吉林大学学报(工学版) ›› 2013, Vol. 43 ›› Issue (05): 1247-1252.doi: 10.7964/jdxbgxb201305016

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Bridge system mean time to failure with load-sharing process

ZHANG Li-ye, GUO Xue-dong, DONG Li-juan   

  1. College of Transportation, Jilin University, Changchun 130022, China
  • Received:2012-04-27 Online:2013-09-01 Published:2013-09-01

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Abstract:

Based on the existing reliability analysis of bridge structure system, the Markov process steady-state probabilities are used as the reliability assessment indexes of bridge system. The load-sharing process in bridge working condition is analyzed by modification of the system reliability relation matrix. Laplace transforms of the bridge system reliability function and state equations are conducted. Then state equations obtained after the modification of the system reliability relation matrix are solved to deduce the calculation method of Bridge System Mean Time To failure (BSMTTF). A case study is carried out, which indicates that the BSMTTF is closely related to the component target reliability indexes. The higher the bridge system reliability index the longer the BSMTTF, and the higher the component target reliability index the more obvious the increase in the BSMTTF.

Key words: structural engineering, system reliability, bridge, load-sharing, mean time to failure(MTTF), Laplace transform, the reliability index

CLC Number: 

  • U447

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