다층 구조물과 등가 단자유도계의 에너지 요구량 비교

Comparison of Energy Demand in Multi-Story Structures and Equivalent SDOF Systems

  • 최현훈 (성균관대학교 건축공학과) ;
  • 원영섭 (성균관대학교 건축공학) ;
  • 김진구 (성균관대학교 건축공학과)
  • 발행 : 2003.04.01

초록

In energy-based design, the structures are generally transformed into equivalent SDOF systems to obtain the input and the dissipated energy. In this study the energy demands in multi-story structures were compared with that of equivalent single degree of freedom systems to validate the transformation method. Three-, eight-, and twenty-story steel moment-resisting frames and buckling restrained braced frames are compared with those of equivalent single degree of freedom systems. Sixty earthquake ground motions recorded in different soil conditions were used to compute the input and hysteretic energy demands in model structures. According to the analysis results, in 3 and 8-story structures the hysteretic energy demands computed in the equivalent SDOF structures are compatible with those computed in the original MDOF structures, while in the 20-story structures the transformed equivalent structures underestimated the hysteretic energy demands.

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