摘要
该文详细研讨了一种新颖的蜂窝三撑杆型索穹顶,索穹顶结构的上弦索平面投影为蜂窝状网格,与下弦节点相连的有三根撑杆。不采用上下弦只有一根垂直水平面撑杆的"拉索海洋和压杆孤岛"传统张拉整体Fuller构想。这种新型蜂窝三撑杆型索穹顶的提出,即减少了环索与斜索用量,又提高了撑杆及结构的整体稳定性。该文对索穹顶预应力态采用节点平衡方程,详细推导和建立了蜂窝三撑杆型索穹顶索杆内力的一般性计算公式,对若干参数的索穹顶给出了索杆预应力的计算用表和大量的算例分析,以诠释索穹顶预应力态的分布规律和受力特性。该文的研究为索穹顶结构的选型和设计提供了一种新方案、新形体。
A novel type of three-strut honeycomb-type cable dome, with upper chords forming a honeycomb-shaped grid structure and three struts converging at the lower chord node, was studied. The Fuller’s structural principle of isolated struts in compression inside a net of tensile cables with one vertical strut between upper and lower chord nodes was not adopted. The new type of three-strut honeycomb-type cable dome had fewer hoops and oblique cables, and also had better stability for struts and the overall structure. The general calculation formulas were presented to determine the pre-stressing force distribution of honeycomb-type cable dome based on the equilibrium equation of each nodal point. The calculation table and many examples of cable dome structures under different parameters were given to fully understand the pre-stressing distribution and the mechanical behavior of honeycomb-type cable dome. This study provides new forms and ideas for the design of cable domes.
作者
董石麟
陈伟刚
涂源
郑晓清
DONG Shi-lin;CHEN Wei-gang;TU Yuan;ZHEN Xiao-qing(Space Structures Research Center, Zhejiang University, Hangzhou, Zhejiang 310027, China;Zhejiang Southeast Space Frame Co., Ltd, Hangzhou, Zhejiang 311200, China;The Architectural Design & Research Institute of Zhejiang University Co., Ltd, Hangzhou, Zhejiang 310028, China)
出处
《工程力学》
EI
CSCD
北大核心
2019年第9期128-135,共8页
Engineering Mechanics
基金
国家自然科学基金项目(51478420)
关键词
蜂窝三撑杆型索穹顶
结构构形
预应力态
分析方法
受力特性
计算用表
honeycomb-type cable dome with three struts
structural configuration
prestressing force distribution
analysis method
mechanical behavior
calculation table
