箱形截面钢梁与钢骨混凝土剪力墙刚性连接节点滞回性能有限元分析

Finite Element Analysis on Hysteretic Behaviors of the Rigid Joint of Box-section Steel Beam to Steel RC Wall

以实际工程为背景,运用有限元软件ABAQUS,对箱形截面钢梁与钢骨混凝土剪力墙刚性连接节点在低周往复荷载作用下的滞回性能进行数值模拟研究,同时对节点混凝土强度、钢梁翼缘厚度、端柱含钢率及端柱配箍率等对节点滞回性能的影响进行了参数分析,以期对其抗震性能的评价建立基础。研究结果表明:在"强墙弱梁"的实际设计背景下,箱形截面钢梁与钢骨混凝土剪力墙刚性连接节点具有较好的承载力和延性特征。钢梁翼缘厚度对节点的屈服弯矩略有影响,但是对节点的延性性能影响显著。混凝土强度、端柱含钢率及端柱配箍率对节点的滞回性能影响很小,可以忽略。

Based on a practical engineering project,the hysteretic behaviors of the rigid joint of box-section steel beamto steel reinforced concrete（ RC） wall under cyclic loading were studied by using the finite element analysis software ABAQUS. The effects of the concrete strength,the flange thickness of steel beam,steel ratio and stirrup ratio of the end column to the hysteretic behaviors of joints were also analyzed in order to establish the basis for evaluating the seismic performance of the joint. The results showed thatthe rigid joint of boxsection steel beam to steel RC wall under cyclic load had good bearing capacity and ductility. With the design condition of ＂strong column weak beam＂,the flange thickness of steel beam influenced the yield moment of joint slightly and influenced its ductility significantly. The effects of concrete strength,steel ratio and stirrup ratio of the end columnto the hysteretic behaviorswere very small and could be ignored.