中文摘要：

当采用T形钢和高强螺栓连接的梁柱节点时,不同的连接件构造对节点受力性能的影响很复杂。为了研究不同连接件构造对T形钢连接节点受力性能的影响,在实验研究的基础上,用有限元软件ABAQUS建立不同构造节点的非线性有限元模型进行分析。模型综合考虑了材料的循环塑性特征、连接部位的接触问题以及高强螺栓的预紧力等要素。通过数值模拟分析,对包含不同构造连接件的T形钢连接节点在循环荷载作用下的受力性能进行了深入探讨。研究结果表明：对节点连接件进行局部加强可以显著提高节点承载力,但对增加其延性和耗能能力并无帮助;对节点连接件进行局部削弱有助于增加节点的变形能力和耗能系数。但其承载能力退化严重;翼缘扩大型T形钢连接节点的延性系数和耗能系数均是普通T形钢连接节点的1.3倍,其承载能力较普通T形钢节点提升了43.3%,是更优良的T形钢连接节点构造形式。

英文摘要：

Connections using T-stub and high strength bolt to join beam and column have good mechanical performance. The structural behaviors of the connections are strongly affected by the forms of joints. In order to study the influence of different T-stub structures on the mechanical performance of the connections,nonlinear finite element models were built by ABAQUS based on an experimental research. Through the numerical simulation analysis,the cyclic plastic characteristics of material,the contact of connection parts and the pre-tightening force of high strength bolts were considered in the models. The mechanical performances of connections with different forms of T-stub structures under cyclic loading were discussed. The simulation results prove that the enhanced connections improve carrying capacity but weaken ductility and energy dissipation performance. The weakened connections improve the deformation capacity and the energy dissipation performance but decline thecarrying capacity. The ductility coefficient and energy dissipation coefficient of the widened T-stub connections are 1. 3 times as large as those of the ordinary one,and the carrying capacity is increased by 43. 3%,which shows that the widened T-stub connections have better structural behavior than others.