Fig。 13。 Stiffness–drift ratio curves of SPSWs with various plate thicknesses。
steel may result in employment of infill plates with various slenderness ratios and geometrical–material bifurcation characteristics。 Hence, this study aims at addressing the specifications of LYP steel shear wall systems on the basis on the aforementioned infill plate slenderness classification。
Buckling stability of the SPSW models is illustrated in Fig。 11, where out-of-plane displacements are plotted against the applied lateral load。
As seen in Fig。 13, all four LYP steel shear wall models have similar and stable stiffness performance in the elastic and inelastic ranges of structural response。 The stiffness of the SPSW models gradually dimin- ishes as the drift ratio increases。 However, most of the stiffness reduc- tion occurs at lower drift ratios due to yielding and buckling of the LYP steel infill plate。 Also, as shown in Figs。 12 and 13, the plate and frame first yields in the SPSW models occur at 0。1% and 0。6% average drift ra- tios, respectively。 It is believed that the stable stiffness performance and the desirable plate–frame yielding sequence in all four SPSW models are mainly contributed by the LYP steel material properties