邓华1,2，蒋旭东2，袁行飞1,2，沈金1，董石麟1,2，裘涛1

（1 浙江大学建筑设计研究院， 杭州 310028； 2 浙江大学空间结构研究中心， 杭州 310058）

 

［摘要］浙江大学紫金港体育馆采用了一种由索-桅杆张力系统吊挂刚性网格结构的新型屋盖体系，对其受力特点和设计要点作了介绍。利用规范方法对屋盖结构在三种典型工况下的稳定性进行了分析，进一步考察了初始缺陷模式和大小、屋面支撑杆件轴向刚度对结构极限承载力的影响。结果表明，该类屋盖结构在南北向半跨荷载工况下具有较高的极限承载力，但满跨和东西向半跨荷载工况下较低。三种工况下结构的极限承载能力随初始几何缺陷的模式不同变化较小，但是南北向半跨荷载工况下极限承载力对初始缺陷的大小反应敏感。过分提高支撑杆件的刚度反而会降低屋盖结构的稳定性。

［关键词］索杆张力结构； 悬挂屋盖结构； 稳定性分析； 初始缺陷； 敏感性分析

中图分类号：TU393.3      文献标识码：A      文章编号：1002-848X(2013)15-0049-04

 

Deng Hua1,2, Jiang Xudong2, Yuan Xingfei1,2, Shen Jin1, Dong Shilin1,2, Qiu Tao1

 (1 Architectural Design and Research Institute of Zhejiang University, Hangzhou 310028, China;2 Space Structures Research Center, Zhejiang University, Hangzhou 310058, China)

 

Abstract: A new roof structure consisting of cable-mast tensile system and its suspended rigid reticulated structure is adopted in Zhejiang University Zijingang Gymnasium. The structural characteristics and design outlines of this roof structure are introduced. Structural stability under three typical load cases is analyzed according to the method suggested in China Code. The critical load-bearing capacities affected by the mode of initial imperfection and its magnitude as well as the axial stiffness of roof bracing members are further investigated. The results indicate that the roof structure maintains higher critical load-bearing capacity in NS half-span load case, but significant decreases occur in full-span and EW half-span load cases. The structural critical loadbearing capacity varies very limitedly with the mode of initial imperfection for all three load cases, however it is sensitive to the magnitude of initial imperfection for NS half-span load case. Over-increasing the stiffness of bracing members may decrease the stability of this roof structure instead.

Keywords: cable-mast tensile structure;suspended roof structure;stability analysis;initial imperfection;sensitivity analysis

作者简介：邓华，工学博士，教授，博士生导师，Email:denghua@zju.edu.cn。

 

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