群柱失稳研究进展-《建筑科学与工程学报》

文章信息/Info

Author(s):: ZHANG You-hao, GUO Yan-lin, ZHU Bo-li; Department of Civil Engineering, Tsinghua University

Keywords:: in-plane multi-column stability; out-of-plane multi-column stability; frame column; grid shell; instability mechanism

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:: The in-plane stability of frame considering the interaction among the multi-columns was discussed. The mechanism of interaction among the frame columns in the same story or in above and below stories was simply clarified by some examples, and the research work conducted by previous scholars was summarized. Then, the out-of-plane buckling behavior considering the interaction of multi-columns in the frames of none-floor region was mainly discussed, including the planar frame (rectangular non-floor region) and the curved frame. The out-of-plane multi-column instability of planar frames was solved already, but the research on curved frames which received stronger lateral supports provided by the curved beams was analyzed by example. Finally, the multi-column buckling behavior of the grid shell structures, which were widely used in the tubeintube structures and the tower structures of highrise buildings, was investigated. The results show that compared with the planar frames, the grid shell structures subjected to axial loads tends to buckle in extremely complex spatial modes. It makes the corresponding design method lag behind engineering application, which needs to be solved urgently.