网壳结构考虑杆件失稳过程的整体稳定分析

发布时间：2018-06-30 03:28

本文选题：网壳结构 + 网壳节点缺陷　；参考：《建筑结构学报》2014年06期

【摘要】：通过引入杆件初始缺陷的方法对杆件失稳过程及其对网壳结构整体稳定性能的影响进行分析。首先研究杆件的单元划分数量和缺陷幅值对杆件稳定承载力的影响,提出合理的缺陷幅值。进而计算分析了世博轴阳光谷网壳结构杆件失稳过程中的内力变化及对结构整体稳定性能的影响。结果表明,结构非对称、杆件截面有强弱轴的网壳结构易引起杆件失稳,网壳结构整体稳定分析中可通过对杆件施加初始缺陷有效地考虑杆件失稳对整体稳定性能的影响;对整体失稳之前存在杆件失稳的网壳结构,有必要引入杆件初始缺陷考虑杆件连续失稳的影响。最后提出了网壳结构稳定分析的合理计算流程。
[Abstract]:The instability process and its influence on the overall stability of latticed shell structure are analyzed by introducing the initial defect of the member. Firstly, the influence of the number of elements and the amplitude of defect on the stable bearing capacity of the member is studied, and the reasonable defect amplitude is proposed. Furthermore, the internal force change and its influence on the stability of the whole structure are calculated and analyzed during the instability process of the frame of the solar valley latticed shell structure of the Expo axis. The results show that the lattice shell structure with asymmetric structure and strong or weak axis can easily cause the member instability. In the whole stability analysis of the latticed shell structure, the influence of the member instability on the overall stability performance can be effectively considered by applying the initial defect to the member. It is necessary to introduce the initial defect of the member to consider the influence of continuous member instability on the reticulated shell structure in which the member is unstable before the whole instability. Finally, a reasonable calculation procedure for stability analysis of latticed shell structures is presented.
【作者单位】：浙江大学建筑设计研究院有限公司;浙江大学空间结构研究中心;
【分类号】：TU399

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