Equivalent Viscous Damping Numerical Analyze (EVDNA) for Coupled Steel Plate Shear Walls (CSPSWs) using cyclic analysis

One of the new methods for providing lateral resistance against earthquake and wind loads is to use coupled steel shear walls (CSPSWs). The couples steel shear wall is composed of two separate steel shear walls connected to each other by a coupling beam. In new design methods, it is important to consider nonlinear behaviour and energy absorption and as a result, equivalent viscous damping (EVD) analysis for this type of structural systems will be of great importance. In this study, values of equivalent viscous damping have been determined for four one-storey CSPSWs with different coupling beam lengths based on cyclic loading method and energy absorption of models has been investigated. The EVD value is derived from summation of linear behaviour- and nonlinear behaviour-induced damping values. In this paper, the AISC ۲۰ design guideline of steel shear walls were used to design the CSPSW model. In order to comparative study, four single-storey CSPSWs with constant total span width, modelled via ABAQUS software, have been used. Then, cyclic analysis of models was performed and EVD value was calculated using mentioned method above. At last, we fitted the EVD values by conventional methods and compared them with each other. According to obtained results, decreasing the coupling beam length (i.e., profile weight reduction) leads to a reduction in steel consumption amount and to an increase in coupling degree. From the linear static curve, it can be said that increasing the span width in each steel shear wall results in a reduction in ultimate strength.

کلیدواژه ها:

coupled steel plate shear wall ، equivalent viscous damping ، nonlinear behaviour ، cyclic analysis