Heat‐Straightening Prototype Damaged Bridge Girders
Publication: Journal of Structural Engineering
Volume 115, Issue 7
Abstract
While heat‐straightening techniques have been used to repair damaged steel bridge girders for a number of years, little experimental data documenting behavior are available. The purpose of this paper is to describe an experimental program in which prototype steel girders were damaged and restraightened. To simulate an actual bridge, a test facility was constructed which was capable of handling girders up to 3 ft deep and 40 ft long. Two girders were damaged and heat‐straightened twice each with the behavior measured after each heating cycle. The results of these tests indicate that a distinct advantage is obtained by applying external forces prior to heating, that all plastically deformed areas should be heated, yield lines should be heated with line heats and yield zones by vee heats, and that repetitive damage can be repaired by heat‐straightening without affecting the strength of the structure.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 115 • Issue 7 • July 1989
Pages: 1631 - 1649
Copyright
Copyright © 1989 ASCE.
History
Published online: Jul 1, 1989
Published in print: Jul 1989
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