群柱失稳研究进展

发布时间：2018-09-04 17:15

【摘要】：首先对群柱平面内稳定性进行论述,通过算例分析简单阐述了同层框架柱以及层间框架柱的相互作用机理,并对各国学者在此方面的研究工作进行了总结;然后着重讨论了通高区结构群柱面外稳定问题,包括平面框架(矩形通高区)和曲面框架,其中对平面框架的群柱面外稳定设计方法的研究相对成熟,而对于面外支撑效果更强的曲面框架,通过算例分析了其失稳机理;最后对在高层筒中筒结构和塔结构中大量使用的网格式筒壳结构的群柱稳定问题进行了探讨。结果表明:网格式筒壳结构不同于平面框架,其在失稳时表现出明显的空间变形特性,使得网格式筒壳结构群柱面外稳定设计理论的研究变得非常复杂;各国研究成果较少,严重滞后于工程应用,亟待进一步解决。
[Abstract]:Firstly, the in-plane stability of the cluster columns is discussed, and the interaction mechanism of the same layer frame column and the interstory frame column is briefly expounded through the example analysis, and the research work of the scholars in various countries in this respect is summarized. Then, the problem of outer-cylindrical stability of structure group in high zone is discussed emphatically, including plane frame (rectangular high zone) and curved frame, in which the design method of out-of-cylindrical stability of plane frame is relatively mature. The instability mechanism of the curved frame is analyzed by an example, and the problem of the group column stability of the reticulated cylindrical shell structure which is widely used in the tall tube and tower structure is discussed in the end. The results show that the lattice cylindrical shell structure is different from the plane frame structure, and it shows obvious spatial deformation characteristics when it is unstable, which makes the research on the design theory of the cylindrical stability of the cylindrical shell group very complicated, and the research results in many countries are less. It lags behind the engineering application and needs to be solved further.
【作者单位】：清华大学土木工程系;西安交通大学人居环境与建筑工程学院;
【基金】：清华大学自主科研项目(2012Z10134)
【分类号】：TU391;TU311.2

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