Reliability assessment of existing RC bridges based on small samples of inspection data

Lei Wang, Yafei Ma, Tishun Peng, Yongming Liu, Jianren Zhang

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

Abstract

For old reinforced concrete (RC) bridges subject to environmental attack, the data for reliability assessment sometimes cannot be recorded or collected precisely due to human errors, machine errors, or some other unexpected situations. Uncertainties due to limited number of experimental data, incomplete inspection information, as well as the intrinsic randomness of random variables affect the reliability assessment of the existing RC bridges.A reliability assessment methodology under small samples is developed considering inspection results and expert experiences in this paper. The study considers the influential parameters of structural resistance as fuzzy variables.The membership function is employed to describe fuzzy characteristic of small detection samples. The fuzzy variables are transformed to the equivalent random variables and the traditional JC method is used to compute the reliability index. The proposed methodology is illustrated and validated with the reliability assessment of a fabricated RC bridge. The sensitivity of the concrete strength, the reinforcement strength and the corrosion loss on the reliability analysis are also discussed. The results show that the fuzzy range of the corrosion loss and the reinforcement strength have significant effect on structural reliability, which indicating the assessment of the reinforcing bars corrosion should be more concerned in practice measurement of the existing bridges.

Original languageEnglish (US)
Title of host publicationSafety, Reliability, Risk and Life-Cycle Performance of Structures and Infrastructures - Proceedings of the 11th International Conference on Structural Safety and Reliability, ICOSSAR 2013
Pages3819-3825
Number of pages7
StatePublished - Dec 1 2013
Event11th International Conference on Structural Safety and Reliability, ICOSSAR 2013 - New York, NY, United States
Duration: Jun 16 2013Jun 20 2013

Publication series

NameSafety, Reliability, Risk and Life-Cycle Performance of Structures and Infrastructures - Proceedings of the 11th International Conference on Structural Safety and Reliability, ICOSSAR 2013

Other

Other11th International Conference on Structural Safety and Reliability, ICOSSAR 2013
CountryUnited States
CityNew York, NY
Period6/16/136/20/13

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Safety, Risk, Reliability and Quality

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  • Cite this

    Wang, L., Ma, Y., Peng, T., Liu, Y., & Zhang, J. (2013). Reliability assessment of existing RC bridges based on small samples of inspection data. In Safety, Reliability, Risk and Life-Cycle Performance of Structures and Infrastructures - Proceedings of the 11th International Conference on Structural Safety and Reliability, ICOSSAR 2013 (pp. 3819-3825). (Safety, Reliability, Risk and Life-Cycle Performance of Structures and Infrastructures - Proceedings of the 11th International Conference on Structural Safety and Reliability, ICOSSAR 2013).