Nondestructive testing of concrete crack repair quality by Lambwave technology
At present,the detection of the crack repair quality of defective concrete is mostly through the observation of the appearance,and the destructive detection is carried out on it after doubt arises.In order to explore a non-destructive testing method,this paper establishes a finite element model of defective concrete beams with cracks by applying ABAQUS software,selects the optimal excitation signal,applies Lamb wave to detect defective concrete beams in symmetric detection mode across the seams,and introduces two evaluation systems by com-paring the difference in energy of wavelet packet of the time-domain signals of the receiving area in the concrete member before and after repair to get the evaluation of the quality of crack repair.Indicator.The study shows that the application of Lamb wave technology has good effect in detecting the quality of concrete crack repair.
defective concretemending quality of concrete crackslamb wavesignal energy
万方数据
维普
