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http://dx.doi.org/10.5000/EESK.2010.14.6.011

Seismic Behavior of a Five-story RC Structure Retrofitted with Buckling-Restrained Braces Using Time-dependent Elements  

Shin, Ji-Uk (세종대학교 건축공학과)
Lee, Ki-Hak (세종대학교 건축공학과)
Lee, Do-Hyung (배재대학교 건설환경철도공학과)
Jeong, Seong-Hoon (인하대학교 건축학부)
Publication Information
Journal of the Earthquake Engineering Society of Korea / v.14, no.6, 2010 , pp. 11-21 More about this Journal
Abstract
This study presents seismic responses of 5-story reinforced concrete structures retrofitted with the buckling-restrained braces using a time-dependent element. The time-dependent element having birth and death times can freely be activated within the user defined time intervals during the time history analysis. The buckling-restrained brace that showed the largest energy dissipation capacity among the test specimens in previous research was used for retrofitting the RC buildings in this study. It was assumed that the first story of the damaged building under the first earthquake was retrofitted with the buckling-restrained braces considered as the time-dependent element before the second of the successive earthquakes occurs. Under this assumption, this paper compares seismic responses of the RC structures with the time-dependent element subjected to the successive earthquake. Subjected to the second earthquake, it was observed that activation of the BRB systems largely decreases deformation of the moment frame where the damage was concentrated under the first earthquake. However, damages to the shear wall systems were increased after activation of the BRB systems. Since the cumulative damages of the shear wall systems were infinitesimal compared with the retrofit effect of the moment frame, the BRB system was effective under the successive earthquake.
Keywords
Time-Dependent element; Buckling-restrained brace; Successive earthquake; Retrofit effect; Cumulative damage;
Citations & Related Records
Times Cited By KSCI : 6  (Citation Analysis)
연도 인용수 순위
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