Influence of rebars on elastic-wave-based synthetic aperture focusing technique images for detecting voids in concrete structures

NCUIR > Engineering College > Department of Civil Engineering > journal & Dissertation > Item 987654321/99941

Please use this identifier to cite or link to this item: https://ir.lib.ncu.edu.tw/handle/987654321/99941

Title:	Influence of rebars on elastic-wave-based synthetic aperture focusing technique images for detecting voids in concrete structures
Authors:	王仲宇;Tong, Jian-Hua;Chiu, Chin-Lung;Wang, Chung-Yue;Liao, Shu-Tao
Contributors:	工學院土木工程學系
Keywords:	Computer simulation;Defects;Elastic wave;Image detection;Imaging;Impact-echo method;Mathematical models;Nondestructive testing;Nondestructive testing (NDT);Rebar;Reinforcing steels;Synthetic aperture focusing technique (SAFT)
Date:	2014-01-01
Issue Date:	2026-04-21 13:42:21 (UTC+8)
Publisher:	Elsevier Ltd.;Elsevier Ltd
Abstract:	摘要： Using elastic-wave-based NDT methods to detect defects in RC structures is difficult because of the interference of rebars. In this study, the interference effect on the quality of SAFT images was quantitatively explored using a series of numerical simulations. Furthermore, two concrete specimens were fabricated for experimental verification. The experimental results exhibited strong agreement with those of quantitative analyses used in numerical simulations. These results indicated that using SAFT images to expose the defects under a layer of rebars is feasible. Moreover, a useful guideline for selecting the impacting source to produce a high-quality SAFT image is proposed. •Influence of rebars on elastic-wave-based SAFT image of concrete was surveyed.•Coherence function was introduced to evaluate the image quality quantitatively.•Relation between correlation coefficient and wavelength-to-diameter ratio was found.•Experimental results exhibit good agreement with those of quantitative analysis.•Result can be a useful reference to get better SAFT image of reinforced concrete. 出版者： Elsevier Ltd 出版日期： 2014-12-01 出處： NDT & E international : independent nondestructive testing and evaluation, 2014-12, Vol.68, p.33-42 版權： 2014 Elsevier Ltd 識別號： ISSN: 0963-8695 識別號： EISSN: 1879-1174 識別號： DOI: 10.1016/j.ndteint.2014.08.001
Appears in Collections:	[Department of Civil Engineering] journal & Dissertation

Files in This Item:

File	Description	Size	Format
index.html		0Kb	HTML	13	View/Open

社群 sharing

Loading...