（北京工业大学建筑工程学院， 北京 100124）

［摘要］设计了跨度为6m的较为精细的Geiger型索穹顶结构模型，对模型结构进行静力加载试验，研究结构在满跨对称加载及半跨非对称加载两种不同荷载情况下的力学性能，得到了索穹顶结构杆件内力和节点位移的变化规律。试验结果表明，不同荷载工况下，随着荷载的增大，外环索、外斜索的索力及外撑杆轴力逐渐增大，脊索索力逐渐减小或略有减小，增加的荷载主要由外环索、外斜索及外撑杆承担；同一荷载等级下，半跨非对称加载引起的节点竖向位移远大于满跨对称加载引起的竖向位移。

［关键词］索穹顶结构； 静力试验； 力学性能

中图分类号：TU393文献标识码：A文章编号：1002-848X(2018)23-0108-05

Experimental study on static behavior of Geiger-type cable dome structure model

Zhang Weijing, He Jing

(College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China)

Abstract:In order to study the mechanical behavior of Geiger-type cable dome structure under full-span symmetrical load and half-span asymmetrical load, a Geiger-type cable dome structure model with span of 6m was designed and tested in static loading experiment. The variation law of internal forces and joint displacement of the cable dome structure were obtained. The results show that under different load conditions, as the load increases, the cable force of the outer ring cable and the outer inclined cable and axial force of the outer strut gradually increase, while the ridge cable force gradually decreases or slightly decreases. The increased load is mainly borne by the outer ring cable, the outer inclined cable and the outer strut. Under the same load level, the vertical joint displacement caused by half-span asymmetrical load is much larger than that caused by full-span symmetrical load.

Keywords:cable dome structure; static experiment; mechanical property

*国家自然科学基金面上项目（51178009），北京市教委科技计划重点项目(KZ201310005008)。

作者简介：张微敬，博士，教授，Email: zhangweijing@bjut.edu.cn。