NONDESTRUCTIVE EVALUATION OF DAMAGE IN CONCRETE UNDER UNIAXIAL COMPRESSION

被引：0
|
作者：
Shokouhi, P. [1 ]
Zoega, A. [1 ]
Wiggenhauser, H. [1 ]
机构：
[1] BAM Fed Inst Mat Res & Testing, D-12205 Berlin, Germany
来源：
REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION, VOLS 29A AND 29B | 2010年 / 1211卷
关键词：
Nondestructive Testing (NDT); Microcracking; Sonic wave velocity; Concrete; Load; Stress; WAVE-PROPAGATION; STRESSES; VELOCITY;
D O I：
10.1063/1.3362249
中图分类号：
V [航空、航天];
学科分类号：
08 ; 0825 ;
摘要：
Surface wave velocities over the sonic frequency range (< 20 KHz) were measured on concrete specimens undergoing various cycles of loading and unloading. Acoustic Emission test (AE) was conducted simultaneously to monitor the microcracking activities. The sonic surface wave velocity was found to be highly stress-dependent. The observed changes in surface wavespeed are repeatable and follow a particular trend. By measuring the wave velocities in both loading and unloading phases, the effects of stress and stress-induced damages could be distinguished. The observed trend could be explained by a combination of acoustoelasticity and microcracking theories.
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收藏
页码：1525 / 1532
页数：8
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