Probability of bridge failure due to pier scour

P. A. Johnson, B. M. Ayyub

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

Methods have been presented for computing the probability of bridge failure due to pier scour either using a maximum scour depth model or a time-dependent model. The probability of failure provides the basis for a tool which can be used in decision-making for both design of pier foundations or assessment of existing foundations. In the design of a bridge pier, the engineer can use this method to evaluate various design alternatives as a function of parameters such as the size, shape, and depth of the pier. A particular level of risk over the life of the structure that is socially acceptable could be set by policy. If the computed probability of failure due to scour at an existing bridge is currently high or is approaching an unacceptably high level, engineers would be alerted to a need for inspection and possible control of the scour hole around the piers. Without an estimate of the probability of failure, these decisions would be based only on the engineer's judgment. The computed failure probabilities do not eliminate the need for judgment, but provide valuable supplemental information for decision-making.

Original languageEnglish (US)
Title of host publicationWater Resources Planning and Management
Subtitle of host publicationSaving a Threatened Resource - In Search of Solutions, Proceedings of the Water Resources Sessions at Water Forum
PublisherPubl by ASCE
Pages690-695
Number of pages6
ISBN (Print)0872628760
StatePublished - Dec 1 1992
Event1992 National Conference on Water Resources Planning and Management - Water Forum '92 - Baltimore, MD, USA
Duration: Aug 2 1992Aug 6 1992

Publication series

NameWater Resources Planning and Management: Saving a Threatened Resource - In Search of Solutions, Proceedings of the Water Resources Sessions at Water Forum

Other

Other1992 National Conference on Water Resources Planning and Management - Water Forum '92
CityBaltimore, MD, USA
Period8/2/928/6/92

All Science Journal Classification (ASJC) codes

  • Environmental Science(all)

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  • Cite this

    Johnson, P. A., & Ayyub, B. M. (1992). Probability of bridge failure due to pier scour. In Water Resources Planning and Management: Saving a Threatened Resource - In Search of Solutions, Proceedings of the Water Resources Sessions at Water Forum (pp. 690-695). (Water Resources Planning and Management: Saving a Threatened Resource - In Search of Solutions, Proceedings of the Water Resources Sessions at Water Forum). Publ by ASCE.