Evaluation of Friction-Slit Hybrid Dampers in Moment - Resisting Steel Frames

Abstract

This paper investigates the friction-slit hybrid dampers with two different behaviors in the moment- resisting steel frames. For this purpose, 5, 10 and 15 stories, models of steel construction frames have been considered, and the mentioned also dampers have been added as a brace. These structural models were subjected to nonlinear static analyzes (pushover) and nonlinear dynamic analysis (time history) using seven pairs of far-field records. Nonlinear behavior and response in the analysis were also
considered by applying nonlinear characteristics for the dampers in the frame and by assigning plastic hinges to structural members. Therefore, the probability of failure decreases. Based on the numerical results, adding this damper to the frame, reduces drift by 33% the maximum displacement of the roof by 23% in pushover analysis, and reduces displacement, velocity and acceleration by 60%, 70% and 45%, and ultimately reduces the kinetic energy by 51% in time history analysis.