Life-cycle reliability assessment of reinforced concrete bridges under multiple hazards

Thanapol Yanweerasak, Withit Pansuk, Mitsuyoshi Akiyama, Dan M. Frangopol

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

This paper proposes a novel probabilistic methodology for estimating the life-cycle reliability of existing reinforced concrete (RC) bridges under multiple hazards. The life-cycle reliability of an RC bridge pier under seismic and airborne chloride hazards is compared to that of a bridge girder under traffic and airborne chloride hazards. When conducting a life-cycle reliability assessment of existing RC bridges, observational data from inspections can provide the corrosion level in reinforcement steel. Random variables related with the prediction of time-variant steel weight loss can be updated based on the inspection results using Sequential Monte Carlo Simulation (SMCS). This paper presents a novel procedure for identifying the hazards that most threaten the structural safety of existing RC bridges, as well as the structural components with the lowest reliability when these bridges are exposed to multiple hazards. The proposed approach, using inspection results associated with steel weight loss, provides a rational reliability assessment framework that allows comparison between the life-cycle reliabilities of bridge components under multiple hazards, helping the prioritisation of maintenance actions. The effect of the number of inspection locations on the updated reliability is considered by incorporating the spatial steel corrosion distribution. An illustrative example is provided of applying the proposed life-cyle reliability assessment to a hypothetical RC bridge under multiple hazards.

Original languageEnglish
Pages (from-to)1011-1024
Number of pages14
JournalStructure and Infrastructure Engineering
Volume14
Issue number7
DOIs
Publication statusPublished - 2018 Jul 3

Keywords

  • Life-cycle reliability
  • airborne chloride hazard
  • inspection
  • multiple hazards
  • seismic hazard
  • spatial variability
  • steel corrosion
  • traffic load
  • updating

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Safety, Risk, Reliability and Quality
  • Geotechnical Engineering and Engineering Geology
  • Ocean Engineering
  • Mechanical Engineering

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