Fatigue Strength of Prestressed Composite Steel-Concrete Beams
Publication: Journal of Structural Engineering
Volume 121, Issue 12
Abstract
Effective prestressing increases the strength of existing composite steel-concrete bridges. Investigators have determined the static strength of prestressed composite girders, but without addressing fatigue strength—an important design factor in highway bridges. In this paper, 11 prestressed composite beams with a cover plate welded to the tension flange were prestressed with two seven-wire strands. In fatigue tests to failure, cracks initiated in the flange at the cover-plate ends. Stress ranges in the strands and at the base of the shear studs were too small to initiate cracks. Prestressing of the steel beam so that the stress in the tension flange alternates between tension and compression under cyclic loading raised the fatigue strength of the welded cover plates by one category, from D to C.
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References
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 121 • Issue 12 • December 1995
Pages: 1850 - 1856
Copyright
Copyright © 1995 American Society of Civil Engineers.
History
Published online: Dec 1, 1995
Published in print: Dec 1995
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