APPLICATION OF EMPIRICAL MODE DECOMPOSITION TO PROCESS MEASURED STRAIN RESPONSES OF A BRIDGE
According to the characteristics of empirical mode decomposition (EMD) in data trend extraction, a method to process measured strain responses of a bridge is proposed. After decomposing a strain response into an oscillation component and a trend component by EMD, the physical meanings of each component are studied. Simulation analysis results of a steel truss bridge show that the trend component of the strain response corresponds to the static effect caused by the loads, while the oscillation component is relative to the dynamic effect. Therefore, the extraction of trend component from a strain response means the separation between static effect and dynamic effect of the bridge under given loads. Based on the large numbers of measured strain responses and train axes-weight data taken from the health monitoring system of the Nanjing Yangtze River Bridge (NYRB), the mechanism for complex responses of bridges under moving loads is investigated. Analysis results show that the proposed method is feasible and valid.
Xue-Min Wan Fang-Lin Huang Guang Ma Zhi-Jiang Li Jian-Jun Liu
School of Civil Engineering and Architecture, Central South University, Changsha 410075, P.R. China School of Resource and Safety Engineering, Central South University, Changsha 410083, P.R. China
国际会议
长沙
英文
940-944
2007-11-19（万方平台首次上网日期，不代表论文的发表时间）