Collapse Loads of Continuous Orthotropic Bridges
Publication: Journal of Structural Engineering
Volume 111, Issue 8
Abstract
The ultimate‐load carrying capacity of relatively wide continuous orthotropic slab bridges has been estimated using the yield‐line theory. Bridges of skew and rectangular planforms under several loading conditions are considered. The influence of the angle of inclination of the interior pier line support on the collapse load is established. The assumed yield‐line patterns, based on a parametric study using a progressive failure analysis, are verified and substantiated by test results from two 2‐span continuous prestressed concrete waffle slab bridges of skewed and rectangular planforms. A method by which a concentrated load is made equivalent to an AASHTO HS 20 truck loading is presented. A design example illustrates the use of the equations derived.
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References
1.
El‐Sebakhy, I. S., “Elastic and Ultimate Behaviour of Waffle Slab Structures,” thesis presented to the University of Windsor, at Windsor, Ontario, Canada, in 1982, in partial fulfillment of the requirements for the degree of Doctor of Philosophy.
2.
Gupta, D. S. R., and Kennedy, J. B., “Continuous Skew Orthotropic Plate Structures,” Journal of the Structural Division, ASCE, Vol. 104, No. ST2, Paper 13566, Feb., 1978, pp. 313–328.
3.
Heins, C. P., and Kurzweil, A. D., “Load Factor Design of Continuous‐Span Bridges,” Journal of the Structural Division, ASCE, Vol. 102, No. ST6, Paper 12219, June, 1976, pp. 1213–1228.
4.
Johansen, K. W., Yield‐line Theory, Cement and Concrete Association, London, England, 1962 (translation).
5.
Kennedy, J. B., and El‐Sebakhy, I. S., “Waffle Slab Concrete Bridges: Ultimate Behavior,” Journal of the Structural Division, ASCE, Vol. 108, No. ST6, Paper 17173, June, 1982, pp. 1285–1301.
6.
Kennedy, J. B., and Grace, N. F., “Prestressed Decks in Continuous Composite Bridges,” Journal of the Structural Division, ASCE, Vol. 108, No. ST11, Paper 17464, Nov., 1982, pp. 2394–2410.
7.
Kennedy, J. B., and Bakht, B., “Feasibility of Waffle Slabs for Bridges,” Canadian Journal of Civil Engineering, Vol. 10, No. 4, 1983, pp. 627–638.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 111 • Issue 8 • August 1985
Pages: 1827 - 1845
Copyright
Copyright © 1985 ASCE.
History
Published online: Aug 1, 1985
Published in print: Aug 1985
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