Data for Functional Recovery Design Parameters for Five Additional Seismic Force-Resisting Systems (DSMF, SCBF, PCHMF, SCCSW, SRSMW), in Development of Recovery-Based Seismic Design Requirements for the 2026 NEHRP Provisions

The qualification procedure described in "Seismic Design Qualification Procedure for Functional Recovery for Lateral Force-Resisting Systems" (Blowes et al., 2026) and adopted by the 2026 NEHRP Seismic Provisions Appendix A is applied to a slate of five "resilient" and non-proprietary structural systems. Strength modification coefficients (Rfr) and allowable drift limits (Δafr) that achieve targeted functional recovery performance are recommended for each system and a range of functional recovery categories. For each system, an archetype space is generated to capture design variations and configurations, and performance groups are identified to delineate the archetype space into salient features that significantly impact structural properties. Designs are then generated for a range of Rfr and Δafr values, with each designed to a risk-targeted Functional Recovery Earthquake (FRER). A probabilistic damage assessment is then carried out on structural components in the building, and the probability of safety-critical structural damage (SCSD), as determined by a fault tree, is calculated for the design space. Lastly, Rfr and Δafr combinations that satisfy SCSD criteria across the performance group mean and maximum cases are recommended. For many systems, the design for reduced drift led to higher accelerations, and component ductility reduction (Rμfr) factors are adjusted as safeguards for acceleration-sensitive component design forces.