Abstract

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

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.