Experimental Study of Structural Damage Simulation based on MR Damper
Lin Youxin1, Jia Ziguang2， Ren Liang2，Li Hongnan2，Cheng Mingtao1, Zhang Peng2
1. Electric Power Research Institute, Guangdong Power Grid Corporation, Guangzhou 510080, China; 2.Faculty of Infrastructure Engineering, Dalian University of Technology, Dalian 116024,China
Abstract：This paper presents an experimental method to simulate stiffness reduction of compressed member using magneto-rheological damper (MR damper). The compressional stiffness is changed by current regulation of MR damper. In a transmission tower partial truss model dynamic experiment, simulation of instantaneous compressional stiffness reduction is carried out based on this approach. The dynamic response is processed by joint time frequency analysis, through which the damage time is to be figured out precisely. The result shows that this method is effective in model experiment.
2014, Vol. 33 
