In recent years, steel plate shear walls (SPSW) have been considered as one of the reliable passive seismic-resisting systems, which are classified into two general categories of stiffened and unstiffened types. Unstiffened SPSWs experience early buckling at low shear loads and hence, the pinching occurs in obtained hysteretic curves and this event significantly reduces the amount of dissipated seismic energy. To address this issue, this paper aims to optimize the performance of unstiffened SPSWs considering different loading conditions and achieve an optimized SPSW with a simple configuration and no need for additional buckling-restrained plates. For this purpose, after validation of the finite element modeling and optimization procedures by ABAQUS, optimized SPSWs were obtained considering the strain energy as the objective function along with the plate volume and planar symmetry as the constraints. Then, all the obtained configurations were superimposed using AutoCAD and a final optimized configuration was proposed. The cyclic performance of unstiffened, ring-shaped and optimized SPSWs with the same weight was evaluated under a quasi-static cyclic loading protocol. Finally, the models of two 5-story building frame systems equipped with unstiffened and optimized SPSWs were subjected to Tabas, Manjil and Bam records to investigate their seismic performance. Based on the obtained results, it was concluded that the performance of the introduced optimized SPSW improved in all cases compared to the ring-shaped SPSW and it can be a reliable alternative to this type of SPSW.

近年来，钢板剪力墙（SPSW）被认为是可靠的被动抗震系统之一，分为加筋型和非加筋型两大类。未加筋的 SPSW 在低剪切载荷下会经历早期屈曲，因此，在获得的滞后曲线中会发生收缩，这一事件显着减少了耗散的地震能量。为了解决这个问题，本文旨在优化考虑不同载荷条件的非加筋 SPSW 的性能，并通过简单的配置实现优化的 SPSW，无需额外的屈曲约束板。为此，在验证了有限元建模和优化程序之后通过ABAQUS，以应变能为目标函数，以板体积和平面对称为约束条件，获得了优化的SPSW。然后，将所有获得的配置使用 AutoCAD 进行叠加，并提出最终的优化配置。在准静态循环加载协议下评估了具有相同重量的未加筋、环形和优化的 SPSW 的循环性能。最后，两个 5 层建筑框架系统的模型配备了未加筋和优化的 SPSW，并接受了 Tabas、Manjil 和 Bam 记录，以研究它们的模型。抗震性能。基于所获得的结果，得出的结论是，与环形 SPSW 相比，引入的优化 SPSW 的性能在所有情况下都有所提高，并且可以成为此类 SPSW 的可靠替代方案。