Seismic design parameters (R, C_d, and Ω₀) for uncoupled composite plate shear walls−concrete filled (C‐PSW/CF)

Composite Plate Shear Walls−Concrete Filled (C-PSW/CF) are an innovative seismic force resisting system recently adapted for building applications. The walls consist of parallel steel faceplates connected with tie bars and filled concrete. This paper summarizes the results a recent FEMA P695 study completed to verify design parameters uncoupled C-PSW/CFs rectangular flange plate boundary elements. Seven archetype structures were: (i) designed, (ii) modeled using benchmarked fiber-based finite element analysis approach, (iii) subjected nonlinear pushover analysis, (iv) incremental dynamic failure 22-sets scaled ground motions, (v) were statistically analyzed assess performance. These ranged from three (3) twenty-two (22) stories included both planar C-shaped configurations. As part this process, recommendations stiffness approximations linear developed. Additionally, these post-processed determine rotation strain demands at base basis, maximum considered, level earthquakes. showed that demand earthquakes comparable regardless motion. Ultimately, approach verified R factor 6.5, Cd 5.5, Ω0 2.5