Shear walls of cold-formed steel (CFS) with high aspect ratios could be used in buildings with large openings such as doors and windows. However, the performance of CFS shear walls with high aspect ratios remains unclear due to limited test data. This research aimed to explore the mechanic performance and strength reduction factor of CFS shear walls with high aspect ratios through an experimental study. Five full-scale specimens were tested under monotonic loading, and the failure mechanism, bearing capacity, stiffness, ductility, and energy dissipation of the specimens were obtained. The test results indicated that shear walls with small aspect ratios typically fail as a result of connection damage to horizontal seams and corners, whilst shear walls with high aspect ratios commonly buckle at both the end stud and bottom track. As the aspect ratio increased, the initial stiffness and capacity decreased, while the energy dissipation per unit length increased due to greater flexibility. Ultimately, this study proposes a more reasonable design formula for strength reduction factors based upon a regression analysis of the test data. This will facilitate a more sustainable design approach, and fulfills current standards in engineering practice.

高纵横比的冷弯型钢（CFS）剪力墙可用于具有较大开口的建筑物，例如门窗。但是，由于有限的测试数据，高纵横比的CFS剪力墙的性能仍不清楚。这项研究旨在通过实验研究来探索高纵横比的CFS剪力墙的力学性能和强度降低因子。在单调载荷下测试了五个全尺寸试件，并获得了试件的破坏机理，承载力，刚度，延性和能量耗散。测试结果表明，纵横比小的剪力墙通常会由于水平缝和拐角的连接损坏而失效，而纵横比大的剪力墙通常会在端部立柱和底轨处发生弯曲。随着长宽比的增加，初始刚度和容量减小，而由于更大的柔韧性，每单位长度的能量消耗增加。最终，该研究基于对测试数据的回归分析，为强度折减系数提出了一个更合理的设计公式。这将有助于采用更可持续的设计方法，并满足工程实践中的当前标准。