Seismic analysis of behavior and damage of multi-ribbed steel-plate shear walls

In this study, the Park-Ang damage model was refined based on the displacement and energy dissipation response behaviors of multi-ribbed steel-plate shear walls during earthquake. A novel method was developed to determine the inter-story displacement performance metrics of the steel-plate shear walls using damage indices. Building upon relevant experimental studies, the numerical modeling methods for the multi-ribbed low-yieldpoint steel-plate shear walls were validated based on relevant experimental research. By using the improved models, the effects of the wall height-to-thickness ratio, frame column dimensions, and wall-plate yield strength on the final displacement, displacement at yield, shear force at yield, and total energy dissipation of the shear walls were assessed. Further, an appropriate damage model based on the dual parameters of deformation and energy dissipation was developed for multi-ribbed steel-plate shear walls. The validity of the damage model was substantiated, while the damage index boundary values for various damage states were proposed as seismic performance objectives for the shear wall structures. The damage assessment results of the model correspond with the experimentally observed patterns. This study effectively describe the sequence of damage development in ribbed steel-plate shear walls and enables the accurate calculation of damage limits for a range of structural damage magnitudes, thereby providing benchmarks for the seismic design, assessment, and reliability analysis of such structural systems.