Research Article
Jul 1970
Theoretical Stresses and Strains from Heat Curving
Publication: Journal of the Structural Division
Volume 96, Issue 7
Abstract
Horizontally curved steel girders for curved highway bridges can be economically fabricated by building a straight girder and then heating appropriate flange edges to induce a residual curvature after cooling. The results of a theoretical investigation of the residual stress, strain, and curvature due to this heat-curving process are presented. The analytical model used a perfect elastic-plastic, temperature-dependent stress-strain relationship for the steel, and temperature profiles in the girder flanges based on heat-transfer theory for a semi-infinite plate. The effects of maximum edge temperatures to 1,150°F over increasing widths of the flanges of a typical girder were determined. The residual stresses after heat curving were tensile near the flange edge and compressive elsewhere, except near the center of the flange, where tensile stress sometimes remained. The final curvature, which was determined from the residual strain distribution, generally increased with maximum temperature.
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Published In
Journal of the Structural Division
Volume 96 • Issue 7 • July 1970
Pages: 1421 - 1444
Copyright
© 1970 American Society of Civil Engineers.
History
Published in print: Jul 1970
Published online: Feb 1, 2021
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Authors
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Roger L. Brockenbrough, M.ASCE
Assoc. Res. Consultant; Appl. Res. Lab., U.S. Steel Corp., Monroeville, Pa.
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ASCE Library Cards let you download journal articles, proceedings papers, and available book chapters across the entire ASCE Library platform. ASCE Library Cards remain active for 24 months or until all downloads are used. Note: This content will be debited as one download at time of checkout.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.