Enhancing seismic resilience of steel EBFs through directed damage energy absorbing plates

Based on a resilience oriented design concept, steel Eccentrically Braced Frames (EBFs) equipped with directed damage vertical link beams containing Energy Absorbing (EA) plates are proposed to enhance seismic performance at the system level. This study develops a quantitative framework for assessing the seismic resilience of such structures, focusing on their ability to maintain functionality, recover efficiently, and minimize repair time and cost after seismic events. The structural configuration integrates a Directed Damage Link (DDL) mechanism into the EBF system, directing inelastic deformation toward replaceable EA plates. Analytical data include frame geometry, material properties, and link plate configurations, which are modeled in ABAQUS using nonlinear time history analyses under realistic regional ground motions. The study inputs include system level models, material strength parameters, and earthquake records. At the same time, the outputs are evaluated using a quantitative resilience framework formulated with analytical and performance based equations that link structural response to functionality and recovery potential. The novelty of this research lies in bridging detailed nonlinear structural behavior with resilience quantification, transforming localized inelastic response into comprehensive system level metrics. This integrated methodology establishes a foundation for resilience based design and clarifies the relationship between energy dissipation mechanisms and post-earthquake recovery potential in steel seismic systems.