冷弯型钢组合墙体抗剪承载力简化计算方法研究

Research on the simplified method for calculating shear resistance of cold-formed steel composite wall

对组合墙体抵抗水平剪力的受力机理进行了分析研究,在借鉴传统木结构房屋组合墙体抗剪承载力设计方法的基础上,分别用整体分析方法和剪力流分析方法对组合墙体上自攻螺钉受力进行分析,推导了单个自攻螺钉抗剪承载力与组合墙体抗剪承载力之间的关系,提出了冷弯型钢组合墙体的抗剪承载力计算公式及建议.并将本文公式计算结果与试验结果进行比较分析.结果表明:两种简化分析方法的计算结果均小于由组合墙体抗剪试验结果反算得到的抗剪承载力设计值,简化公式计算结果偏于安全,且剪力流分析方法较整体分析方法更为简便.本文提出的冷弯型钢组合墙体抗剪承载力计算公式,计算结果安全合理,计算过程简单实用,可供实际工程设计参考.

The capacity of shear behavior of composite wall to resist horizontal load is analyzed in this paper. The design suggestions and formulas for calculating shear resistance of such composite wall are proposed for timber structure composite wall. Based on the analysis of shear behavior of self-tapping screws on the composite wall, the relationship between single self-tapping screw＇ shear resistance and composite waifs shear resistance is set up by two methods ： the global analysis method and the simplified method. The results are compared. Comparison shows that the results calculated by those two methods are lower than that of the test,and the simplified method is simpler than the global analysis one. The formulas for determining the shear load-carrying capacity of composite wall in this paper are safe and simple to use, as reference for engineering design.