Abstract The screw connections between cold-formed steel (CFS) profiles and sheathing greatly affect the structural behavior of CFS shear walls. In order to improve shear stiffness and capacity of CFS shear walls, an innovative strengthened screw connection by using additional CFS strips is presented in this paper. For this purpose, a total of 41 strengthened sheathing-screw-CFS profiles connections were tested under monotonic and cyclic loads. The thickness of CFS profiles, panel material, panel thickness, screw diameter and thickness of CFS strips were varied to investigate their impacts on shear performance of the connections. Improvement in shear stiffness and shear strength of the connections can be verified by test results. In addition, the application of this strengthened connection in CFS shear walls was also conducted. One traditional CFS shear wall and two walls with strengthened connections were tested under cyclic horizontal loads. The failure modes, load-displacement responses, deformability, and energy dissipation capacity of the walls were investigated by full-scale tests. Compared with the typical walls, the shear capacity of the strengthened walls can be improved by 1.30–1.53 times, the elastic stiffness is enhanced by 1.63–2.12 times, and the capacity of energy dissipation is also elevated.

中文翻译：

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钢筋连接在CFS剪力墙中的应用及试验研究

摘要 冷弯型钢（CFS）型材与护套之间的螺纹连接极大地影响了CFS剪力墙的结构性能。为了提高 CFS 剪力墙的抗剪刚度和承载力，本文提出了一种通过使用额外的 CFS 条带的创新加强螺纹连接。为此，在单调和循环载荷下测试了总共 41 个加强护套螺钉 CFS 型材连接。CFS 型材的厚度、面板材料、面板厚度、螺钉直径和 CFS 条的厚度是不同的，以研究它们对连接剪切性能的影响。连接的剪切刚度和剪切强度的改进可以通过测试结果进行验证。此外，还进行了这种加强连接在CFS剪力墙中的应用。一个传统的 CFS 剪力墙和两个加强连接的墙在循环水平荷载下进行了测试。通过全尺寸试验研究了墙体的破坏模式、载荷位移响应、变形能力和能量耗散能力。与典型墙体相比，加固后的墙体抗剪承载力可提高1.30～1.53倍，弹性刚度提高1.63～2.12倍，耗能能力也有所提高。