Results 131 to 140 of about 13,004 (197)

AASHTO 1993 Plus: an alternative procedure for the calculation of structural asphalt layer coefficients

International Journal of Pavement Engineering, 2022
Many road agencies worldwide still use the empirical AASHTO 1993 pavement design method. Since the release of the AASHTO 1993 design guide, many aspects of pavement design have changed, including asphalt material properties, traffic, environmental ...
Seyed Farhad Abdollahi, M. Lanotte, M. Kutay, H. Bahia   +3 more
semanticscholar   +1 more source

Investigation of measured prestress losses compared with design prestress losses in AASHTO Types II, III, IV, and VI bridge girders

PCI journal, 2021
Inaccurate prediction of prestress losses leads to inaccurate predictions for camber, deflection, and concrete stresses in a bridge girder. This study aims to improve the prediction of prestress losses and provides bridge designers with insights into the
Ahmed Almohammedi, C. Murray, Canh N. Dang, W. Hale   +3 more
semanticscholar   +1 more source

Reliability-based design of corrugated web steel girders in shear as per AASHTO LRFD

Journal of constructional steel research, 2020
Despite their successful use in many bridges across several countries around the world, corrugated web steel girders (CWSGs) haven't been yet recognized formally by mainstream design codes and standards.
M. Leblouba, S. Tabsh, Samer M. Barakat
semanticscholar   +1 more source

Implementation of the AASHTO M 332 Specification: A Case Study

, 2020
Over the past 20 years, changes in asphalt binders, the widespread adoption of polymer modified asphalts, and the need to bump asphalt binder grades to consider traffic conditions have exposed the gaps in the AASHTO M 320 specification, and subsequently ...
Akshay Gundla, Ramadan A. Salim, B. Shane Underwood, K. Kaloush   +3 more
semanticscholar   +1 more source

AASHTO's Wetland Manual for Transportation Designers

Engineering Approaches to Ecosystem Restoration, 1998
The Oregon Department of Transportation (ODOT) developed the “Guide to Wetland Mitigation Issues for Transportation Designers” for the American Association of State Highway and Transportation Officials (AASHTO), published in September 1996. The manual provides a bridge of understanding between the specialized disciplines of wetland ecology and ...
Philip J. Quarterman, Michael W. Shippey
openaire   +1 more source

Fatigue Provisions of AASHTO Specifications

Journal of the Structural Division, 1976
The statistical properties of fatigue strength of various types of weldments are analyzed from which the allowable fatigue stresses are computed. Results compare favorably with those of the AASHTO Fatigue Specifications (1973). The North Carolina 1972 vehicular traffic data are used to derive the statistical properties of vehicle type, weight, and ...
Kadir M. Kusmez, Chi C. Tung
openaire   +1 more source

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
openaire   +1 more source

A Comparison of AASHTO Bridge Load Rating Methods

, 2011
M. Mlynarski, W. Wassef, A. Nowak
semanticscholar   +2 more sources

AASHTO Rigid Pavement Design Equation Study

Journal of Transportation Engineering, 1991
In 1986, a revised rigid pavement design equation was introduced by the American Association of State Highway and Transportation Officials.
Jeth A. Fogg, Ronald L. Baus, Richard P. Ray   +2 more
openaire   +1 more source

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
openaire   +1 more source