Capacity to carry static load at the corner joints of a rigid frame with concrete-filled circular steel pipes

摘要

This paper deals with load carrying capacity of corner joints between concrete filled steel columns and beams, with the help of loading tests and FEM analyses. For the loading tests, the model tests were carried out on four specimens by changing the position of stiffeners, the cross-section of beams. In the FEM analyses, six models were compared with each other to supplement the loading tests. As a result, it was found that each filling concrete in the corner hollow section has a constantly strong effect on the ultimate strength of corner joints regardless of whether the ring stiffeners are applied or not. The loading tests also confirmed that filling concrete circular steel pipes used for beam members were expected to two times post-yielding ductility to that of the filling concrete rectangular section member, the hollow circular section one.