Approximate Analysis of Irregular Slab-on-Girder Bridges
Publication: Journal of Bridge Engineering
Volume 2, Issue 1
Abstract
A simple, approximate method for determining the live-load girder distribution factors of irregular slab on I-beam bridge layouts is presented. The method can also be used for the live-load analysis of bridges subjected to one truck, as in the case of fatigue, or two (or more) different truck configurations, as in the case of permit loading. The method takes into account the longitudinal as well as transverse effects of the truck loads. It is based on isolating strips of the deck slab in the transverse direction directly under the wheel loads and treating them as beams on elastic supports. The stiffness of the supports at the strip locations is computed based on the geometric properties of the beams and location of the trucks in the longitudinal direction. The accuracy of the method for shear and flexure of I-beams in simple and continuous span bridges is verified using a detailed three-dimensional finite-element analysis.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
ANSYS user's manual. (1994). Swanson Analysis Systems, Rev 5.0, Houston, Pa.
2.
Bakht, B., and Jaeger, L. (1985). Bridge analysis simplified. McGraw-Hill Book Co., Inc., New York, N.Y.
3.
Bishara, A. G., Liu, M. C., and El Ali, N. D.(1993). “Wheel load distribution on simply supported skew I-beam composite bridges.”J. Struct. Engrg., ASCE, 119(2), 399–419.
4.
Bridge code, 3rd Ed. (1992). Ministry of Transp., Quality and Standards Div., Ont., Canada.
5.
Heins, C. P., and Kuo, J.(1972). “Torsional properties of composite girders.”Engrg. J., 9(2), 79–85.
6.
Highway structures design handbook, Vol. I. (1982). AISC Marketing, Inc., Chicago, Ill.
7.
Jaeger, L., and Bakht, B. (1989). Bridge analysis by microcomputer. McGraw-Hill Book Co., Inc., New York, N.Y.
8.
Khaleel, M. A., and Itani, R. Y.(1990). “Live load moments for continuous skew bridges.”J. Struct. Engrg., ASCE, 116(9), 2361–2373.
9.
LRFD bridge design specifications—SI units, 1st Ed. (1994). Washington, D.C.
10.
Marx, H. J., Khachaturian, N., and Gamble, W. L. (1991). “Design criteria for right and skew-slab and girder bridges.”Transp. Res. Rec. No. 1319, Transp. Res. Board, Nat. Res. Council, Washington, D.C., 72–75.
11.
Sahajwani, K. (1995). “Analysis of composite steel bridges with unequal girder spacings,” MS thesis, Dept. of Civ. and Envir. Engrg., Univ. of Houston, Tex.
12.
Standard specifications for highway bridges, 16th Ed. (1996). Am. Assn. of State Hwy. and Transp. Officials (AASHTO), Washington, D.C.
13.
Tarhini, K. M., and Frederick, G. R.(1992). “Wheel load distribution in I-girder highway bridges.”J. Struct. Engrg., ASCE, 118(5), 1285–1294.
14.
Zokaie, T., Imbsen, R. A., and Osterkemp, T. A. (1991). “Distribution of wheel loads on highway bridges.”NCHRP Rep. No. 83, TRB Publ. No. 1290, Vol. I, Nat. Res. Council, Washington, D.C., 119–126.
Information & Authors
Information
Published In
Journal of Bridge Engineering
Volume 2 • Issue 1 • February 1997
Pages: 11 - 17
Copyright
Copyright © 1997 American Society of Civil Engineers.
History
Published online: Feb 1, 1997
Published in print: Feb 1997
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.