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

作　　者：LI DongSheng RUAN Tao YUAN JunHui 

机构地区：[1]State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology,Dalian 116024,China

出　　处：《Science China(Technological Sciences)》2012年第10期2893-2901,共9页中国科学（技术科学英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant No. 50808030);the Doctoral Fund of Ministry of Education of China (Grant No. 200801411102);Science and Technology Support Program of China (Grant No. 2011BAK02B04);the Fundamental Research Funds for the Central Universities (Grant No. DUT12LK12)

摘　　要：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.

关 键 词：ultrasonic guided waves reinforced concrete interface delamination structural health monitoring 

分 类 号：TP306[自动化与计算机技术—计算机系统结构] TV221[自动化与计算机技术—计算机科学与技术]