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Paper Abstract and Keywords
Presentation 2017-01-25 13:00
[Poster Presentation] Diagnosis of Fire Damage of Concrete by Using High-Intensity Aerial Ultrasonic Waves Method -- Imaging Using Higher Harmonics --
Kazuya Okitsu, Ayumu Osumi, Youichi Ito (Nihon Univ.) US2016-92
Abstract (in Japanese) (See Japanese page) 
(in English) We developed a technology to diagnose fire damage on the concrete surface in the building where fire occurred using vibration characteristics generated on concrete surface by irradiation of high-intensity aerial ultrasonic wave. In previous study, it was clarified that a diagnosis of fire damage can be estimated by the change of Young's modulus of concrete exposed to high temperature from the vibration characteristics of concrete surface. By the way, a micro crack is generated on the concrete surface exposed to high temperature and the surface property changes complicatedly. It is useful to simultaneously measure changes in the surface condition of concrete in order to conduct detailed fire diagnosis because these micro crack affects sound waves propagating on the concrete surface. In this report, we investigated the surface condition of the target using harmonic components by nonlinearity of high-intensity aerial ultrasonic wave.
Keyword (in Japanese) (See Japanese page) 
(in English) High-intensity ultrasonic waves / Concrete / Fire-damaged / Nondestructive method / Harmonics / / /  
Reference Info. IEICE Tech. Rep., vol. 116, no. 419, US2016-92, pp. 107-112, Jan. 2017.
Paper # US2016-92 
Date of Issue 2017-01-18 (US) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
and
reproduction		 All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF US2016-92

Conference Information
Committee EA US  
Conference Date 2017-01-25 - 2017-01-26 
Place (in Japanese) (See Japanese page) 
Place (in English) Doshisha Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) [Joint Meeting on Acoustics and Ultrasonics Subsociety] Engineering/Electro Acoustics, Ultrasonic and Underwater Acoustics, and Related Topics 
Paper Information
Registration To US 
Conference Code 2017-01-EA-US 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Diagnosis of Fire Damage of Concrete by Using High-Intensity Aerial Ultrasonic Waves Method 
Sub Title (in English) Imaging Using Higher Harmonics 
Keyword(1) High-intensity ultrasonic waves  
Keyword(2) Concrete  
Keyword(3) Fire-damaged  
Keyword(4) Nondestructive method  
Keyword(5) Harmonics  
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1st Author's Name Kazuya Okitsu  
1st Author's Affiliation Nihon University (Nihon Univ.)
2nd Author's Name Ayumu Osumi  
2nd Author's Affiliation Nihon University (Nihon Univ.)
3rd Author's Name Youichi Ito  
3rd Author's Affiliation Nihon University (Nihon Univ.)
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Speaker Author-1 
Date Time 2017-01-25 13:00:00 
Presentation Time 90 minutes 
Registration for US 
Paper # US2016-92 
Volume (vol) vol.116 
Number (no) no.419 
Page pp.107-112 
#Pages 6 
Date of Issue 2017-01-18 (US) 

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