FOSM법에 의한 항만콘크리트 구조물의 철근부식 평가
- FOSM법에 의한 항만콘크리트 구조물의 철근부식 평가
- Reliability Assessment of Corrosion Initiation of Harbor Concrete Structure using FOSM
- 한상훈; 박우선
- KIOST Author(s)
- Park, Woo Sun(박우선)
- Due to the uncertainty of variables in durability model, the probabilistic approach is increasing. Monte Carlo Simulation (MCS) is an easily accessible method, but requires a lot of repeated operations. This paper evaluated the effectiveness of First Order Second Moment method (FOSM), which is more convenient and time saving method than MCS, to predict the corrosion initiation in harbor concrete structure. Mean Value First Order Second Moment method (MV FOSM) and Advanced First Order Second Moment method (AFOSM) are applied to the error function solution of Fick's second law modeling chloride diffusion. Reliability index and failure probability based on MV FOSM and AFOSM are compared with the results by MCS. The comparison showed that AFOSM and MCS predict similar reliability indexes and MV FOSM underestimates the probability of corrosion initiation by chloride attack. Also, the sensitivity of variables in durability model to failure probability was evaluated on the basis of AFOSM. The results showed that AFOSM is a simple and efficient method to estimate the possibility of corrosion initiation in harbor concrete structures.
- Key Engineering Materials, v.385, no.1, pp.621 - 624, 2008
- Related Researcher
Development of harbor structures,Analysis of harbor structures,Design of harbor structures,항만구조물개발,항만구조물해석,항만구조물설계
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