Abstarct: In this study, the behavior of a reinforced steel corrugated shear wall system with two plain steel sheets and a reinforced steel shear wall with two corrugated steel sheets is investigated under cyclic loading. This thesis consists of two main sections: The experimental program, finite element analysis, and validation. In the laboratory study section, four specimens of a one-story, one-bay steel frxame with a steel shear wall at a scale of 1:3 were tested. The first specimen, "SPSW," had a slender unhardened web plate, the second specimen, "CSPSW," had a slender unhardened web plate with vertical corrugations at a 45° angle as control specimens. The proposed third specimen, "SCSSPSW," had a vertically corrugated web plate reinforced with two plain sheets, and the fourth innovative specimen, "CSCSPSW," had a plain web plate reinforced with two vertically corrugated sheets at a 45° angle. All VBEs and HBEs sections of the specimens were made of I-shaped profiles. The specimens were cyclically loaded using hydraulic jacks, and the behavior of the specimens was recorded during the loading process using strain gauges and displacement sensors. The experimental results showed the elastic stiffness for specimen CSCSPSW, compared to those of specimens SPSW, CSPSW, and SCSSPSW, increased by around 46, 10, and 131%, respectively. In contrast, the mean values of the effective stiffness for the CSCSPSW specimen increased by about 20, 6, and 56%, respectively, compared to specimens SPSW, CSPSW, and SCSSPSW. Additionally, the maximum lateral load capacity of specimen CSCSPSW increased by nearly 17, 37, and 19%, respectively, compared to those of SPSW, CSPSW, and SCSSPSW specimens. The mean values of the yield strength specimen CSCSPSW were equal to that of SPSW and were about 22% and 12% more than those of CSPSW and SCSSPSW, respectively. the ductility coefficient of specimen CSCSPSW increased by around 12, 50, and 82% compared to SPSW, CSPSW, and SCSSPSW specimens, respectively. So that the proposed steel shear wall consisting of a plain web plate reinforced with two vertically corrugated plate can exhibit stable and suitable behavior during loading and effectively improve the performance deficiencies of unhardened and corrugated steel shear walls with the same materials. In the analytical section, four laboratory specimens of steel shear walls with vertically corrugated web plates and three models with horizontally corrugated web plates at a 45° angle were modeled and validated using Abaqus software. After modeling the specimens, the effect of initial deformation of the flange plates and mesh size on the results was analyzed numerically, and the obtained stiffness and strength values were compared with the experimental results, demonstrating the accuracy of the finite element model. Furthermore, in the analytical models, stress concentration zones similar to those observed in the laboratory models were obtained. In addition to modeling and analyzing the laboratory specimens, the behavior of a frxame without web plates was investigated to determine the effect of the web plate on the system's capacity. From the analytical results, it was observed that on average, the CSPW-V specimen had 5% higher initial stiffness, effective stiffness, maximum shear strength, and yield strength compared to the CSPW-H specimen. Therefore, the steel shear wall with a vertically corrugated web plate at a 45° angle is more suitable than the steel shear wall with a horizontally corrugated web plate at a 45° angle.