屋面纵向水平支撑对抽柱单层单跨门式刚架钢结构厂房的影响

THE INFLUENCES OF ROOF LONGITUDINAL HORIZONTAL BRACING ON THE COLUMN-REMOVED SINGLE-STORY SINGLE-SPAN PORTAL FRAME FOR STEEL STRUCTURE WORKSHOP

通过对抽柱单层单跨门式刚架钢结构厂房在不同屋面纵向水平支撑布置情况下地震作用计算结果的对比分析,揭示抽柱榀刚架水平地震作用通过屋面纵向水平支撑向其相邻榀进行传递的现象,并指出这种传递现象对与抽柱榀相邻的左右各两榀刚架影响最大,进而给出存在抽柱榀刚架时合理布置屋面纵向水平支撑的建议。同时通过对抽柱榀刚架二维简化模型和三维空间模型计算结果的对比分析,指出在进行抽柱榀刚架二维计算时,应该考虑由于屋面纵向水平支撑的存在而引起的相邻榀刚架对抽柱榀刚架的"帮扶"作用。

Based on comparison and analysis of calculation results of the column- removed single-story single-span steel-structure portal frame for steel structure workshop with different arrangement of the roof longitudinal horizontal bracing under earthquake, this paper revealed the phenomenon when the horizontal seismic force of the column-removed portal frame are transferred to the adjacent portal frame through the roof longitudinal horizontal bracing,and pointed out the effects of the phenomenon on two adjacent portal frames which are around the column-removed portal frame are more significant, and some valuable suggestions to the arrangement of roof longitudinal horizontal bracing were given. Based on the comparison and analysis of calculation results of 2-D simplified model and 3-D model, this paper pointed out the effects of adjacent portal frames on the column-removed portal frame, which should be taken into account during the 2-D seismic calculation of the column-removed portal frame.