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Application of Energy Dissipation Capacity to Earthquake Design

내진 설계를 위한 에너지 소산량 산정법의 활용

  • 임혜정 (서울대학교 공과대학 건축학과 건축구조시스템 연구실) ;
  • 박홍근 (서울대학교 공과대학 건축학과) ;
  • 엄태성 (서울대학교 공과대학 건축학과 건축구조시스템 연구실)
  • Published : 2003.12.01

Abstract

Traditional nonlinear static and dynamic analyses do not accurately estimate the energy dissipation capacity of reinforced concrete structure. Recently, simple equations which can accurately calculate the energy dissipation capacity of flexure-dominated RC members, were developed in the companion study. In the present study, nonlinear static and dynamic analytical methods improved using the energy-evaluation method were developed. For nonlinear static analysis, the Capacity Spectrum Method was improved by using the energy-spectrum curve newly developed. For nonlinear dynamic analysis, a simplified energy-based cyclic model of reinforced concrete member was developed. Unlike the existing cyclic models which are the stiffness-based models, the proposed cyclic model can accurately estimate the energy dissipating during complete load-cycles. The procedure of the proposed methods was established and the computer program incorporating the analytical method was developed. The proposed analytical methods can estimate accurately the energy dissipation capacity varying with the design parameters such as shape of cross-section, reinforcement ratio and arrangement, and can address the effect of the energy dissipation capacity on the structural performance under earthquake load.

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