摘要
为了提高索穹顶结构的抗灾害性荷载能力,本文基于荷载缓和体系的思想,提出了一种缓和装置,并将荷载缓和刚度单元应用于肋环型索穹顶结构中。以一个跨度为50 m的肋环型索穹顶结构为例,将缓和装置设置在外两圈脊索、斜索及外三圈环索共7个方案,采用有限元法分析了布置方案及荷载缓和刚度K对缓和效果影响。算例表明,在外圈环索和外圈斜索布置缓和装置时内力有较大减少。而结构的荷载缓和效果以及最大挠度都随着荷载缓和装置弹簧刚度系数K的增大而减小。
In order to improve the capability of resistance to disaster load of the cable dome structure,based on load relieving system, a new load relieving device was proposed. Taking a 50 meter Geiger domes structure,load relieving structure was investigated,7 device arrangements are discussed. The influence of load relieving device arrangements and the generalized spring stiffness constant K are analyzed. The calculated results indicated that the out of ring cable and diagonal cable can be relieved the internal force of the structure. The load relieving effect and deflection reduced with the spring stiffness constant K increased.
出处
《科技通报》
北大核心
2009年第6期826-830,共5页
Bulletin of Science and Technology
基金
国家自然科学基金资助项目(50478079)
关键词
肋环型索穹顶
荷载缓和
缓和装置布置
特性分析
Geiger domes structure
load relieving
relieving device arrangements
behaviors analysis
