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以三心圆柱面网壳干煤棚工程为例,利用SAP2000建模分析,通过综合考虑结构动静力特点与防屈曲支撑(BRB)特点选择了六种BRB布置方案。对比分析地震作用下几种方案的结构内力及节点位移,得出将防屈曲支撑布置在内力较大的上弦杆处能够有效减小地震作用下结构的杆件最大轴力,将防屈曲支撑布置在受力较大的腹杆处时能够有效减小地震作用下结构的各向节点最大位移。
Taking the triple-cone cylindrical reticulated shell and coal shingle project as an example, by using SAP2000 modeling and analysis, six BRB schemes were selected by comprehensively considering the structural dynamic and static characteristics and the characteristics of buckling brace (BRB). By comparing and analyzing the internal forces of structures and the displacements of joints under several kinds of earthquakes, it is concluded that the arrangement of anti-buckling brace on the upper chord with larger internal force can effectively reduce the maximum axial force of the members under earthquake and the buckling- The maximum displacement of the joints in the structure under the earthquake can be effectively reduced when the web is subjected to a large force.