Finite-Element Validation of U-Shaped Flexural Plates Integrated into a Novel Brace Dissipator

Abstract

Metallic dissipators have gained considerable attention in the seismic structural design industry in recent years because of their ability to provide stable hysteresis behavior and excellent energy dissipation capacity. Among these dissipators, the U-shaped flexural plate (UFP) has gained wide acceptance. This research primarily focuses on the numerical modeling of UFP and its innovative application, known as the multiple UFP dissipater (MUD). The research methodology involves conducting finite-element analysis of both the single UFP model and the MUD model under monotonic and cyclic loading conditions using Abaqus. The numerical models were validated against the experimental results. The findings of this study provide valuable insights into the local deformation behavior of UFP during rolling motion, including the variations in the yield area and stress distribution at critical cross sections. Additionally, a parametric study was performed to investigate the influence of various geometric parameters, such as the section modulus and the slenderness ratio of the flange of UFP. The numerical model of MUD enables a comprehensive understanding of how different components within MUD function as an integrated unit. Furthermore, the relationship between the overall stiffness of MUD and the stiffness of each individual component within the system was discussed.