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鄧華1,2，蔣旭東2，袁行飛1,2，沈金1，董石麟1,2，裘濤1

（1 浙江大學(xué)建筑設(shè)計(jì)研究院， 杭州 310028； 2 浙江大學(xué)空間結(jié)構(gòu)研究中心， 杭州 310058）

 

［摘要］浙江大學(xué)紫金港體育館采用了一種由索-桅桿張力系統(tǒng)吊掛剛性網(wǎng)格結(jié)構(gòu)的新型屋蓋體系，對(duì)其受力特點(diǎn)和設(shè)計(jì)要點(diǎn)作了介紹。利用規(guī)范方法對(duì)屋蓋結(jié)構(gòu)在三種典型工況下的穩(wěn)定性進(jìn)行了分析，進(jìn)一步考察了初始缺陷模式和大小、屋面支撐桿件軸向剛度對(duì)結(jié)構(gòu)極限承載力的影響。結(jié)果表明，該類屋蓋結(jié)構(gòu)在南北向半跨荷載工況下具有較高的極限承載力，但滿跨和東西向半跨荷載工況下較低。三種工況下結(jié)構(gòu)的極限承載能力隨初始幾何缺陷的模式不同變化較小，但是南北向半跨荷載工況下極限承載力對(duì)初始缺陷的大小反應(yīng)敏感。過分提高支撐桿件的剛度反而會(huì)降低屋蓋結(jié)構(gòu)的穩(wěn)定性。

［關(guān)鍵詞］索桿張力結(jié)構(gòu)； 懸掛屋蓋結(jié)構(gòu)； 穩(wěn)定性分析； 初始缺陷； 敏感性分析

中圖分類號(hào)：TU393.3      文獻(xiàn)標(biāo)識(shí)碼：A      文章編號(hào)：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

作者簡(jiǎn)介：鄧華，工學(xué)博士，教授，博士生導(dǎo)師，Email:denghua@zju.edu.cn。

 

［1］包紅澤, 鄧華. 鉸接桿系機(jī)構(gòu)穩(wěn)定性條件分析［J］. 浙江大學(xué)學(xué)報(bào)：工學(xué)版,2006, 40(1):78-84.

［2］袁行飛, 董石麟. 索穹頂結(jié)構(gòu)整體可行預(yù)應(yīng)力概念及其應(yīng)用［J］. 土木工程學(xué)報(bào), 2001, 34(2): 33-37.

［3］JGJ 7—2010空間網(wǎng)格結(jié)構(gòu)技術(shù)規(guī)程［S］. 北京：中國(guó)建筑工業(yè)出版社, 2010.

［4］沈世釗, 陳昕. 網(wǎng)殼結(jié)構(gòu)穩(wěn)定性［M］. 北京：科學(xué)出版社, 1999.