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龙骨式剪力墙作为冷弯薄壁型钢龙骨体系结构的主要抗侧力单元,其抗侧性能是由覆面板、龙骨骨架及其间的自攻螺钉连接的性能决定。建立了基于自攻螺钉连接性能的精细化的冷弯薄壁型钢龙骨式剪力墙的有限元数值模型,并将龙骨与覆面板自攻螺钉连接的恢复力模型引入到剪力墙数值模型中,进行了墙体抗震滞回性能的数值模拟分析。结果表明,计算所得龙骨式剪力墙的弹性刚度、承载力以及变形等特征参数与试验结果吻合较好,该模型能够较为准确地反映龙骨式剪力墙的抗震滞回性能。在此基础上,提出了龙骨式剪力墙数值模拟的简化方法,为房屋整体结构抗震性能的数值分析提供了支撑。
As the main anti-side force unit of the cold-formed thin-wall steel keel system, the keel-shear wall is determined by the performance of the cladding panel, the keel frame and the self-tapping screw connection therebetween. A finite element numerical model of the thin-wall cold-formed steel keel shear wall based on self-tapping screw connection was established and the restoring force model of the connection between keel and self-tapping screw was introduced into the numerical model of shear wall , The numerical simulation analysis of the seismic hysteretic behavior of the wall was carried out. The results show that the calculated elastic stiffness, bearing capacity and deformation of the keel shear wall are in good agreement with the experimental results. The model can accurately reflect the seismic hysteretic behavior of the keel shear wall. On this basis, a simplified method of numerical simulation of the keel shear wall is proposed, which provides a support for the numerical analysis of the seismic performance of the whole building.