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Fatigue retrofits of the I-435 Missouri River Bridge

Fatigue retrofits of the I-435 Missouri River Bridge The I-435 Bridge over the Missouri River at Kansas City, Missouri, consists of twin two-girder structures. Inspections by the Missouri Department of Transportation (MoDOT) in 2003 detected numerous cracks at the floor beam and lateral member connections throughout the 30-year-old bridge. An initial evaluation suggested that many of the cracks were the result of distortion-induced stresses. No evidence of unstable crack extension was observed. A comprehensive fatigue study was subsequently carried out to investigate the extent and cause of cracking and to evaluate possible long-term retrofit solutions. Based on the study findings, a retrofit plan was implemented that addressed details susceptible to distortion-induced cracking, end restraint cracking, and crack growth from embedded defects. Large-hole and loosening type retrofits were utilized to reduce the possibility of crack extension. The installed retrofits will significantly extend the remaining fatigue life and facilitate ease of inspection of this critical infrastructure link. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Bridge Structures IOS Press

Fatigue retrofits of the I-435 Missouri River Bridge

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Publisher
IOS Press
Copyright
Copyright © 2007 by IOS Press, Inc
ISSN
1573-2487
eISSN
1744-8999
DOI
10.1080/15732480601103697
Publisher site
See Article on Publisher Site

Abstract

The I-435 Bridge over the Missouri River at Kansas City, Missouri, consists of twin two-girder structures. Inspections by the Missouri Department of Transportation (MoDOT) in 2003 detected numerous cracks at the floor beam and lateral member connections throughout the 30-year-old bridge. An initial evaluation suggested that many of the cracks were the result of distortion-induced stresses. No evidence of unstable crack extension was observed. A comprehensive fatigue study was subsequently carried out to investigate the extent and cause of cracking and to evaluate possible long-term retrofit solutions. Based on the study findings, a retrofit plan was implemented that addressed details susceptible to distortion-induced cracking, end restraint cracking, and crack growth from embedded defects. Large-hole and loosening type retrofits were utilized to reduce the possibility of crack extension. The installed retrofits will significantly extend the remaining fatigue life and facilitate ease of inspection of this critical infrastructure link.

Journal

Bridge Structures – IOS Press

Published: Jan 1, 2007

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