天津理工大学体育馆索穹顶结构自振特性分析及地震作用时程分析

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

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。

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.