剖分T型钢梁柱连接框架中柱空间节点抗震试验研究

EXPERIMENTAL STUDY ON THE SEISMIC PERFORMANCE OF THREE-DIMENSIONAL BEAM TO MIDDLE COLUMN CONNECTION WITH T-STUB

为研究空间剖分T型钢半刚性梁柱连接节点的抗震性能,以钢框架中柱节点为研究对象,对2个空间剖分T型钢连接节点模型,2个平面剖分T型钢连接节点模型和1个空间刚性节点模型进行了以柱端为加载模式的空间拟静力试验。通过试验现象分析了不同节点变形特性、塑性发展及破坏模式;由试验数据分析了不同节点的强度、转动刚度、滞回特性、延性系数和耗能特性。研究了空间剖分T型钢连接节点与空间刚性节点和平面剖分T型钢连接节点的受力差异性。研究成果表明:空间半刚性节点在空间荷载作用下与平面半刚性节点在平面荷载作用下具有不同的受力特性。

This paper aims to study the seismic performance of spatial semi-rigid beam-column connections with T-stub. The middle column connection of steel frame is taken as the research object. There are two spatial T-stub connection specimens, two plane T-stub connection specimens and a spatial rigid connection specimen. Spatial quasi-static tests are carried out, in which load is applied to the column. Based on the test obervations, different deformation characteristics, plastic development characteristics and failure modes are analyzed. From the experimental data the rotational stiffness, hysteretic property, ductility coefficient and energy dissipation characteristics of different joints are analyzed. The different mechanical properties between the spatial T-stub joints and plane T-stub joints, as well as spatial rigid joint were studied. It is verified that the mechanical characteristics of spatial semi-rigid joint under spatial load are different from plane semi-rigid joint under plane load.