【作者】 张家平； 王先铁； 罗遥； 谢川东； 郭艺伟；

【Author】 ZHANG Jiaping;WANG Xiantie;LUO Yao;XIE Chuandong;GUO Yiwei;School of Civil Engineering, Xi’an University of Architecture and Technology;

【机构】 西安建筑科技大学土木工程学院；

【摘要】 采用有限元软件ABAQUS 2017对带楔形装置的自复位方钢管混凝土柱-钢梁节点足尺模型进行数值模拟分析,明确了耗能钢棒直径、预应力筋初始预拉力和预应力筋数量等对节点性能的影响。结果表明:该节点具有良好的抗震性能、自复位性能和可恢复功能;有限元数值分析可较好地模拟该节点的变形、滞回性能、自复位性能和各部件的受力情况;增大耗能钢棒直径可提高节点承载力;增大预应力筋初始预拉力和预应力筋数量,节点承载力显著提高,初始刚度有所增加,但耗能能力有所减小。更多还原

【Abstract】 To investigate the seismic behavior of the post-tensioned(PT) beam-to-column connection using wedge-shaped devices(WSDs) and concrete-filled square steel tubular(CFST) column, finite element models for full-scale connections were developed via ABAQUS 2017, considering the effect of the diameter of the energy-dissipating(ED) bar, the initial PT force and the amount of PT strands. Findings demonstrated that the PT connection using WSDs exhibited favorable seismic behavior, self-centering behavior and resistant ability. The deformation, hysteretic behavior, self-centering ability and the mechanical of the components could be reasonably predicted by the finite element method(FEM). Additionally, increasing the diameter of the ED bar increased the loading capacity of PT connection. Moreover, the increase of the initial PT force and the amount of PT strands can significantly increase the capacity, and slightly increase the initial stiffness, but reduce the energy-dissipating capacity of the connection as well.更多还原