中文摘要：

为研究T形节点的抗震性能及节点破坏机理,通过对反复荷载下3组（6个）节点试件的试验,研究梁截面尺寸（截面高度）、轴压比和节点配箍率对节点抗震性能的影响,发现T形柱框架节点在低周期反复荷载作用下的裂缝形式与常规矩形节点的X形交叉裂缝不同,其呈反K形。同时利用有限元分析软件ABAQUS对3组节点试件进行弹塑性模拟分析,并验证T形柱框架节点在低周期反复荷载作用下的裂缝呈反K形。针对此类裂缝提出设计建议,对损伤塑性模型中的主要参数影响机理及取值进行简要说明。

英文摘要：

In order to investigate the seismic behavior and the failure mechanism of the T-shaped joints,the experimental study and the nonlinear finite element analysis of 3 sets of joint specimens under cyclic load were carried out. The influence of beam section size（ cross section height）,axial compression ratio and joint stirrup ratio on joint performance was investigated. The crack forms of T-shaped column frame joints under low cyclic loading were different from X type of conventional rectangular joints,which were reverse K type. The finite element analysis software ABAQUS was used to analyse those specimens,and verified that the crack of T-shaped column frame joints under low cyclic loading was reverse K type. Design suggestions were put forward for this kind of crack simultaneously. Meanwhile,the impact mechanism and the value of the main parameters for damage plasticity model were briefly described.