Time-Dependent Risk Assessment of Bridges Based on Cumulative-Time Failure Probability
Publication: Journal of Bridge Engineering
Volume 21, Issue 12
Abstract
This paper presents an approach for the time-dependent risk assessment of bridges based on cumulative-time failure probability of bridge members. The cumulative-time failure probabilities of girders under traffic load and pier columns under scour are computed. Different scenarios of lane closure are identified and expressed in terms of failure events of bridge components. Two extreme correlation cases among the failure modes of bridge components are considered. After estimating the occurrence probabilities and consequences associated with these scenarios, the time-dependent risks are assessed. Considering the entire history of loadings and structural deteriorating processes by using the cumulative-time approach provides a more realistic basis for risk assessment of bridges than the approach based on annual failure probabilities.
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Acknowledgments
Support from the U.S. National Science Foundation through Grant CMMI-1537926 and U.S. Federal Highway Administration Cooperative Agreement Award DTFH61-11-H-00027 to Lehigh University is gratefully acknowledged. The opinions and conclusions presented in this paper are those of the authors and do not necessarily reflect the views of the sponsoring organizations.
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Information & Authors
Information
Published In
Journal of Bridge Engineering
Volume 21 • Issue 12 • December 2016
Copyright
© 2016 American Society of Civil Engineers.
History
Received: Jan 19, 2016
Accepted: Jun 22, 2016
Published online: Aug 4, 2016
Published in print: Dec 1, 2016
Discussion open until: Jan 4, 2017
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