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Repair Cost Analysis for Chloride Ingress on RC Wall Considering Log and Normal Distribution of Service Life

로그 및 정규분포 수명함수를 고려한 콘크리트 벽체의 염해 보수비용 산정

Yoon, Yong-Sik;Kwon, Seung-Jun
윤용식;권성준

  • Received : 2018.09.13
  • Accepted : 2018.11.28
  • Published : 2019.03.01

Abstract

Management plan with repairing is essential for RC structures exposed to chloride attack since durability problems occur with extended service life. Conventionally deterministic method is adopted for evaluation of service life and repair cost, however more reasonable repair cost can be obtained through continuous repair cost from probabilistic maintenance technique. Unlike the previous researches considering only normal distribution of life time, PLTFs (Probabilistic Life Time Function) which can be capable of handling log and normal distributions are attempted for initial and repair service life, and repair cost is evaluated for OPC and GGBFS concrete. PLTF with log distributions in initial service life is more effective to save repair cost since it is more dominant after average than normal distribution. Repair cost in GGBFS concrete decreases to 30% of OPC concrete due to longer initial service life and lower repairing event. The proposed PLTF from the work can handle not only normal distributions but also log distributions for initial and repair service life, so that it can provide more reasonable repair cost evaluation.

Keywords

Chloride attack;Probabilistic maintenance;PLTF;Log distribution

Acknowledgement

Supported by : 한국연구재단