This study evaluates seismic risk of steel ordinary concentrically braced frames. Based on the risk integral concept, the collapse probabilities in 50 years are calculated for the 3-, 5- and 10-story braced frames. The evaluation results present that the collapse probabilities in 50 years are increased for the higher braced frames although they are identically designed according to the current domestic seismic design code.

• 신동현(서울시립대학교 건축공학과, 박사과정) | Shin, Dong Hy
• 김형준(서울시립대학교 건축공학과 교수, 공학박사) | Kim, Hyung