This paper is presented an experimental studies on bond stress between steel and concrete in concrete filled steel tubes. In the actual building frames, vertical dead and live loads on beams are usually transferred to columns by beam-to-column connections. In case when concrete filled steel tubes are used as columns of an actual building frame which has a simple connection, shear forces in the beam ends are not directly transferred to the concrete core but directly to the steel tube. Provided that the bond effect between steel tube and concrete core should not be expected, none of the end shear in the beams would be transferred to the concrete core but only to the steel tube. Therefore, it is important to investigate the bond strength between steel tube and concrete core in the absence of shear connectors.

• 박성무(영남대학교 건축학부 교수) | Park, Sung-Moo
• 김성수( 청주대학교 건축공학과 교수) | 김성수
• 김원호( 영남대학교 대학원 박사과정) | 김원호
• 이형석( 영남대학교 대학원 박사과정) | 이형석