Restoring Force Model for Cross-Slanted Corrugated Steel Plate Shear Walls

To establish the restoring force model of the cross-slanted self-buckling-restrained corrugated steel plate shear wall (hereafter abbreviated as CCSPW), finite element parametric analysis was conducted on the hysteretic behavior of the CCSPW by considering four key influencing factors: the axial compression ratio, aspect ratio, inclination angle, and end plate thickness. Based on the obtained hysteresis curves and skeleton curves, the skeleton curves were dimensionlessly normalized and regression-fitted to establish a trilinear skeleton curve model together with the functional expressions for each loading stage. Furthermore, the stiffness-degradation laws of different loading and unloading paths were analyzed, and the corresponding stiffness-degradation functions were proposed to construct the restoring force model of CCSPW. The restoring force model was verified by comparing the calculated results with the finite element analysis results. The results indicate that CCSPW exhibits favorable energy-dissipation capacity and high bearing capacity; in particular, the energy-dissipation capacity weakens for the specimens with small aspect ratios, for which noticeable pinching of the hysteresis curves is observed. The proposed restoring force model is in good agreement with the finite element results, providing a theoretical reference for the seismic analysis of this shear wall.