DAMAGE ASSESSMENT USING THE ENERGY DISSIPATION RATIO OF ACCELERATION SIGNALS
This paper proposes a novel damage identification method using the energy dissipation ratio (EDR) of acceleration signals. The efficiency of the method was verified by two numerical tests and a reinforced concrete beam experiment. One can obtain a consistent relationship between the EDR and the damage severity both in linear state and nonlinear state of the structure. In addition, the new method was compared with the means of modal-based damage identification utilizing Morlet Wavelet Transform. The results showed that mean EDR increased by 62.9% in linear state, while mean EDR decreased by 31.0% in nonlinear state when macrocracks were present; furthermore, EDR has more sensibility to damage severity than the natural frequency and damping ratio. Therefore, EDR is probably a promising global damage indicator in structural health monitoring which may be applicable to not only lightly damaged (in the linear elastic state) but also severely damaged systems (in the nonlinear plastic state) during the process of damage.
Damage identification energy dissipation ratio wavelet transform reinforced concrete beam linear and nonlinear state
Zhi-Gen Wu Guo-Hua Liu Zi-Hua Zhang Fang-Jian Zhu Zhong-Kai Xie
Institute of Hydraulic Structures & Water Environment,College of Civil Engineering & Architecture,Zhejiang University,Hangzhou 310027,P.R.China
国际会议
长沙
英文
324-330
2009-10-26（万方平台首次上网日期，不代表论文的发表时间）