Research on damage identification of beam bridges based on dynamic load test
In order to further improve the revealing ability of structural performance of bridge dynamic detection test and find a more efficient and practical damage identification for bridge structure,a new method of bridge damage identification is proposed,which takes vehicle-induced vibration response of bridge structure as source data,uses the continuous wavelet transform for signal processing and the signal singularity for signal processing.The wavelet coefficients of dynamic response signals under different damage conditions were analyzed by numeri-cal simulation;the damage location was carried out by the maximum value of the mode;and the Lipschitz index was calculated and the damage intensity was identified.The results show that there are requirements on the size of crack spacing,but the sports car excitation test using wavelet transform can accurately identify and analyze the structural damage in the absence of bridge model information and long-term excitation test,which has high engi-neering practical value.
vehicle-induced vibration of bridgedamage identificationcontinuous wavelet transformLipschitz exponent
NETL
NSTL
万方数据
