Numerical Investigation of Seismic Performance of Thin Steel Shear Walls Without Stiffeners with Passive Defense Approach

Since 1973, the steel shear wall system has been considered by researchers and structural designers as a lateral resistance system. This lateral resistance system has shown good performance against threats. According to the cost-benefit principle in passive defense, the results of a study on the behavior of shear walls show that the steel shear wall system will save about 50% in steel consumption compared to the flexural frame system. Since the purpose of passive defense is to reduce the vulnerability of assets against natural and man-made threats, the steel shear wall system as a lateral bearing system, in addition to being light compared to concrete shear walls, has high hardness and ductility, and in addition to Reducing the effects of the natural threat of an earthquake will also work effectively against man-made threats such as bombs and missiles and its effects, such as blast waves. Despite its high efficiency, this system has not been used significantly in Iran. In this article, various responses of thin steel shear wall system without stiffeners against lateral resistance have been investigated and the effect of three main parameters of this system has been studied. These three parameters are: beam-to-column connection type, stiffness of the beam and column (the stiffness of the border points of the frame) and the thinness ratio of the sheet (the ratio of the distance between the center line of the column and the thickness of the sheet).