Lateral Load Behavior Analysis of a Novel Self-Centering Y-Eccentrically Braced Frames with Slip Connection Shear Link

Abstract

Reducing residual deformation of shear links and enhancing structural self-centering performance are two effective strategies to optimize the seismic resilience of Y-eccentrically braced frames. Based on the aforementioned concepts, a novel self-centering Y-eccentrically braced frame structure which composing of self-centering joints and slip connection shear link was introduced in this study. Firstly, a design methodology for the slip connection shear link and anticipated mechanical properties of the novel structure were proposed through theoretical analyses. Subsequently, finite element models were established based on previous experimental data to investigate the lateral load behavior of the novel structure by comparing it with a conventional structure. The results indicate that when possessing sufficient lateral load capacity and energy dissipation capacity, the novel structure exhibits exceptional self-centering performance. Finally, the energy dissipation and self-centering mechanism were obtained by conducting stress analysis on substructures under various seismic conditions. The analysis results indicate that the slip connection mechanism effectively mitigates relative displacement and damage to shear links, restricts frame damage, and enhances structural self-centering performance when combined with self-centering joints.