带钢暗梁的板柱结构边节点抗弯性能研究OACSTPCD

The slab-column structure has been widely used in engineering with its advantages of simple force transmission path and flexible arrangement.However,it also has deficiencies such as easy to result in punching shear failure.The current research mainly focuses on the middle joints in the slab-column structure,and there is relatively little research on the side joints,but the performance of the side joints is also critical to the structural safety.In this paper,the finite element model of reinforced concrete hollow floor with steel concealed beam-concrete filled square steel tubular column edge joint is firstly proposed and compared with other scholars'test results to verify the accuracy of the finite element model.Based on this verified finite element model,parametric study including concrete floor thickness,concrete strength of floor,flange thickness of steel concealed beam are analyzed.The study shows that the parameter changes have different effects on the positive and negative moment zones.The increase of floor thickness,steel concealed beam flange thickness,strength and height can improve the flexural bearing capacity of the joint,but the too thick floor slab and the increase floor concrete strength will reduce the deformation capacity of the joints.As for the change of square steel tubular thickness and axial compression ratio,it will have little effect on the flexural performance of the joint.