Investigating the feasibility of a novel asymmetrical friction damper

Abstract

This paper presents a novel asymmetrical self-locking mechanism (ASLM) and compact asymmetrical friction dampers (AFDs) designed to enhance serviceability in vibration control for structures. The proposed ASLM is based on frictional surfaces that are engage to provide the necessary damping feature. Simplified and detailed theoretical models are developed and utilized for the parametric study of the proposed damper. A comprehensive parametric study demonstrates a near-linear relationship between the slope angle of the AFD and its corresponding damping force when the slope angle is less than 45 degrees. Additionally, the proposed damper is fabricated based on the parametric study. Computational and theoretical models are also validated experimentally, with energy dissipation errors below 10%. Moreover, the practical applicability and effectiveness of the proposed AFD are evaluated by implementing it on a benchmark structure. Through non-linear time history analysis, a significant reduction of 17.2 % in interstory drift and nearly perfect in residual interstory drift are observed compared to the control group. These results highlight the potential of the novel ASLM and AFD to enhance vibration control efficiency in diverse engineering applications.