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Estimation of Interstory Drift for Moment Resisting Reinforced Concrete Frames Using Equivalent SDOF System

등가 1자유도계를 이용한 철근콘크리트 골조건물의 층간변위 응답 산정

  • 강호근 (거창전문대학 건축.인테리어과) ;
  • 전대한 (동서대학교 건축공학과)
  • Published : 2004.10.01

Abstract

To evaluate the seismic capacity of a multistorey building structures in performance based seismic design, it is needed to convert MDOF model into equivalent SDOF model. This paper presents predictions for interstory drift of multistorey structures using method of converting a MDOF system into an equivalent SDOF model. The principal objective of this investigation is to evaluate appropriateness of converting method through performing nonlinear time history analysis of a multistory building structures and an equivalent SDOF model. Comparing the interstory drift of multistorey structures calculated by time history analysis and those evaluated by an equivalent SDOF model, the adequacy and the validity of converting method is verified. The conclusion of this study is following; A method of converting a MDOF system into an equivalent SDOF model through the nonlinear time history response analysis is valid. Inelastic first mode shapes are expected to be more accurate than elastic first mode shapes in obtaining interstory drift of multistorey structures from equivalent SDOF model.

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