Effect of modeling uncertainty on multi-limit state performance of controlled rocking steel braced frames

Quantifying and propagating uncertainties in structural response is critical to robust performance-based seismic assessments. This paper evaluates the influence of model parameter uncertainty on limit state assessment controlled rocking steel braced frames (CRSBFs). The dead load frame, fuse yield strength, initial post-tension (PT) force strength frame elements are random variables considered. Realizations 3-, 6- 9-story CRSBF nonlinear models constructed using variable instances generated by Latin Hypercube Sampling (LHS). realizations subjected multiple stripe analyses six sets hazard-consistent ground motions. Three states considered including immediate occupancy, repairability collapse prevention. probability distribution maximum transient residual story drift ratios, PT strain shear deformation also established. These four engineering demand parameters serve as basis for effect modeling examined comparing dispersion responses performance from “mean models” (i.e., based mean values variables) with those obtained LHS-generated models. results showed that had greatest impact CRSBF.