The conventional brace system is generally accepted lateral load resisting system for steel structures due to efficient story drift control and economic feasibility by frame materials decrease. But the lateral stiffness of the brace decreases following buckling in this system and buckling causes unstable structures with strength deterioration hysteresis performance. Buckling restrained brace system that performs stable behavior after yielding of core element prevented from buckling by tube element is better than conventional brace system in point of earthquake energy absorbing capacity. In this study, the seismic performance of the multi-story steel frames applied for brace and buckling restrained brace is respectively analyzed, so that, the damage of two systems is quantitatively evaluated by analyzing energy absorption capacity.

• 신승훈(부산대학교 건축공학과) | Shin, Seung Hoon 교신저자
• 오상훈(부산대학교 건축공학과) | Oh, Sang Hoon