The chevron braced frames designed without considering the unbalanced force induced in floor beams tend to become unstable when they are subjected to a seismic load. To enhance the seismic performance of OCBF chevron braced frames the effect the following three retrofit schemes are investigated: buckling-restrained braces, zipper columns, V-shaped cables. According to analysis results of unretrofitted model structures, collapse mechanism occurred in a certain story when they were subjected to design level seismic load. However in the retrofitted structures the plastic hinges were distributed in many stories, and the amount of plastic deforrnation was also decreased.

• 김진구(성균관대학교 건축공학부 부교수) | Kim, Jinkoo 책임저자
• 김지웅(성균관대학교 석사과정) | Kim, JiWoong