Pre‐Tensioned and Posttensioned Composite Girders
Publication: Journal of Structural Engineering
Volume 115, Issue 12
Abstract
This paper deals with the analytical and experimental study of prestressed composite (steel girder with concrete slab) girders. The analysis is done for the case of simply supported bridge girder, using tendon configuration of straight, bent up, and short straight. In the development of the analytical expressions, a perfect shear connection between the concrete slab and the steel girder is assumed and the effects of losses due to creep, shrinkage, tendon relaxation, and residual stresses in the steel beam are not considered. The emphasis is placed on the stress distribution along the span under prestressing effect, and increase in initial tendon force due to application of external load. In this paper “pre‐” refers to stressing the tendon before the concrete slab is added and “post‐” to doing so after the slab is placed and ready to accept load. For this study, two girders of each 19 ft 7 in. (5,969 mm) long are tested. Calculated and observed results are then compared.
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References
1.
Abbott, P. A. (1963). “Simply supported steel I‐beams prestressed with horizontal restrained tendons.” Thesis presented to Rice Univ., at Houston, Tex., in partial fulfillment of the requirements for the deg ree of Master of Engineering.
2.
Hoadley, P. G. (1963). “Behavior of prestressed composite steel beams.” J. Struct Div., ASCE, 89, 21–34.
3.
Reagan, R. S. (1966). “An analytical study of the behavior of prestressed composite beams.” Thesis presented to Rice Univ., at Houston, Tex., in partial fulfillment of the requirements for the degree of Master of Engineering.
4.
Szilard, R. (1959). “Design of prestressed composite steel structures.” J. Struct Engrg., ASCE, 85(11), 97–123.
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Tachibana, Y., Kondo, K., and Ito, K. (1963). “Experimental study on composite beams prestressed with wire cables.” Symp., Use of High‐Strength Steel Struct., Japan Soc. for the Promotion of Sci., Tokyo, Japan.
Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 115 • Issue 12 • December 1989
Pages: 3142 - 3153
Copyright
Copyright © 1989 ASCE.
History
Published online: Dec 1, 1989
Published in print: Dec 1989
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