（1 中国建筑标准设计研究院有限公司， 北京 100048; 2 西安建筑科技大学土木工程学院， 西安 710055）

［摘要］为研究装配式交错桁架结构上弦与柱连接节点的抗震性能，对4个1∶2缩尺、采用外环板端板形式的装配式交错桁架上弦方钢管混凝土柱节点试件进行了低周往复循环加载试验，对其破坏模式、承载力、刚度、延性、耗能能力以及应变变化规律进行了分析。试验结果表明，外环板-端板形式的装配式交错桁架上弦方钢管混凝土柱节点可能出现竖板剪切破坏、柱压弯破坏和节点板撕裂3种破坏模式；当偏心距较小时，节点的承载力和刚度相对较高；节点竖板厚度越小，其塑性发展越充分，节点的滞回耗能能力越好。

［关键词］装配式交错桁架； 连接节点； 试验研究； 低周往复循环加载； 抗震性能

中图分类号：TU391文献标识码：A文章编号：1002-848X(2018)07-0039-06

Experimental research on seismic behavior of connected joints of top chord of fabricated staggered truss with column

Sun Yanwen1, Qiu Jie2, Lian Ming2, Su Mingzhou2

(1 China Institute of Building Standard Design & Research Co., Ltd., Beijing 100048, China; 2 School of Civil Engineering, Xi′an University of Architecture and Technology, Xi′an 710055, China)

Abstract:In order to study the seismic behavior of connected joints of top chord of fabricated staggered truss with column, low-cycle cyclic loading experiments were conducted on four 1∶2 scaled joint specimens of top chord of fabricated staggered truss (composed of the external ring plate and end plate type) with square tubular steel reinforced concrete column. The joint′s failure mode, bearing capacity, stiffness, ductility and strain response law were studied. Experimental results show that there may be three failure modes such as vertical plate shear failure, column compression bending failure and joint plate tearing failure in the joint specimens of top chord of fabricated staggered truss (composed of the external ring plate and end plate type) with square tubular steel reinforced concrete column. When the eccentricity is small, the bearing capacity and stiffness of the joints are relatively high; the smaller the thickness of the vertical joint plate is, the more fully developed plasticity is and the better the hysteretic energy dissipation capacity is.

Keywords:fabricated staggered truss; connected joint; experimental study; low-cycle cyclic loading; seismic behavior

*国家重点研发计划（2016YFC0701503）。

作者简介：孙艳文，硕士，高级工程师，Email：22979977@qq.com。