(1 江苏科技大学土木工程与建筑学院， 镇江 212003； 2 上海建筑设计研究院有限公司， 上海  200041; 3 嘉兴职业技术学院， 嘉兴 314036）

［摘要］为研究不同索撑节点对张弦梁受力性能的影响，设计了连续式索撑节点和间断连续式索撑节点两榀模型。通过对两榀模型在预应力、跨中集中荷载及不对称集中荷载三种工况下进行静力试验，从索力损失、拉索伸长量等方面进行分析。结果表明：两种模型的索力损失相比于索力为小量，且索力均随着外部荷载的增加而线性增加，两种模型的索力大小差不多；跨中集中荷载作用下，间断连续式索撑节点张弦梁两侧的索力差几乎不变，而连续式索撑节点张弦梁两侧的索力差随外荷载增加而增大；不对称集中荷载作用下，连续式索撑节点张弦梁两侧的索力差几乎不变，而间断连续式索撑节点张弦梁两侧的索力差随荷载增加而增大。

［关键词］预应力钢结构； 张弦梁； 索撑连接； 试验

中图分类号：TU394文献标识码：A文章编号：1002-848X(2017)12-0053-05

Static load test study on beam string structures with two different cable-strut joints

Li Yaming1,2, Yang Siqi1，3, Tang Baijian1, Wang Fei1

(1 School of  Architecture and Civil Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China; 2 Shanghai Architectural Design & Research Institute Co.，  Ltd.，  Shanghai 200041, China; 3 Jiaxing Vocational  Technical College, Jiaxing 314036, China)

Abstract:To study the effect of different cable-strut joint types on the mechanical behavior of a beam string structure, two beam string structure specimens, one with the continuous cable-strut joint and the other with the intermittent continuous cable-strut joint, were designed for comparison. The static tests were carried out under three kinds of working conditions, namely, the prestressed loads, the concentrated loads in the mid span and the asymmetrical concentrated loads, and the cable force loss and the cable elongation were analyzed in two cases. The results show that the cable force loss of two models compared to the cable force is small, and the cable force has the linear increase with the increase of external load and cable forces of two models are similar in size. Under the mid\|span concentrated loads, cable force loss of beam string with intermittent cable-strut joint is almost the same, and cable force loss of beam string with continuous cable-strut joint increases with the increase of external load. Under the  asymmetric concentrated loads, cable force loss of beam string with continuous cable-strut joint is almost unchanged, while cable force loss of beam string with intermittent cable-strut joint increases with the increase of loads.

Keywords:prestressed steel structure; beam string structure; cable-strut joint; test

*江苏省结构工程重点实验室项目（ZD1302）,住建部科技计划项目（2016-K5-049）。

通讯作者：王飞，博士，副教授，Email：1265496405@qq.com。