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通过劲性环梁式钢管混凝土节点试件的低周反复荷载试验,研究了节点的受力性能,结果表明:此类节点有效实现了梁铰破坏机制,满足“强柱弱梁、强节点强锚固”的抗震设计要求。运用ABAQUS对节点试件在低周反复荷载作用下的滞回性能进行非线性模拟计算,拓展分析了各部件的应力分布及传递规律,结果表明:节点破坏始于框架梁纵筋屈服,钢管混凝土柱处于弹性阶段,环梁没有产生明显的破坏;塑性铰距离柱边有一定的距离,有效防止梁筋的屈服对节点核心区的影响。
The results of the mechanical performance of the joints show that this type of joint effectively achieves the failure mechanism of the beam joints and meets the requirements of the strong column weak beam and the strong node Strong anchorage "seismic design requirements. Using ABAQUS to simulate the hysteretic behavior of the joint specimens under low cyclic loading, the stress distribution and transfer law of each member are extended and analyzed. The results show that the failure of the joints begins with the longitudinal reinforcement yielding of the frame beam, The column is in the elastic phase, and the ring beam has no obvious damage. The distance between the plastic hinges and the column edge can effectively prevent the yield of the beam from affecting the core area of the node.