狗骨式钢梁侧向支撑合理位置分析

DISCUSSION ON REASONABLE POSITION OF LATERAL BRACE FOR REDUCED BEAM SECTION CONNECTION

借助有限元分析软件,采用两种侧向支撑的设置方案对狗骨式钢梁进行非线性屈曲分析。探讨侧向支撑间距对狗骨式钢梁稳定承载力的影响,以及狗骨式钢梁翼缘削弱处侧向支撑的影响。结果表明:侧向支撑并非越多越好,应合理控制其间距。按现行规范设置狗骨式钢梁的侧向支撑能够满足结构承载力要求,而不必非在翼缘削弱处设置侧向支撑。

It is conducted the nonlinear buckling analysis of reduced beam section connection using two procedures of setting lateral braces and the finite element analysis software. The influence from the lateral brace space to the critical load of reduced beam section connection is discussed here. The influence from the lateral braces at the reduced flange is particularly noticed. The results show that it is really not more lateral braces are the best; the space of the lateral brace should be reasonably controlled. The demand of bearing capacity for the structure can be satisfied as setting the lateral brace of reduced beam section connection according to the current code for design of steel structures, however there is not necessarity to set lateral braces in the reduced flange.