Fault Tree Analysis of Schoharie Creek Bridge Collapse
Publication: Journal of Performance of Constructed Facilities
Volume 21, Issue 4
Abstract
The United States has witnessed several bridge collapses that have resulted in human fatalities. One such failure was the Schoharie Creek Bridge (1987), which motivated the improvement of bridge management policies and procedures. This paper offers a detailed review of the events that resulted in this bridge failure through the use of fault tree analysis. A fault tree is a graphical depiction of the various failure paths that lead to an undesirable outcome. The tree presented considers a host of catastrophic events ranging from vessel collision to fire. Fault trees also provide quantitative assessment and comparison of different failure mechanisms. The results of this analysis present scour as the source of the collapse of this bridge, which was in reality the root cause. Knowledge of the vulnerabilities particular to a bridge aids in the management of similar bridge types, allowing focus upon critical aspects. Recognition of historical bridge failures offers awareness to current bridge engineers and managers that aids in the decision making that promotes public safety and structure preservation. Lessons learned will help avoid similar catastrophic failures in the future.
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Acknowledgments
Support from National Science Foundation (NSF) Career Development Award No. CMS-9702656 is appreciated, and the NSF-funded Engineering Research Center, CenSSIS (EEC-9986821), has also provided some support.
References
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© 2007 ASCE.
History
Received: Jan 3, 2006
Accepted: Jun 20, 2006
Published online: Aug 1, 2007
Published in print: Aug 2007
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