Prestressed Continuous Composite Bridges under Dynamic Load
Publication: Journal of Structural Engineering
Volume 116, Issue 6
Abstract
The dynamic and fatigue responses of continuous composite bridges with prestressed concrete deck slabs are investigated. The dynamic analysis of such continuous slab‐on‐steel girder bridges is based on the orthotropic plate theory using reliable estimates of the orthotropic rigidities of the bridge. Experimental results from tests on four 1/4‐scale models of continuous composite bridges verify and substantiate the analytical results. Two of the bridge models are tested under repeated loading at the resonance frequency of the structures. The dynamic strain variations due to repeated loading are determined for various components, such as the prestressing steel, the steel girders, the concrete deck slab, and the shear stud connectors. It is shown that prestressing the concrete deck slab in the vicinity of the pier supports eliminates transverse cracking of the slab, enhances the natural frequencies, and increases the fatigue life as well as the ultimate load‐carrying capacity.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 116 • Issue 6 • June 1990
Pages: 1660 - 1678
Copyright
Copyright © 1990 ASCE.
History
Published online: Jun 1, 1990
Published in print: Jun 1990
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