Fault tree analysis of bridge failure due to scour and channel instability

Research output: Contribution to journalArticle

36 Citations (Scopus)

Abstract

Fault tree analysis is a systematic method of analyzing events that lead to an undesirable event. Fault trees can be used to assess the probability of failure of a system (or top event), to compare design alternatives, to identify critical events that will significantly contribute to the occurrence of the top event, and to determine the sensitivity of the probability of failure of the top event to various contributions of basic events. In this paper, fault tree analysis is used to determine the probability of failure of a bridge due to scour and other geomorphic channel instabilities. This analysis permits an examination of a very complex system of interactions and processes that are not well understood. Minimal knowledge regarding the actual processes of scour and channel instability is required for a fault tree analysis. Three examples of analyses for actual bridges are provided showing different combinations of scour (local and contraction) and geomorphic instabilities (channel widening and degradation) at both the abutments and piers. Riprap placed at the abutments for protection is also included in the analyses.

Original languageEnglish (US)
Pages (from-to)35-41
Number of pages7
JournalJournal of Infrastructure Systems
Volume5
Issue number1
DOIs
StatePublished - Mar 1 1999

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Fault tree analysis
Scour
scour
event
Piers
riprap
Large scale systems
pier
contraction
Degradation
system of action
analysis
examination

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering

Cite this

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abstract = "Fault tree analysis is a systematic method of analyzing events that lead to an undesirable event. Fault trees can be used to assess the probability of failure of a system (or top event), to compare design alternatives, to identify critical events that will significantly contribute to the occurrence of the top event, and to determine the sensitivity of the probability of failure of the top event to various contributions of basic events. In this paper, fault tree analysis is used to determine the probability of failure of a bridge due to scour and other geomorphic channel instabilities. This analysis permits an examination of a very complex system of interactions and processes that are not well understood. Minimal knowledge regarding the actual processes of scour and channel instability is required for a fault tree analysis. Three examples of analyses for actual bridges are provided showing different combinations of scour (local and contraction) and geomorphic instabilities (channel widening and degradation) at both the abutments and piers. Riprap placed at the abutments for protection is also included in the analyses.",
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Fault tree analysis of bridge failure due to scour and channel instability. / Johnson, Peggy Ann.

In: Journal of Infrastructure Systems, Vol. 5, No. 1, 01.03.1999, p. 35-41.

Research output: Contribution to journalArticle

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