Residual drift risk of self-centering steel MRFs with novel steel column bases in near-fault regions

This paper evaluates the potential of novel steel column bases to reduce residual drift risk buildings located at near-fault regions when installed post-tensioned self-centering moment-resisting frames (SC-MRFs). To this end, a prototype building is designed that consists either conventional (MRFs) or SC-MRFs equipped with base (SC-MRF-CBs). The MRFs and are used as benchmark frames. modelled in OpenSees where material geometrical non-linearities considered along stiffness strength degradation. A set 91 ground motions different pulse periods perform incremental dynamic analysis (IDA), which each motion scaled appropriately until storey limits exceeded. probability exceedance these then computed function intensity period velocity pulse. Finally, results IDA combined probabilistic seismic hazard models account for directivity evaluate compare study. Results show predicted performance influenced by motions. use significantly reduces SC-MRF-CB exhibits best performance. highlights effectiveness combining beam-column connections base, showing improves MRF SC-MRF 80% 50%, respectively.