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为推广胶合板在低层轻钢龙骨房屋体系中的应用,本文利用有限元软件分析了胶合板覆面轻钢龙骨式组合墙体的抗剪性能。在建立有限元模型时,龙骨和面板分别选用三维梁单元和平面应力单元模拟,并考虑到材料非线性和几何非线性的影响,采用耦合双弹簧模型模拟自攻螺钉连接。基于胶合板-轻钢龙骨自攻螺钉连接性能,分析组合墙体在水平荷载作用下的抗剪承载力。通过对比分析,讨论胶合板厚度、自攻螺钉直径以及墙面板周边自攻螺钉间距对组合墙体抗剪性能的影响。分析结果表明:随着胶合板厚度增加、自攻螺钉直径加大、墙面板周边自攻螺钉间距加密,组合墙体的抗剪承载力明显增加。
In order to promote the application of plywood in the low-rise light steel keel housing system, this paper analyzes the shear resistance of plywood clad with light steel keel composite wall using finite element software. In the process of establishing the finite element model, the three-dimensional beam element and the plane stress element are used respectively for the keel and the panel. Considering the influence of material nonlinearity and geometric nonlinearity, the coupled double spring model is used to simulate the self-tapping screw connection. Based on the self-tapping screw connection performance of plywood-light steel keel, the shear capacity of composite wall under horizontal load was analyzed. Through comparative analysis, the influence of plywood thickness, self-tapping screw diameter and the distance between self-tapping screws around wall panel on the shear resistance of composite wall are discussed. The analysis results show that with the increase of plywood thickness, the self-tapping screw diameter increases and the self-tapping screw spacing around the wall panel is encrypted, and the shearing bearing capacity of the composite wall body increases obviously.