Bridge Evaluation for Multipresence of Vehicles
Publication: Journal of Structural Engineering
Volume 116, Issue 3
Abstract
It is customary in North America to evaluate a short‐span bridge on a busy highway exactly the same way as a bridge on a lightly travelled road. This paper proposes that multipresence reduction factors can be used as the means for taking account of volume of traffic. These factors, strictly speaking, are applicable only to bridges that carry a high volume of traffic; however, in bridge‐design codes such as AASHTO and OHBDC, they are used for all bridges irrespective of the volume of traffic. New multipresence‐reduction factors, to be used in conjunction with AASHTO, Ontario, and CSA codes, are proposed for different classes of highways. In addition, the paper presents simplified methods of transverse load distribution that incorporate the proposed reduction factors in such a way that the designer or evaluator can see immediately the effect of volume of traffic on live load responses without having to perform extra calculations.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
Bakht, B., Cheung, M. S., and Dorton, R. A. (1982). “Discussion of 'A comparison of design loads for highway bridges,' by P. G. Buckland and R. G. Sexsmith,” Can. J. Civ. Engrg., 9(1), 138–140.
2.
Bakht, B., and Jaeger, L. G. (1985). “Bridge analysis simplified.” McGraw‐Hill Book Co., New York, N.Y.
3.
Bakht, B., and Moses, F. (1988). “Lateral distribution factors for highway bridges.” J. Struct. Engrg., ASCE, 114(8), 1785–1803.
4.
Code for design of highway bridges. CAN/CSA‐S6‐88. (1988). Canadian Standards Association (CSA), Rexdale, Ontario, Canada.
5.
Csagoly, P. F., and Knobel, Z. (1981). “The 1979 survey of commercial vehicle weights in Ontario.” Research Report RR‐230, Ministry of Transportation of Ontario, Downsview, Ontario, Canada.
6.
Harman, D. J., and Davenport, A. G. (1976). “The formulation of vehicular loading for the design of highway bridges in Ontario.” Report presented to the Ontario Ministry of Transportation, Univ. of Western Ontario, London, Ontario, Canada.
7.
Jaeger, L. G., and Bakht, B. (1987). “Multi‐presence reduction factors for bridges.” Proc., Bridge and transmission line structures, ASCE Structures Congress, August 17‐20, Orlando, Fla.
8.
Ontario highway bridge design code 2nd ed., OHBDC (1983). Ministry of Transportation of Ontario, Downsview, Ontario, Canada.
9.
Standard specifications for highway bridges, AASHTO (1989). American Association of State Highway and Transportation Officials, Washington, D.C.
Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 116 • Issue 3 • March 1990
Pages: 603 - 618
Copyright
Copyright © 1990 ASCE.
History
Published online: Mar 1, 1990
Published in print: Mar 1990
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.