基于实测索力的预应力空间结构模型修正和稳定性分析  

Model modification and stability analysis of prestressed space structure based on measured cable forces

作　　者：应萧远 金天红 祝自强 蔡孝飞 丁海云 陈缘 王剑锋 閤利娜 沈雁彬[1,2] YING Xiao-yuan;JIN Tian-hong;ZHU Zi-qiang;CAI Xiao-fei;DING Hai-yun;CHEN Yuan;WANG Jian-feng;GE Li-na;SHEN Yan-bin(Space Structures Research Centre,Zhejiang University,Hangzhou 310058,China;Zhejiang Provincial Key Laboratory of Space Structures,Zhejiang University,Hangzhou 310058,China;Zhejiang Province Yijian Construction Co.,Ltd.,Hangzhou 310063,China)

机构地区：[1]浙江大学空间结构研究中心,浙江杭州310058 [2]浙江大学浙江省空间结构重点实验室,浙江杭州310063 [3]浙江省一建建设集团有限公司,浙江杭州310058

出　　处：《空间结构》2023年第2期11-16,共6页Spatial Structures

基　　金：国家自然科学基金项目(51578491);十三五国家重点研发计划(2017YFC0806100)。

摘　　要：预应力空间结构的稳定性分析是结构分析中的一个关键问题,如何准确计算结构的稳定极限承载力是结构设计必须考虑的问题.以杭州黄龙体育中心主体育场屋盖网壳结构为例,首先基于实测索力,利用张力补偿法对有限元模型进行预应力修正;然后在两种荷载工况下,对该结构进行非线性稳定性分析;最后研究整体及不同位置拉索松弛对结构稳定性的影响.研究结果表明:基于实测索力的结构稳定性较理论模型略有降低;拉索整体松弛情况下,结构稳定性下降明显;不同位置索松弛对结构稳定性的影响程度不同,其中内侧索松弛造成的结构稳定性下降最为明显.The stability analysis of prestressed spatial reticulated shell structure is a key problem in structural analysis.Calculating the stability ultimate bearing capacity accurately is nesessary for structural design.In this paper,the main stadium of Hangzhou Huanglong Sports Center is taken as an example.Firstly,based on the measured cable forces,the finite element model is modified by using the improved tension compensation method.Then,the nonlinear stability of the structure is analyzed under two load cases.Finally,the influence of relaxation of all cables and cables at different positions on the stability of the structure is studied.Results show that the stability of the structure based on the measured cable forces is slightly lower than that of the theoretical model.The stability of the structure decreases obviously when all cables are relaxed.The influence of cable relaxation at different positions on the stability of the structure is different,and the decrease of structure stability caused by the outer ring cable relaxation is the most obvious.

关 键 词：预应力空间结构 模型修正 整体稳定性 拉索松弛 

分 类 号：TU394[建筑科学—结构工程]