（河北工业大学土木与交通学院， 天津 300401）

［摘要］为了研究装配整体式钢网格盒式结构体系空腹桁架与柱相交节点的抗震性能，设计制作了5种不同构造参数的钢网格盒式结构空腹桁架与H型钢柱强轴相交节点试件，进行了低周反复荷载试验，分析和研究了节点的破坏过程、承载能力、滞回曲线、骨架曲线、延性和耗能性能等指标。试验结果表明：在桁架与柱连接空腹处设置连续槽形焊缝和加劲板的构造措施可使塑性铰外移，避免了桁架根部焊缝的脆性破坏；对于焊有加劲板的试件，不同加劲板尺寸对试件的抗震性能有一定程度的影响。焊有加劲板试件在应力集中部位易形成裂缝，而利用连续槽形焊缝替代加劲板补强节点则可以缓解试件应力集中；这两种构造形式均由于腹板受压而出现一定程度的腹板局部屈曲现象。为盒式结构节点的实际应用提供了一定的理论支持。

［关键词］空腹桁架与柱相交节点； 盒式结构； 抗震性能

中图分类号：TU391， TU393-3文献标识码：A文章编号：1002-848X(2019)04-0091-07

Experimental study on seismic behavior of intersection joints of vierendeel truss with column in steel grid cassette structure

Kong Dandan, Zhang Xuan, Li Shaofeng, Zhao Xin

（School of Civil Engineering and Transportation， Hebei University of Technology, Tianjin 300401, China)

Abstract:In order to study the seismic performance of intersection joints of vierendeel truss with column in integral assembly steel grid cassette structure, five kinds of steel grid box structure hollow truss and H\|section column strong axis intersection node test piece with different structural parameters were designed and made, and  the low-cyclic reversed loading test was carried out. The damage process, bearing capacity, hysteresis curve, skeleton curve, ductility and energy dissipation performance of the joint were analyzed and studied. The test results show that at the vierendeel of the joint between the truss and column, both adopting continuous groove weld and installing stiffening plate are able to move plastic hinge outward, avoiding the brittle failure of the truss root weld.  For welding specimens with stiffening plates, the  size of the stiffening plate has a certain degree of influence on the seismic performance of the specimens. Welding specimens with stiffening plates are prone to cracks in the stress concentration area, and the use of continuous groove welds instead of stiffening plates can alleviate the stress concentration of the specimens; both of these configurations have a certain degree of local buckling of the web due to compression of the web. The research provides some theoretical support for the practical application of the cassette structural joint.

Keywords:intersection joint of vierendeel truss with column; cassette structure; seismic performance

*河北省自然科学基金资助项目（E2014202173）。

作者简介：孔丹丹，博士，副教授，硕士生导师，Email：1575368772@qq.com。