Consideration of coupling of crack development and corrosion in assessing the reliability of reinforced concrete beams subjected to bending

Tiao Wang, Chunhe Li, Jian jun Zheng, Jürgen Hackl, Yao Luan, Tetsuya Ishida, Satya Medepalli

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

Most of the existing infrastructures (e.g., oversea bridges) are made of reinforced concrete (RC); therefore, their safety is of high priority for our society. RC structures undergo continuous deterioration due to a combination of chloride ingress and loading actions. Chloride-induced corrosion is thus one of the most serious threats. In this work a stochastic model is presented which couples degradation effects of crack development and corrosion progression based on physicochemical and mechanical models to estimate the probability of failure of a RC structure over time. To enable an efficient probabilistic assessment, a novel rapid numerical approach (RNA) is implemented for modeling the chloride diffusion. Numerical experiments show that the probability of corrosion failure is significantly underestimated if the coupled degradation effect of cracks and corrosion is not considered. Finally, parameter analyses are used to identify the effects of individual parameters, including external load level, supplementary cementitious materials and environmental temperature, on the probability of corrosion failure of RC beams over time.

Original languageEnglish (US)
Article number109095
JournalReliability Engineering and System Safety
Volume233
DOIs
StatePublished - May 2023

All Science Journal Classification (ASJC) codes

  • Safety, Risk, Reliability and Quality
  • Industrial and Manufacturing Engineering

Keywords

  • Chloride diffusion
  • Concrete crack
  • Corrosion progression
  • Degradation
  • Rebar
  • Structural reliability analysis

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