Steel plate shear wall (SPSW) has been widely used as a lateral force resisting system (LFRS) for medium or high‐rise buildings. The fundamental period is an important parameter for seismic design and seismic risk assessment of building structures. In this paper, a simplified method is developed for the period prediction of SPSW structures based on the basic theory of engineering mechanics. It estimates a SPSW structure as a shear system of steel frame and a shear‐flexure system of SPSWs separately. The fundamental period of the SPSW structure is calculated according to the integration of the lateral stiffness of the steel frame and SPSWs along the height. A corrected formula is proposed based on the fitting analysis of the ratio of the FEM period to the estimated period. A shaking table test is used to validate the corrected formula, the relative error between the corrected result and the test result is 5.0%. Besides, the proposed method is also compared to some existing methods for the period prediction of SPSW structures, the results indicate that the proposed method has good accuracy and can be hand‐calculated. Finally, a probability‐based method is proposed for the corrected formula, and the fundamental period could be determined with a certain guarantee. A confidence interval estimation could be determined via the proposed method according to the demand of structural design.

中文翻译：

---

钢板剪力墙钢框架基本周期的简化预测方法

钢板剪力墙（SPSW）已被广泛用作中型或高层建筑的横向抗力系统（LFRS）。基期是建筑结构抗震设计和地震风险评估的重要参数。本文基于工程力学的基本理论，提出了一种简化的SPSW结构周期预测方法。它将SPSW结构估计为钢框架的剪切系统和SPSW的剪切挠曲系统。SPSW结构的基本周期是根据钢框架和SPSW沿高度的横向刚度的积分计算的。在对有限元周期与估计周期之比进行拟合分析的基础上，提出了修正公式。使用振动台测试来验证校正后的公式，校正结果与测试结果之间的相对误差为5.0％。此外，将该方法与现有的SPSW结构的周期预测方法进行了比较，结果表明该方法具有较好的精度，可以手工计算。最后，针对修正后的公式提出了一种基于概率的方法，并且可以在一定的保证下确定基本周期。可以根据结构设计的需要，通过所提出的方法来确定置信区间估计。为校正后的公式提出了一种基于概率的方法，并且可以有一定保证地确定基本周期。可以根据结构设计的需要，通过所提出的方法来确定置信区间估计。为校正后的公式提出了一种基于概率的方法，并且可以有一定保证地确定基本周期。可以根据结构设计的需要，通过所提出的方法来确定置信区间估计。