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Development of Stochastic Seismic Performance Evaluation Method for Structural Performance Point Based on Capacity Spectrum Method

역량스펙트럼법을 통한 구조물 성능점의 확률적 기반 내진성능평가기법 개발

  • Choi, Insub (Department of Architectural Engineering, Yonsei University) ;
  • Jang, Jisang (Department of Architectural Engineering, Yonsei University) ;
  • Kim, JunHee (Department of Architectural Engineering, Yonsei University)
  • 최인섭 (연세대학교 건축공학과) ;
  • 장지상 (연세대학교 건축공학과) ;
  • 김준희 (연세대학교 건축공학과)
  • Received : 2017.11.10
  • Accepted : 2017.12.11
  • Published : 2017.12.29

Abstract

In this study, a method of probabilistic evaluation of the performance point of the structure obtained by capacity spectrum method (CSM) is presented. The performance point of the 4-story and 1-bay steel structure was determined by using CSM according to ATC-40. In order to analyze whether the demand spectrums exceed the performance limit of the structure, the limit displacements are derived for the performance limit of the structure defined from the plastic deformation angle of the structural member. In addition, by selecting a total of 30 artificial seismic wave having the response spectrum similar to the design response spectrum, the fragility curves were derived by examining whether the response spectrum obtained from the artificial seismic wave were exceeded each performance limit according to the spectral acceleration. The maximum likelihood method was used to derive the fragility curve using observed excess probabilities. It has been confirmed that there exists a probability that the response acceleration value of the design response spectrum corresponding to each performance limit exceeds the performance limit. This method has a merit that the stochastic evaluation can be performed considering the uncertainty of the seismic waves with respect to the performance point of the structure, and the analysis time can be shortened because the incremental dynamic analysis (IDA) is not necessary.

Acknowledgement

Supported by : 국토교통부

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