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冷弯薄壁型钢小桁架体系是一种新型的轻钢龙骨结构体系,构成承重骨架的基本单元——冷弯薄壁型钢小桁架,由冷弯薄壁方(矩形)钢管通过标准的V型连接件和自钻螺钉连接形成。这种体系的竖向承重构件为冷弯薄壁型钢小桁架墙柱和覆盖在墙柱两侧的墙板构成的组合墙柱体系。考虑墙板对墙柱的蒙皮支撑效应,建立了双侧有相同墙板材料的墙柱体系在轴向荷载作用下的总势能方程,采用里兹法导出了墙柱体系在2种屈曲模式下的轴压弹性屈曲荷载。采用有限元软件对于墙体进行了屈曲分析,得到的屈曲模式和屈曲荷载与计算结果比较吻合。给出的公式可用于双侧有相同墙板材料的墙柱体系的轴压弹性屈曲荷载计算。
Cold-formed thin-walled steel truss system is a new type of light-steel keel structure system, which forms the basic unit of load-bearing skeleton - cold-formed thin-wall steel trusses. The cold-formed thin-walled square steel tube passes through a standard V- And self-drilling screws to form. The vertical load-bearing structure of this system is a combination wall column system composed of a small-wall column of cold-formed thin-wall steel and a wall panel covering both sides of the wall column. Considering the skin support effect of the wall column on the wall column, the total potential energy equation of the wall column system with the same wallboard material on both sides under the axial load was established. The two kinds of buckling modes Axial compression under elastic buckling load. The buckling analysis of the wall was carried out by finite element software, and the buckling mode and buckling load obtained were in good agreement with the calculated ones. The formula given can be used to calculate the buckling load of the axial compression elastic wall column system with the same wallboard material on both sides.