Time reverse modeling of acoustic emissions in a reinforced concrete beam

被引：48

作者：

Kocur, Georg Karl ^{[1
,2
]}

Saenger, Erik H. ^{[3
]}

Grosse, Christian U. ^{[4
]}

Vogel, Thomas ^{[1
]}

机构：

[1] ETH, Inst Struct Engn, CH-8093 Zurich, Switzerland

[2] Halfen GmbH, Res Dev Engn, D-40746 Langenfeld, Germany

[3] Int Geothermal Ctr Bochum, D-44801 Bochum, Germany

[4] Tech Univ Munich, Chair Nondestruct Testing, Ctr Bldg Mat, D-81245 Munich, Germany

来源：

ULTRASONICS | 2016年 / 65卷

关键词：

Time reversal; Wave propagation; Elastic waves; Acoustic emission; Concrete; LOCALIZATION; PROPAGATION;

D O I：

10.1016/j.ultras.2015.10.014

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

The time reverse modeling (TRM) is applied for signal-based acoustic emission (AE) analysis of reinforced concrete (RC) specimens. TRM uses signals obtained from physical experiments as input. The signals are re-emitted numerically into a structure in a time-reversed manner, where the wavefronts interfere and appear as dominant concentrations of energy at the origin of the AE. The experimental and numerical results presented for selected AE signals confirm that TRM is capable of localizing AE activity in RC caused by concrete cracking. The accuracy of the TRM results is corroborated by three-dimensional crack distributions obtained from X-ray computed tomography images. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：96 / 104

页数：9

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