Journal of the Computational Structural Engineering Institute of Korea (한국전산구조공학회논문집)

Computational Structural Engineering Institute of Korea (한국전산구조공학회)
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Nonlinear Seismic Analysis of a Three-dimensional Unsymmetrical Reinforced Concrete Structure

3차원 비대칭 철근콘크리트 구조물의 비선형 지진응답해석

  • Lim, Hyun-Kyu (Department of Civil Engineering, Hongik University) ;
  • Lee, Young-Geun (Department of Civil Engineering, Hongik University) ;
  • Kang, Jun Won (Department of Civil Engineering, Hongik University) ;
  • Chi, Ho-Seok (Department of Structural Systems & Site Safety Evaluation, Korea Institute of Nuclear Safety) ;
  • Cho, Ho-Hyun (Department of Structural Systems & Site Safety Evaluation, Korea Institute of Nuclear Safety) ;
  • Kim, Moon-Soo (Department of Structural Systems & Site Safety Evaluation, Korea Institute of Nuclear Safety)
  • 임현규 (홍익대학교 토목공학과) ;
  • 이영근 (홍익대학교 토목공학과) ;
  • 강준원 (홍익대학교 토목공학과) ;
  • 지호석 (한국원자력안전기술원 구조부지평가실) ;
  • 조호현 (한국원자력안전기술원 구조부지평가실) ;
  • 김문수 (한국원자력안전기술원 구조부지평가실)
  • Received : 2014.06.17
  • Accepted : 2014.07.30
  • Published : 2014.10.31
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Abstract

This paper presents the seismic performance of a geometrically unsymmetrical reinforced concrete building considering torsional effect and material nonlinearity of concrete and steel. The reinforced concrete building is a structure for seismic performance evaluation in the SMART-2013 international benchmark program. Nonlinear constitutive models for concrete and steel were constructed, and their numerical performance was demonstrated by various local tests. Modal analysis showed that the first three natural frequencies and mode shapes were close to the experimental results from the SMART-2013 program. In the time history analysis for low-intensity seismic loadings, displacement and acceleration responses at sampling points were similar to the experimental results. In the end, nonlinear time history analysis was conducted for Northridge earthquake to predict the behavior of the reinforced concrete structure under high-intensity seismic loadings.

본 논문은 철근콘크리트 구조물의 지진해석에 관한 국제 벤치마크 프로젝트인 SMART-2013을 통해 3차원 비대칭 철근콘크리트 건물의 고유진동수와 재료 비선형성을 고려한 지진응답을 계산한 결과를 제시한다. 이를 위해 콘크리트와 철근의 비선형 재료모델을 구성하고 대표부피요소에 대한 국부테스트를 수행하여 비선형 모델의 성능을 평가하였다. 이러한 SMART-2013 철근콘크리트 건물의 비선형 유한요소모델에 대해 모드해석과 저강도 지진하중에 대한 선형 시간이력해석을 수행한 결과, 구조물의 고유진동수, 변위 및 가속도 시간이력이 SMART-2013 프로젝트에서 제시한 실험값들과 유사하였다. 또한 Northridge 지진에 대한 변위 및 가속도 응답의 시간이력과 최대층간상대변위의 응답스펙트럼을 계산하여 고강도 지진하중에 대한 이 철근콘크리트 건물의 거동을 평가하였다.

Keywords

References

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