组合效应对腹板削弱型梁柱节点的影响

采用数值模拟方法分析了混凝土楼板组合效应对钢框架腹板开圆孔削弱型梁柱节点的影响，着重讨论了节点承栽力、弹塑性阶段的应变分布、梁塑性区的产生和扩展情况，并与未考虑组合效应此类节点的性能进行了对比．削弱截面与柱的距离和削弱半径是重要的削弱参数，决定了腹板削弱型节点塑性区的扩展特征．研究结果表明，组合效应对腹板开圆孔削弱型梁柱节点区域的应变分布和塑性区扩展影响显著，其削弱参数的确定须充分考虑楼板组合效应．

Effect of composite action on the beam-to-column connections with opening in beam web

In this paper, a finite element model was built to simulate beam-to-colunm connection with opening in beam and concrete slab by using the software ABAQUS. Numerical analyses were carried out to study the effect of composite action on beam-to-column connection with opening in beam. The loading capacity, strain distribution on elastic-plastic stages and the development of plastic area of the connections with concrete slab were discussed. Behaviors between the connections with concrete slab and without concrete slab were compared. The distance from column to center of the opening and cut- ting radius of the opening in beam web were the main cutting parameters, which controlled the devel- opment of plastic area of connections considering composite action. The numerical results showed that composite action obviously affects the strain distribution and the development of plastic area on connec- tions with opening in beam web, and the composite action should be taken into account for the deter- minatinn nf c＇uttlncr n~r~mot~-~