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Title |
Stiffness Degradation Induced by Seismic Loading on a RC Shear Wall
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DOI |
https://doi.org/10.11112/jksmi.2022.26.3.48 |
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Keywords |
지진하중; 철근콘크리트; 전단벽; 유한요소해석; 콘크리트 균열 Seismic loading; Reinforced concrete; Shear wall; Finite element analysis; Concrete crack |
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Abstract |
This research describes a quantitative procedure used to estimate the effect of concrete cracking on stiffness degradation of concrete shear walls and provides analytical references for the seismic design of concrete shear walls. As preliminary research on the seismic response of concrete shear walls, nonlinear transient analysis was performed with commercial FE software. The study presents the nonlinear time history analysis results in terms of concrete damage and cracking behavior induced by seismic input motions. By varying the input motions, concrete strength and shear wall thickness, the seismic responses of a shear wall were examined with nonlinear time history analysis, and the progressive cracking behavior and corresponding hysteresis loop were described. Based on the analysis results, frequency and stiffness degradation of the shear wall from progressive concrete damage and cracking were captured with respect to the seismic levels. The results of this study suggest that stiffness degradation from concrete cracking should be appropriately considered when determining the seismic capacity of RC shear wall structures.
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