Research Article
Oct 1978
Bolted Repair of Fractured I-79 Girder
Publication: Journal of the Structural Division
Volume 104, Issue 10
Abstract
The scheme used to repair an 11-ft (3.36-m) deep web of a welded girder is described. Design checks and repair studies begun immediately after the failure are explained. After rejecting several repair schemes, the scheme chosen required work to be performed from a barge platform moored in the river under the bridge. Large test coupons were removed from the girder flange and web and fills inserted. The fractured halves of the girder bottom flange were jacked longitudinally to closure by four 300-ton (2,670-kN) hydraulic jacks. A force of approximately 2,000 kips (8,900-kN) was needed to reintroduce the dead-load moment. Bottom flange and web repair splices were made using A490 friction bolts to develop the full design capacity of the girder. The entire jacking operation was closely monitored by hydraulic gages and electrical resistance gages on the bridge.
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Information
Published In
Journal of the Structural Division
Volume 104 • Issue 10 • October 1978
Pages: 1657 - 1670
Copyright
© 1978 American Society of Civil Engineers.
History
Published in print: Oct 1978
Published online: Feb 1, 2021
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Authors
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Louis P. Schwendeman, M.ASCE
Assoc., Richardson, Gordon, and Assocs., Consulting Engrs., Pittsburgh, Pa.
Arthur W. Hedgren Jr., M.ASCE
Assoc., Richardson, Gordon, and Assocs., Consulting Engrs., Pittsburgh, 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.