Experimental and Numerical Investigation of the Effect of a New Type of Channel Stiffener on the Seismic Behavior of Steel Shear Wall Incorporated Moment Resisting Frames

摘要

In recent years, Steel Plate Shear Walls, a seismically resistant system with the ability to increase the energy dissipation capacity, have been widely employed. In the present work, with the aim of assessing and improving the seismic parameters of moment resisting frames with steel shear walls, four experimental samples (a special steel moment resisting frame, a moment resisting frame incorporating a thin steel shear wall, a moment resisting frame with steel shear wall and short UNP stiffeners, and a moment resisting frame with steel shear wall and buckling-resistant knee brace) were investigated. The samples were subjected to quasi-static pushover loading until the drift of 10% was reached. Then, based upon verified Finite Element models, the effect of axial loading on the seismic parameter of the frames including effective stiffness, ultimate strength, ductility, strength reduction factor, and energy dissipation capacity was evaluated. The results showed that UNP stiffeners exert a significant influence on the seismic behavior of moment resisting frames with steel shear walls and therefore they are recommended to be used in regions with high seismic risk.