以佛山世纪莲体育中心为工程背景，通过定性模型试验测试及原型结构有限元分析，系统研究不同构件断裂情况下轮辐式索膜结构动力响应及连续倒塌性能。结果表明，该轮辐式索膜结构主要构件重要性由小到大依次为悬挂索、腹杆、下压环、上压环、墩柱、分叉索、脊索、谷索、内环索；重要构件断裂造成的破坏程度由轻到重依次为一根谷索断裂、一根脊索断裂、两根相邻谷索断裂、两根相邻脊索断裂、墩柱断裂、两根相邻索断裂、三根相邻索断裂、内环索断裂；该结构具有较好的抗连续倒塌能力，重要杆件裂后，能将其承担的荷载迅速传递给相邻构件，较好将坍塌部分限制在有限区域内；通过采用双索体系、分区域设计及多柱式墩可提高结构抗倒塌能力。
Abstract
Based on experimental test of qualitative model and finite element analysis of the archetypal structure of Foshan Century Lotus Stadium, the progressive collapse property and the dynamic response of a wheel-spoke cable-membrane structure were systematically studied when its main members were failure. The results show that the order of the importance of the structure’s main components from small to big is the hanging cables, the truss web, the lower compression ring, the upper compression ring, the column, the divaricating cable, the upper radial cable, the lower radial cable, and the inside cables. The degree of the damage caused by the important members breaking from small to big is the breaking of one lower radial cable, one upper radial cable, two neighboring lower radial cables, two neighboring upper radial cables, column, two neighboring radial cables, three neighboring radial cables, the inside pull cables. The structure has good collapse-resistant property. After the breaking of important members, their loads could be rapidly transferred to the neighboring members. And the collapse range was preferably restricted in limited region. Double cables system, zone-design, and multi-columns style pier could improve the collapse-resistant performance of the structure.
关键词
轮辐式索膜结构 /
连续倒塌 /
动力反应 /
模型试验 /
有限元分析
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Key words
wheel-spoke cable-membrane structure /
progressive collapse /
dynamic response /
model experiment /
finite element analysis
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