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http://dx.doi.org/10.14346/JKOSOS.2022.37.6.81

Seismic Fragility Analysis of Reinforced Concrete Shear Walls Considering Material Deterioration  

Myung Kue, Lee (Department of Civil and Environmental Engineering, Jeonju University)
Jang Ho, Park (Department of Civil Systems Engineering, Ajou University)
Publication Information
Journal of the Korean Society of Safety / v.37, no.6, 2022 , pp. 81-88 More about this Journal
Abstract
It is necessary to better understand the effect of age-related degradation on the performance of reinforced concrete shear walls in nuclear power plants in order to ensure their structural safety in the event of earthquakes. Therefore, this paper studies seismic fragility of the typical shear wall in nuclear power plants under earthquake excitation Reinforced concrete shear wall is composed of wall, horizontal and vertical flanges. Due to characteristics of its geometry, it is difficult to predict the ultimate behavior of shear wall under earthquake excitation. In this study, for more realistic numerical simulation, the Latin Hyper-Cube (LHC) simulation technique was used to generate uncertain variables for the material properties of concrete shear walls. The effects of crack, characteristics of inelastic behavior of concrete, and loss of cross section were considered in the nonlinear finite element analysis. The effects of aging-related deterioration were investigated on the performance of reinforced concrete shear walls through analysis of undegraded concrete shear walls and degraded concrete shear walls. The resulting seismic fragility curves present the change of performance of concrete shear wall due to age-related degradation.
Keywords
shear wall; seismic fragility; material deterioration; Latin Hyper-Cube method;
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