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由立柱和导轨通过自钻螺钉相连的冷弯薄壁型钢墙柱骨架是轻钢住宅系统中的竖向承重单元。本文对无支撑、钢带支撑、槽钢支撑和十字交叉钢带支撑的C型截面柱的墙柱骨架进行了在轴心压力作用下的足尺试验。试验结果表明:支撑试件比无支撑试件极限承载力最大提高20%,立柱的破坏模式为弯曲屈曲和弯扭屈曲。通过研究现行设计规范与试验结果的误差,提出了在导轨和支撑约束条件下C型截面立柱的计算长度系数可取为0.8。
The cold-formed, thin-walled steel wall column frame, which is connected to the column and the guide rail by means of self-drilling screws, is a vertical load-bearing unit in the light-steel residential system. In this paper, a full-scale test of the wall column frame of a C-type column with no support, steel belt support, channel steel support and cross-bracing is performed under axial pressure. The test results show that the ultimate bearing capacity of the supporting specimen is 20% higher than that of the unsupported specimen. The failure modes of the pillar are bending buckling and bending-torsional buckling. By studying the error between the current design specification and the test result, it is proposed that the calculated length coefficient of the C-section column can be taken as 0.8 under the guide rail and supporting constraint conditions.