반복하중을 받는 CFT 합성골조의 상·하부 ㄱ형강 접합부의 휨모멘트 내력

초록

ABSTRACT ： This paper presents results from a systematic finite element study on the bending moment resisting capacity of a top and seat angle connection for a CFT composite frame subjected to cyclic loading. The three-dimensional nonlinear finite element models are constructed to investigate the rotational stiffness, bending moment capacity, and failure modes of the partially restrained composite CFT connections. A wide scope of additional structural behaviors explain the different influences of the top and seat angle connections parameters, such as the different thickness of connection angles and the gage distances of high strength steel connection bar. The moment-rotation angle relationships obtained from the finite element analysis are compared with those from Richard’s theoretical equation.