（1 扬州市人民政府抗震人防办公室， 扬州 225009； 2 扬州大学建筑科学与工程学院， 扬州 225127）

［摘要］为研究托换后宽柱双梁节点的抗震性能，设计制作了6个1∶2缩尺的宽柱双梁节点，并进行了拟静力循环加载试验，研究了轴压比、纵梁对宽柱双梁节点的承载能力、刚度、耗能及延性等性能的影响。结果表明：混凝土与钢筋之间存在一定的粘结滑移，但节点总体抗震性能良好；轴压比的增大在一定程度上提高了试件的极限承载能力，增大柱顶轴压力提高了节点核心区的抗剪承载力，但节点的延性出现了显著的下降；通过平面宽柱双梁节点与空间宽柱双梁节点对比，平面宽柱双梁节点的极限承载力更优。

［关键词］宽柱双梁节点； 轴压比； 承载能力； 抗震性能； 延性

中图分类号：TU375-4文献标识码：A文章编号：1002-848X(2021)01-0072-07

Experimental study on seismic performance of wide-column double-beam joints

XU Hong1, MENG Ruizhi2, CAO Dafu2, GE Wenjie2, BAO Jun2

(1 Anti Earthquake Civil Air Defense Office of Yangzhou Municipal People′s Government, Yangzhou 225009, China；2 College of Civil Science and Engineering, Yangzhou University, Yangzhou 225127, China)

Abstract:In order to study the seismic performance of wide-column double-beam joints after underpinning, six wide-column double-beam joints with a scale of 1∶2 were designed and made. The pseudo-static cyclic loading test was carried out to study the effects of axial compression ratio and the longitudinal beam to the wide-column double-beam joints′ performance such as bearing capacity, stiffness, energy dissipation and ductility of the joints. The results show that bond slip between concrete and steel bar occurred, but the seismic performance of the joints are good; with the increase of axial compression ratio, the ultimate bearing capacity of the specimens is improved to a certain extent.And increases the axial pressure of the column top,the shear-bearing capacity of the core area of the joints is improved, but the ductility of the joints has decreased significantly; according to comparison of the plane and spatial wide-column double-beam joints, the plane wide-column double-beam joints has higher ultimate bearing capacity.

Keywords:wide-column double-beam joint; axial compression ratio; bearing capacity; seismic performance; ductility