（1 天津大学建筑工程学院， 天津 300072； 2 天津大学建筑设计研究院， 天津 300073）

［摘要］以天津理工大学体育馆索穹顶结构为工程背景，对该结构进行了详细介绍及模态计算，对比分析了结构预应力水平、边界条件以及屋盖结构体系三种因素对其自振特性影响，随后又对该结构进行了地震作用下的时程分析计算，并对其变形及内力进行了详细的分析。结果表明，索穹顶结构刚度小，自振频率低，地震作用影响较小。

［关键词］钢结构; 索穹顶； 自振特性； 地震作用； 时程分析

中图分类号：TU359文献标识码：A文章编号：1002-848X(2017)16-0052-07

Self-vibration characteristics analysis and time-history analysis on earthquake action of cable dome structure of gymnasium of Tianjin University of Technology

Wang Xin1, Chen Zhihua1, Yan Xiangyu2, Ma Qing1, Han Fangbing1, Liu Hongbo1

(1 Department of Civil Engineering, Tianjin University, Tianjin 300072, China; 2 Tianjin University Architectural Design and Research Institute, Tianjin 300073, China)

Abstract:Taking the cable dome structure of gymnasium of Tianjin University of Technology as an engineering background, the structure was introduced in detail and the modal calculation of the structure was carried out,  the influences of three factors on the self\|vibration characteristics of prestress level, boundary conditions and roof structure system were compared and analyzed.Then the time-history analysis was conducted on the structure under earthquake action, and the internal force and deformation of the structure were analyzed in detail. The results show that the structural stiffness of cable dome is small, the natural frequency is low, and the effect of earthquake action is small.

Keywords:steel structure; cable dome; self vibration characteristics; earthquake action; time history analysis

*国家自然科学基金资助项目（51478310），天津市建设系统科学技术发展计划（2014-01）。

通讯作者：陈志华，博士，教授，博士生导师，Email:zhchen@tju.edu.cn。