Seismic Vulnerability Assessment of Steel Moment Resisting Frame Equipped with Friction Damper

Abstract

This research evaluates the likelihood of seismic collapse for high-rise Steel Moment Resisting Frames (SMRF)
designed with a recently developed Performance-Based Plastic Design (PBPD) approach and equipped with friction dampers.
A 21-storey SMRF designed according to the PBPD method for three different displacement ductility ratios is equipped with
supplementary friction dampers to overcome largely concentrated and non-uniformly distributed inter-storey drifts at higher
storeys. Multi-record Incremental Dynamic Analysis (MIDA) of three different ductility designs of SMRF with and without
supplementary friction dampers is performed under the suite of selected vital motion records. The seismic fragility of these
PBPD designs of SMRF with and without additional friction damper is used to identify the optimum range of the seismic
hazards to minimize the total likelihood of damages under solid ground motion. Results show that friction dampers are highly
effective in reducing the probability of high-rise SMRF seismic collapse designed with the PBPD approach.