چكيده به لاتين
Abstract:
In recent years, the system of steel plate shear walls, which has an appropriate seismic performance, has been used as a lateral loads resisting system in construction of new buildings and strengthening of existing buildings. Steel Plate Shear Wall is made from thin steel plate which is framed by the beams and columns of structural system. This system offers several advantages as compared to the other usual lateral load resisting systems. Steel saving, speed of erection, reduced foundation cost, and increased usable space in buildings are some apparent advantages of the steel plate shear walls
A steel shear wall resist lateral loading via tension field action and tension field formation in the plate depends on rigidity of vertical boundary elements. Since, rigidity of vertical boundary elements is high in a typical steel shear wall; therefore the design will be uneconomical. To overcome to this problem, semi supported steel shear wall was offered. Besides, yielding base plate can be used that provide the uplift for columns resulting in reduction of structural parameters. In the present study, effect of yielding base plate on the behavior of semi supported steel shear wall was investigated. Yielding base plate was placed under the main and secondary columns. Cyclic behavior of studied models was performed in ABAQUS software. Models were in there groups with different bay lengths. Obtained results show that base shear, initial stiffness and dissipated energy decreases when yielding base plate is used under columns. Results of finite element studies show that base shear of the sample with yielding base plate under on secondary column is maximum compared to others. Also, when yielding base plate is used under all main and secondary columns, base shear is minimum. Other results show that acting stresses on the columns decreases when yielding base plate is used. In addition, ductility factor of semi supported steel shear walls with yielding base plate in the present study are not less than that of semi supported steel shear walls without yielding base plate and are suitable.
Keywords: Semi supported steel shear wall, base shear, finite element, initial stiffness, deformation, ductility
