超声波检测混凝土构件缺陷类型试验研究

Experimental research on ultrasonic test for defect types of concrete component

介绍了超声波法检测混凝土缺陷的原理,通过制作不同缺陷类型的标准混凝土模型,并对试样进行超声波测试,展示测试波列图和分析声学参数与不同标准缺陷之间的关系,得出利用声速和幅度的组合表现综合判定构件内部的缺陷类型和大小程度的方法,提出缺陷测距比和超声波边缘效应的概念,在实际测点布置时,应避开构件边缘效应的干扰。

The principle of ultrasonic test for concrete defect is introduced in this paper. Ultrasonic test,based on standard concrete specimen with different defects in it,in which wave series are shown,analyzing relationship of acoustic parameters and various defects,provides a method which can determine the types and sizes of the defects inside structural components by concerning the speed and amplitude of sound waves. The concepts of ratio of defect to test distance and ultrasonic edge effect are put forward here and it＇s pointed out that the test points should be selected properly to avoid the edge effect.