Inspection of reinforced concrete interface delamination using ultrasonic guided wave non-destructive test technique

An ultrasonic-guided wave（UGW） is a very promising tool in the field of structural health monitoring and non-destructive test.Numerical analysis was used to simulate the propagation in the rebar and explore the characteristics of UGW in the steel rebar waveguide.Two-dimensional fast Fourier transfor...

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Bibliographic Details
Published in:Science China. Technological sciences 2012-10, Vol.55 (10), p.2893-2901
Main Authors: Li, DongSheng, Ruan, Tao, Yuan, JunHui
Format: Article
Language:English
Subjects:
Concretes
Delaminating
Delamination
Engineering
Nondestructive testing
Rebar
Reinforcing steels
Ultrasonic testing
检验
混凝土界面
破坏性测试
结构健康监测
试验技术
超声导波
钢筋
非破坏性试验
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Summary:An ultrasonic-guided wave（UGW） is a very promising tool in the field of structural health monitoring and non-destructive test.Numerical analysis was used to simulate the propagation in the rebar and explore the characteristics of UGW in the steel rebar waveguide.Two-dimensional fast Fourier transform was used to process the numerical results and to evaluate the damage.Subsequently,different UGW test influence factors were investigated.The results clearly showed that both the group velocity and the amplitude of longitudinal modes were not very sensitive to stress and temperature variations.However,the received UGW signal energy decreased with the increasing concrete strength.Finally,the interface condition between the concrete and the rebar was investigated.Time-domain and frequency-domain analyses were used to process the received signals.Different interface delamination lengths of the UGW energy attenuation were analyzed and a relationship was obtained.This study successfully proved that UGW is an effective tool in the non-destructive test of reinforced concrete interface delamination.
ISSN:1674-7321
1869-1900
DOI:10.1007/s11431-012-4882-x