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双肢钢板剪力墙(SPSW-WC)系统由与楼面梁连接的一对钢板剪力墙组成。体现两肢相互作用程度的耦合度和SPSW-WC的塑性强度是了解该系统性能和改进其设计方案的重要参数。采用塑性状态分析和数字模拟方法对单肢和多肢SPSW-WC结构的耦合度和塑性强度进行探讨。研究主要集中于结构的均匀屈服机制,对柔性连接机制也进行了简单的讨论,给出了极限强度和耦合度的解析解。采用不同参数(结构高度或层数、连接长度、耦合梁刚度)设计了32种SPSW-WC结构。采用非线性静态数值分析模型对这些结构进行研究。极限强度和耦合度的数值模拟结果与分析预测结果相一致。研究表明:耦合度对结构重量有着重大影响,特别是高度较大的结构;最大限度提高材料效率的耦合度范围为0.4～0.6。
The twin-limb steel shear wall (SPSW-WC) system consists of a pair of steel shear walls connected to the floor beam. The degree of coupling that reflects the degree of interaction between the limbs and the plastic strength of the SPSW-WC is an important parameter for understanding the system performance and improving its design scheme. The coupling degree and plasticity of single-limbed and multi-limbed SPSW-WC structures were discussed by plastic state analysis and numerical simulation. The research mainly focuses on the uniform yielding mechanism of the structure. The flexible connection mechanism is also briefly discussed. The analytical solutions of the ultimate strength and the coupling degree are given. Thirty-two SPSW-WC structures were designed with different parameters (structural height or number of layers, connection length, and coupling beam stiffness). These structures are studied using nonlinear static numerical analysis models. The results of numerical simulation of ultimate strength and coupling degree are consistent with the results of the analysis and prediction. The results show that the coupling degree has a great influence on the weight of the structure, especially the structure with larger height. The coupling degree of maximally increasing material efficiency is 0.4 ~ 0.6.