中文摘要：

由于生产工艺要求，大型电厂主厂房不可避免出现型钢混凝土变柱截面异型边节点，为研究其抗震性能，选取3个具有代表性的SRC变柱截面异型边节点和1个柱截面无变化的常规节点进行拟静力试验，研究了SRC异型边节点的破坏形态、滞回特性、承载力、延性、耗能和刚度退化性能．研究结果表明：型钢混凝土异型边节点破坏过程和常规节点类似，破坏形式为“小核心区”剪切破坏；SRC变柱截面异型边节点的承载力、延性、耗能及刚度较常规节点小；梁截面高度的增加能够一定程度提高SRC异型边节点的承载力、延性、耗能及刚度；SRC柱-RC梁异型边节点抗震性能较差；轴压比对异型边节点延性性能影响较大，增加轴压比对试件延性不利．

英文摘要：

Due to the production requirement, there appear inevitably in the main powerhouse of thermal power plant abnormal SRC exterior joints with variable column cross section. To study its seismic behaviors, three representative abnormal exterior joints of variable column cross section and one regular joint of same column cross section are selected and quasi-static tests are carried out to study the failure patterns, hysteretic properties, beating capacity, ductility, energy dissipation and stiffness degradation performance. The results show that destruction process of abnormal SRC exterior joints is similar to the ordinary joints and the failure mode is mainly the shear failure in the minor core area. The bearing capacity, ductility, energy dissipation and stiffness of abnormal joints are relatively smaller than the regular ones. Increasing the height of beam section can improve the bearing capacity, ductility, energy dissipation and stiffness of the abnormal SRC exterior joints to the same extent. Compared with the steel reinforced concrete col- umn-steel reinforced concrete beam joints, the seismic performance of the steel reinforced concrete column-reinforced concrete beam is poor. The axial compression ratio has a great influence on the ductility of abnormal SRC exterior joints, and increasing the axial compression ratio is significantly unfavorable to the ductility.