冷弯薄壁型钢墙柱骨架的轴压性能试验研究和设计建议  

Experimental research and design suggestion on cold-formed wall-stud structures subject to centric axial loads

作　　者：秦雅菲[1] 张其林[1] 秦中慧[1] 季俊[1] 

机构地区：[1]同济大学建筑工程系,上海200092

出　　处：《建筑结构学报》2006年第3期34-41,共8页Journal of Building Structures

基　　金：山东省建设厅墙改建筑节能科技开发项目资助(2003001)

摘　　要：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。Cold-formed steel wall-stud structures are vertical load bearing units in light-gauge steel houses. These structures are composed of stud and track connected by serf-drilling screws. It has different types of bracing, such as steel belt bracing, channel steel bracing and X-shape steel belt bracing. The full-scale tests are carried out in this research for the wall-stud structures with C-type cross section stud which subject to centric axial loads. The results show that the ultimate load of braced stud is at most 20 percent higher than that of non-bracing stud. The failure modes of the stud are flexural buckling and torsionflexural buckling. The effective length factor of the stud constrained by track and bracing is suggested to be 0.8 by studying the errors between the results of the test and those from design specifications which are currently used.

关 键 词：轻钢住宅 墙柱骨架 足尺试验 破坏模式 计算长度系数 

分 类 号：TU392.1[建筑科学—结构工程] TU317.1