Seismic Performance Evaluation of Tube Systems with Buckling Restrained Braces

비좌굴 가새가 설치된 튜브 시스템의 내진성능 평가

In this paper 35- and 72-story tube system and trussed tube system were designed and their seismic performances were evaluated by nonlinear static analysis. According to the analysis results, the tube system structures retained high stiffness and strength; however they showed brittle failure mode due to the yielding of columns. In the case of trussed tube system, columns in the side-side buckled first followed by the buckling of the braces. When buckling-restrained braces were applied, plastic hinges formed in the lower stories gradually spreads to the higher stories, resulting in ductile behavior.