Wavelet Transform Singularity Theory-Based Method Research On Frame Structure Damage Identification

Significance of the building structure health diagnosis in nearly two decades and more obvious structural damage identification and damage identification method is applied from a proposal to have a great development, but most damage identification methods are based on the structural damage after a change, damage to the front and rear of the power you need to response analysis, resulting in injury were compared, so there are some limitations. Moreover, the damage identification method of signal analysis in the frequency domain, or only in the time domain, do not take full advantage of signal when only frequency information. Address these inadequacies, using wavelet frequency analysis of the characteristics of structural damage identification method based on wavelet transform.This paper describes the application of the principle of wavelet transform and wavelet transform in the diagnosis of building structure using the ASCE prepared Benchmark model data generation procedure to obtain the structure of the response signal simulation selected wavelet Bior building structure response signal wavelet transform detail signal use the transformation of the building structure health diagnosis, determine the time and location of the presence of structural damage and structural damage occurred.These research found that when the building structural damage, the details of the wavelet transform signal appears spikes and damage location nearer point, the greater the peak height of the wavelet transform detail signals of acceleration response; farther away from the damage location, peak height smaller. The article also verify the sampling frequency of damage identification found, through simulation, to better identify the effect can be obtained when the sampling frequency greater than1kHz.