（西安建筑科技大学土木工程学院， 西安 710055）

［摘要］宝鸡游泳跳水馆屋盖采用下弦为空间双曲预应力双支拉索新型张弦梁结构。为了探究该结构的变形及受力特点，以1∶5的缩尺模型为试验对象，在下弦双支拉索的两端同时施加预应力，使结构达到预期的初始状态，在此基础上对结构施加多种工况荷载进行静力分析，观测结构的整体变形和杆件的应力响应，并测试结构的极限荷载。试验结果表明，宝鸡游泳跳水馆张弦梁结构具有良好的整体变形能力和受力性能以及较高的安全储备。

［关键词］新型张弦梁结构； 空间双曲预应力双支拉索；  受力性能

中图分类号：TU393.3   文献标识码：A   文章编号：1002-848X(2015)02-0001-06

Experimental study on mechanical performance of newtype beam

string structure of Baoji Swimming and Diving Halls

Hao Jiping， Zhou Yang， Yu Jinguang， Deng Guangrui

 (School of Civil Engineering, Xi′an University of Architecture and Technology, Xi′an 710055, China)

Abstract:The roof of Baoji Swimming and Diving Halls adopts a newtype beam string structure, the bottom chord of which is spatial hyperbolic prestressed double cables. In order to study the mechanical and deformation behaviors of the structure, a 1∶5 scale model was taken as the experimental object. Prestress was exerted on both ends of the double cables in lower chord to make the structure reach the desirable initial state. On this basis, the structural static analysis was carried out under various loading cases. The structural overall deformation and stress responses of structural members were measured, and the ultimate load was tested. The experimental results show that the beam string structure of Baoji Swimming and Diving Halls has good overall deformation capacity, well mechanical performance and high security reserves.

Keywords:newtype beam string structure; spatial hyperbolic pre\|stressed double cables;  mechanical performance

*国家自然科学基金项目（51178381）。

作者简介：郝际平，教授，博士生导师，Email：haojiping@xauat.edu.cn。

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