Abstarct: Characteristics of steel shear wall including bearing capacity and high hardness along with plasticity and better energy absorbance compared with other seismic systems have made steel shear wall an effective seismic system. In addition, it can lead to cost reduction and shorten construction time. Steel shear walls are generally used as non-hardened (flat) and hardened walls. Using numerous hardeners has led to the improvement of structural hardness and more energy absorption but its construction needs more time and cost. Using corrugated sheets causes this system to be a flat and hardened steel shear wall due to its special form and high out-plane hardness which mitigates some disadvantages of hardened steel shear walls. Although corrugated shear wall has significantly increased structure hardness, they have performed weakly in terms of seismic behavior stability, final resistance, and energy absorption compared with non-hardened steel shear wall. A type of reinforced steel shear wall is suggested by the author in this study to improve the performance of this system. In this thesis, the behavior and performance of steel shear wall is studied in hardened, horizontal corrugated, vertical corrugated, reinforced with horizontal corrugated sheet, and reinforced with vertical corrugated sheet modes. Samples are modeled for three-storey and one-opening frxame and in full scale and are under gravity and seismic loading. Samples are assessed for opening length to floor height ratio of three modes of L/h=0.5، L/h=1 and L/h=1.5 and for three thicknesses of 1.5, 3, and 4.5. All elements and different parts of steel shear wall are separately and completely designed and then controlled for each above-mentioned modes (9 modes in total) baxsed on valid international regulations as steel shear wall is important as a plastic system and it is necessary to create a plastic deterioration and prevent rigid breakage in the structure. Findings of this study show that reinforced shear wall has shown a stable and suitable behavior during loading and is able to improve the disadvantages of non-hardened and corrugated walls in terms of seismic performance. Also, results showed that it is reasonable to use horizontal corrugated sheets in corrugated and reinforced steel shear walls for L/h less than 1 and vertical corrugated sheets have better results for L/h larger than 1.