Akademik Veri Yönetim Sistemi
Structures, cilt.81, ss.1-26, 2025 (SCI-Expanded)
Eccentrically Braced Frames (EBFs) are commonly utilized in seismic design due to their favorable balance between strength, stiffness, and energy dissipation capacity. Among their components, the shear link plays a critical role in controlling the inelastic behavior and distributing seismic demand. This study investigates the seismic behavior of short-link EBF systems subjected to pulse-type ground motions (PGMs). To improve structural performance, a Uniform Damage Distribution (UDD) approach is implemented, aiming to achieve a more balanced energy dissipation across stories. This study investigates the effectiveness of the UDD strategy by varying the shear link cross-sections along the height of a six-story EBF structure to mitigate the concentration of damage in lower stories and enhance the overall resilience of the structure under strong velocity pulses. Nonlinear time-history analyses (NTHAs) are conducted using seismic records categorized by pulse characteristics (e.g., pulse period, PGV/PGA, and pulse amplitude). Several main performance criteria are systematically compared between the reference model and the UDD-optimized model, including inter-story drift ratios (IDRs), top-floor displacements, residual IDRs, plastic hinge distributions, and energy components (input vs. hysteretic). It has been demonstrated that the UDD-based optimization significantly enhanced seismic performance by reducing top-story displacements and peak IDRs by over 60 %, limiting plastic deformations to LS or IO levels, and achieving more uniform energy dissipation. Furthermore, the study reveals that the response variability of short-link EBFs to pulse characteristics can be substantially reduced through targeted link section size optimization. These improvements demonstrate the UDD concept's potential as an effective, energy-based design strategy for short-link EBF systems, which provides practical insights for performance-based design and retrofit strategies in seismically active regions influenced by PGMs.