Experimental study and theoretical analysis on hysteretic #br#
performance of wooden variable friction damper
Xie Qifang1,2 Zhang Yi1 Wei Rong1 Li Shengying1 Guo Baosheng3
1. School of Civil Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China; 2. Key Lab of Structure Engineering and Earthquake
Resistance of the Ministry of Education, Xi’an University of Architecture and Technology, Xi’an 710055, China; 3. PPLabs, Shanghai 201203, China
Abstract：Based on the improvement of friction damper’s material and construction, a kind of wooden variable friction damper was invented in this paper. Low-cyclic reversed loading tests on 9 wooden variable friction dampers with different parameters were performed. The hysteretic performance of the damper were obtained. The influence of the slope of friction block and bolt preload on the energy dissipation capacity of the damper was analyzed, respectively. The hysteretic rules and corresponding hysteretic model were determined according to the mechanical mechanism of damper, and the hysteretic model was verified by experimental data. The results show that output force of the wooden variable friction dampers is significantly improved in large deformation, and the hysteretic curve is fuller, having the characteristics of energy dissipation in stages and showing stable and good energy dissipation capacity. The energy dissipation capacity of wooden variable friction damper is positively correlated with slope of wooden friction block as well as bolt preload. The hysteretic model developed can accurately reflect the performance of wooden variable friction damper and a good agreement on hysteretic curves between the experiment and theory can be found.
