009
Visual bridge inspections provide engineers with information to quantify the degradation in structural integrity of a bridge (i.e., the reduction in C). The trends in RF over time can be employed by bridge owners to make decisions regarding bridge maintenance and replacement.
Cristopher D. Moen, Leo Fernandez
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Perspectives on AASHTO Load and Resistance Factor Design

Journal of Bridge Engineering, 2011
The American Association of State Highway and Transportation Officials (AASHTO) first published the Load and Resistance Factor Design Bridge Design Specifications (LRFD Code) in 1994 after several years of development. Each year since its inception, the reliability-based LRFD Code has been refined and improved.
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