Light-gauge steel framed (LSF) wall systems of low- and mid-rise buildings are made of cold-formed steel studs and tracks and lined with sheathing material such as gypsum plasterboard. The stiffness provided by sheathing can be idealised into three main components, namely, in-plane, out-of-plane and rotational stiffness. Idealised in-plane stiffness has been used commonly in the numerical and analytical studies of cold-formed steel stud walls. Experimental evidence shows that local in-plane response depends on several factors such as stud thickness, thickness of sheathing material, screw fastener diameter, fastener end and edge distances, number of layers of sheathing material and environmental conditions, of which the effects of most of them are not well understood. An experimental study was therefore conducted to investigate the non-linear local in-plane strength and stiffness of screw-fastened stud-to-gypsum plasterboard sheathing connections by varying a range of parameters affecting their stiffness and capacities. The resulting load-displacement curves were analysed, and models of characteristic curves were developed. A finite element model and an analytical model were then developed to determine the local in-plane response and initial stiffness of stud-to-sheathing screw fastener connections, by employing pure bearing response of sheathing, and were validated using experimental results.

低层和中层建筑的轻型钢框架（LSF）墙系统由冷弯的钢钉和轨道制成，并衬有诸如石膏石膏板的护套材料。护套提供的刚度可以理想化为三个主要分量，即面内，面外和旋转刚度。理想的平面内刚度通常用于冷弯型钢立柱墙的数值和分析研究中。实验证据表明，局部平面内响应取决于多个因素，例如螺柱厚度，护套材料的厚度，螺钉紧固件的直径，紧固件的端部和边缘距离，护套材料的层数以及环境条件，其中大多数他们还不太了解。因此，进行了一项实验研究，以通过改变影响其刚度和承载力的参数范围来研究螺钉紧固的螺柱到石膏石膏板护套连接的非线性局部面内强度和刚度。分析所得的载荷-位移曲线，并建立特性曲线模型。然后，开发了一个有限元模型和一个解析模型，以通过采用纯护套的轴承响应来确定螺柱至护套螺钉紧固件连接的局部平面响应和初始刚度，并使用实验结果对其进行了验证。分析所得的载荷-位移曲线，并建立特性曲线模型。然后，开发了一个有限元模型和一个解析模型，以通过采用纯护套的轴承响应来确定螺柱至护套螺钉紧固件连接的局部平面响应和初始刚度，并使用实验结果对其进行了验证。分析所得的载荷-位移曲线，并建立特性曲线模型。然后，开发了一个有限元模型和一个解析模型，以通过采用纯护套的轴承响应来确定螺柱至护套螺钉紧固件连接的局部平面响应和初始刚度，并使用实验结果对其进行了验证。