Amirkabir University of Technology Amirkabir Journal of Civil Engineering 2588-297X 55 7 2023 09 23 Study of seismic behavior of the steel plate shear walls with vertical and inclined stiffener Study of seismic behavior of the steel plate shear walls with vertical and inclined stiffener 1379 1398 5161 10.22060/ceej.2023.21557.7761 FA Farid Taleshi Milani Master of science graduate of structural engineering of University of Tabriz Masoud Hoseinzadeh Asl Assistant professor of structural engineering, University of Tabriz 0000-0002-5967-6211 Journal Article 2022 07 07 Steel shear wall is one of the most common systems which are suitable to provide strength and stability against seismic lateral loads. In this system, vertical boundary elements around the shear wall, in addition to being part of the lateral load-resisting system, are responsible for bearing the weight of the structure during and after the earthquake. Therefore, in designing this system the boundary elements are desired to remain elastic after the complete yield of the web plate. Also, to provide uniform stress along the length and height of the wall, vertical and horizontal boundary elements must have high flexural stiffness. To reach this goal, the code provisions sometimes lead to the selection of non-economic sections for the beams and columns attached to the wall. In this study, To reduce the demand for vertical boundary elements attached to the wall and to make the design economical, vertical and inclined stiffeners are predicted inside the wall. These stiffeners redirect the plastic deformations mainly into the wall and away from the columns. To evaluate and compare the behavior of the proposed model, 30 finite element models were studied under lateral monotonic and cyclic loading. The results show that the addition of stiffeners, in addition to increasing the stiffness and lateral resistance of the system, increases the ductility of the lateral load resisting system and reduces the required flexural stiffness of horizontal boundary elements. Steel shear wall is one of the most common systems which are suitable to provide strength and stability against seismic lateral loads. In this system, vertical boundary elements around the shear wall, in addition to being part of the lateral load-resisting system, are responsible for bearing the weight of the structure during and after the earthquake. Therefore, in designing this system the boundary elements are desired to remain elastic after the complete yield of the web plate. Also, to provide uniform stress along the length and height of the wall, vertical and horizontal boundary elements must have high flexural stiffness. To reach this goal, the code provisions sometimes lead to the selection of non-economic sections for the beams and columns attached to the wall. In this study, To reduce the demand for vertical boundary elements attached to the wall and to make the design economical, vertical and inclined stiffeners are predicted inside the wall. These stiffeners redirect the plastic deformations mainly into the wall and away from the columns. To evaluate and compare the behavior of the proposed model, 30 finite element models were studied under lateral monotonic and cyclic loading. The results show that the addition of stiffeners, in addition to increasing the stiffness and lateral resistance of the system, increases the ductility of the lateral load resisting system and reduces the required flexural stiffness of horizontal boundary elements. https://ceej.aut.ac.ir/article_5161_8452a95c40e2b232acd9b8a8712935d7.pdf