（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］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的静力性能进行了试验研究，包括节点的破坏模式、承载力、刚度、延性和应变反应。试验结果表明，水平单调荷载作用下，节点的竖板、节点板、外环板和柱壁相继屈服进入塑性；各节点试件在破坏前，其承载力均未出现下降，说明该上弦节点具有良好的承载力和安全储备；节点的外环板厚度越大，其弹性刚度越大，且承载力越高；节点偏心距越大，其延性系越好。

［关键词］装配式交错桁架； 连接节点； 静力性能； 试验研究； 破坏模式

中图分类号：TU398-7文献标识码：A文章编号：1002-848X(2018)07-0033-06

Experimental study on static performance of connected joints of top chord of fabricated staggered truss with column

Sun Yanwen1, Hu Lingsong2, 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:The experimental study was conducted on the static performance of 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 failure mode, bearing capacity, stiffness, ductility and strain response of joints were studied. Experimental results show that under the effect of horizontal monotonous loads, vertical plate, joint plate, external ring plate and the column wall of the joints yield into plasticity successively; the bearing capacity of each joint specimen is not decreased before failure, showing that the top chord joint has good bearing capacity and safety reserve; the greater the thickness of the external ring plate of the joint is, the greater the elastic stiffness is and the higher the bearing capacity is; the greater the eccentricity of the joint is, the better the ductility of the joint is.

Keywords:fabricated staggered truss; connected joint; static performance; experimental study; failure mode

*国家重点研发计划（2016YFC0701503）。

作者简介：孙艳文，硕士，高级工程师，一级注册结构工程师，Email：22979977@qq.com。