In order to study the attenuation characteristics of elastic wave propagation in concrete with different slurry-aggregate ratio,three groups of concrete beams with different slurry-aggregate ratio were designed.The acoustic emission signals of simulated lead breaking were extracted,and the characteristic parameters and spectrum analysis of acoustic emission signals were carried out.The results show that the amplitude,energy and signal strength of the three groups of specimens decrease exponentially with the increase of propagation distance,and the attenuation coefficient b decreases with the increase of slurry-aggregate ratio.The energy parameters are most sensitive to the change of slurry-aggregate ratio,and the signal intensity and amplitude decrease in turn.With the increase of slurry-aggregate ratio,the attenuation of peak frequency between Sensor 1#and Sensor 3#shows a decreasing trend.
关键词
混凝土/浆骨比/声发射/衰减规律
Key words
concrete/slurry-aggregate ratio/acoustic emission/attenuation law
维普
万方数据