Cold-formed steel (CFS) shear walls filled with lightweight polymer material (LPM) is an efficient structural system which can provide high lateral stiffness and strength to resist lateral loads. Despite the significant advantages, the nonlinear behavior of the CFS shear wall filled with LPM is not fully understood. In this study, a total of seven full-scale CFS shear walls filled with LPM were tested under cyclic loads. The test parameters included different LPM types, X-shaped bracing configurations, sheathing types and wall openings. The failure modes hysteresis curves, envelope curves, feature values, ductility ratio, stiffness and energy dissipation of CFS shear wall with and without filling LPM were systematically compared. The experimental data reveled that this type of shear wall showed higher load carrying and energy dissipation capacities than CFS framing wall without LPM. To assist with the design of CFS shear walls filled with LPM, a modified strut-and-tie model was proposed. The modified strut-and-tie model was validated using the experimental data. The result demonstrates that the proposed model can be utilized to accurately estimate the load carrying capacity of CFS shear walls filled with LPM. The presented experimental and analytical results can be used by engineers to design CFS shear walls filled with LPM for earthquake engineering applications.

填充有轻质聚合物材料（LPM）的冷弯型钢（CFS）剪力墙是一种有效的结构系统，可提供较高的侧向刚度和强度以抵抗侧向载荷。尽管具有显着优势，但尚未完全了解填充LPM的CFS剪力墙的非线性行为。在这项研究中，在循环荷载下总共测试了七个充满LPM的全尺寸CFS剪力墙。测试参数包括不同的LPM类型，X形支撑配置，护套类型和壁孔。系统地比较了填充和不填充LPM的CFS剪力墙的破坏模式的滞后曲线，包络曲线，特征值，延性比，刚度和能量耗散。实验数据表明，与没有LPM的CFS框架墙相比，这种剪力墙具有更高的承载能力和耗能能力。为了协助填充LPM的CFS剪力墙的设计，提出了一种改进的撑杆式模型。使用实验数据验证了改进的撑杆和领带模型。结果表明，所提出的模型可用于准确估计填充有LPM的CFS剪力墙的承载能力。工程师可以使用给出的实验和分析结果来设计填充LPM的CFS剪力墙，以用于地震工程应用。使用实验数据验证了改进的撑杆和领带模型。结果表明，所提出的模型可用于准确估计填充有LPM的CFS剪力墙的承载能力。工程师可以使用给出的实验和分析结果来设计填充LPM的CFS剪力墙，以用于地震工程应用。使用实验数据验证了改进的撑杆和领带模型。结果表明，所提出的模型可用于准确估计填充有LPM的CFS剪力墙的承载能力。工程师可以使用给出的实验和分析结果来设计填充LPM的CFS剪力墙，以用于地震工程应用。