A new non-contacting non-destructive testing method for defect detection in concrete

被引：89
|
作者：
Mori, K
Spagnoli, A
Murakami, Y
Kondo, G
Torigoe, I
机构：
[1] Univ Parma, Dept Civil Engn, I-43100 Parma, Italy
[2] Kumamoto Univ, Dept Mech Engn, Kumamoto 8608555, Japan
[3] Kyushu Univ, Dept Mech Sci & Engn, Higashi Ku, Fukuoka 81281, Japan
来源：
NDT & E INTERNATIONAL | 2002年 / 35卷 / 06期
关键词：
concrete; defect detection; impact-echo testing; laser vibrometer; non-destructive testing method; shock wave;
D O I：
10.1016/S0963-8695(02)00009-9
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
A new non-destructive testing (NDT) method for defect detection in concrete structures is presented. The method is based on the dynamic response of flawed concrete structures subjected to impact loading. Conversely to similar NDT techniques, such as the impact-echo method, the present method uses non-contacting devices for both impact generation (a shock tube producing shock waves) and response monitoring (laser vibrometers measuring concrete surface velocity). Experimental and numerical (finite element) studies have been carried out for concrete specimens containing artificial defects (penny-shaped cracks parallel to the free surface) with varying length and depth. According to the experimental and numerical results, it appears that the present method enables an effective detection of defects, particularly in the range of shallow defects. (C) 2002 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：399 / 406
页数：8
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