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Seismic Improvement of Staggered Truss Systems using Buckling Restrained Braces

비좌굴 가새를 이용한 스태거드 트러스 시스템의 내진성능향상

  • 김진구 (성균관대학교 건축공학과) ;
  • 이준호 (성균관대학교 건축공학과)
  • Published : 2006.04.30

Abstract

In this paper the seismic performances of 4, 10, and 30-story staggered truss systems (STS) were evaluated by observing the force-displacement relationship up io failure. The results were compared with the seismic performance of conventional moment resisting frames and braced frames. According to the analysis results, the STS showed relatively satisfactory lateral load resisting capability. However, in the mid- to high-rise STS, plastic hinges formed first at the chords were transferred to vertical members of the vierendeel panels, which formed a week link and subsequently leaded to brittle collapse of the structure. Therefore to enhance the ductility of STS it would be necessary to reinforce the vertical bracing members of the virendeel panels so that the plastic hinges, once toned in cord members of a virendeel panel, spread out to virendeel panels of neighboring stories.

Keywords

staggered truss system;buckling restrained brace;inelastic behavior;response modification factor;seismic design

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