A Study on the Error Characteristics in Response Spectrum Analysis

응답스펙트럼해석의 오차특성에 관한 연구

  • 최형철 (동아대학교 건축공학과) ;
  • 배익주 (동아대학교 건축공학과) ;
  • 강병도 (거창전문대학 건축과) ;
  • 김재웅 (동아대학교 건축공학과)
  • Published : 1998.10.01

Abstract

Response spectrum analysis method(RSA) rather than time history analysis method(THA) continues to e used by the profession for evaluating maximum dynamic responses of structures subjected to earthquake excitations. Nevertheless, this simple and practical method can cause significant errors in some cases with unproper modal combination method and so on. To obtain more exact responses based n RSA many studies have been carried out considering displacement of top story, base shear and overturning moment. The purpose of this study is to verify error characteristics in RSA with respect to various responses including displacement shear force and overturning moment of each story. It's shown that RSA appears to yield underestimated responses when compared to THA calculations. Also, errors involved in RSA computations grow with an increase in total number of stories.

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