|
Title |
Seismic Fragility Analysis on Nuclear Containment Structure considering the Material Degradation
|
|
Authors |
김찬영(Chan-Young Kim) ; 신명수(Myoung-Su Shin) |
|
DOI |
https://doi.org/10.4334/JKCI.2022.34.3.291 |
|
Keywords |
원자력 발전소; 격납구조물; 지진취약도; 비선형 구조해석; 알칼리 실리카 반응 nuclear power plant; containment structure; seismic fragility; nonlinear structural analysis; alkali-silica reaction |
|
Abstract |
This study focuses on conducting fragility analysis and estimating the change in fragility curve and the structural capacity due to the alkali-silica reaction (ASR) by using nonlinear seismic analysis. The shell element and nonlinear concrete constitutive model of Opensees have been adopted to conduct the nonlinear seismic analysis. As a result, the HCLPF of the containment structure is estimated as 1.407 g, and it is comparatively higher than the value reported by previous researches which use a lumped mass model. In addition, the median capacity of the containment structure is about 2.704 g when it is under the effects of ASR corresponding to the median longitudinal expansion of 0.013 %. Consequently, the median capacity of the containment structure is decreased about 17.5 % with the aforementioned level of alkali-silica reaction.
|