Journal of the Earthquake Engineering Society of Korea (한국지진공학회논문집)

Earthquake Engineering Society of Korea (한국지진공학회)
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Seismic Fragility Assessment for Korean High-Rise Non-Seismic RC Shear Wall Apartment Buildings

국내 고층 비내진 철근콘크리트 벽식 아파트의 지진취약도 평가

  • Jeon, Seong-Ha (Industry-Academic Cooperation Foundation, Incheon National University) ;
  • Shin, Dong-Hyun (Department of Architecture, Incheon National University) ;
  • Park, Ji-Hun (Division of Architecture and Urban Design, Incheon National University)
  • 전성하 (인천대학교 산학협력단) ;
  • 신동현 (인천대학교 일반대학원 건축학과) ;
  • 박지훈 (인천대학교 도시건축학부)
  • Received : 2020.09.28
  • Accepted : 2020.10.14
  • Published : 2020.11.01
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Abstract

Seismic fragility was assessed for non-seismic reinforced concrete shear walls in Korean high-rise apartment buildings in order to implement an earthquake damage prediction system. Seismic hazard was defined with an earthquake scenario, in which ground motion intensity was varied with respect to prescribed seismic center distances given an earthquake magnitude. Ground motion response spectra were computed using Korean ground motion attenuation equations to match accelerograms. Seismic fragility functions were developed using nonlinear static and dynamic analysis for comparison. Differences in seismic fragility between damage state criteria including inter-story drifts and the performance of individual structural members were investigated. The analyzed building had an exceptionally long period for the fundamental mode in the longitudinal direction and corresponding contribution of higher modes because of a prominently insufficient wall quantity in such direction. The results showed that nonlinear static analyses based on a single mode tend to underestimate structural damage. Moreover, detailed assessments of structural members are recommended for seismic fragility assessment of a relatively low performance level such as collapse prevention. On the other hand, inter-story drift is a more appropriate criterion for a relatively high performance level such as immediate occupancy.

Keywords

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