Effect of load pattern in the generation of higher harmonic amplitude in concrete using nonlinear ultrasonic test

Non-destructive testing is used in monitoring health of structures. In this paper, nonlinear ultrasonic test was done to analyze the sensitivity of the fundamental and higher harmonics with the internal damage in concrete. Good sensitivity produces significant quantitative changes in the nonlinear s...

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Main Authors: Ongpeng, Jason Maximino C., Oreta, Andres Winston C., Hirose, Sohichi
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Published: Animo Repository 2016
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Online Access:https://animorepository.dlsu.edu.ph/faculty_research/3737
https://animorepository.dlsu.edu.ph/context/faculty_research/article/4739/type/native/viewcontent/jact.14.205
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spelling oai:animorepository.dlsu.edu.ph:faculty_research-47392021-10-11T02:04:04Z Effect of load pattern in the generation of higher harmonic amplitude in concrete using nonlinear ultrasonic test Ongpeng, Jason Maximino C. Oreta, Andres Winston C. Hirose, Sohichi Non-destructive testing is used in monitoring health of structures. In this paper, nonlinear ultrasonic test was done to analyze the sensitivity of the fundamental and higher harmonics with the internal damage in concrete. Good sensitivity produces significant quantitative changes in the nonlinear spectral amplitude parameter corresponding to the deviation of load. In actual conditions, structures have different design strength with varying water cement ratio. In addition, it is experiencing loading and unloading. These are considered as major factors that induce effect in the behavior of ultrasonic test result in concrete. Past researches have only considered increasing application of load with single loading pattern. This study aims to investigate the effect of load application pattern in the generation of higher harmonics. Ordinary concrete specimens of size 150mm x 150mm x 150mm with water-cement ratio WC40 and WC60 were casted and tested using uniaxial compression machine with two load patterns: a.) single loading pattern from 0% to 100% and, b.) multiple loading/unloading pattern. Ultrasonic test with pitch-catch configuration was conducted at each loading state to record the fundamental and higher harmonic generation in the concrete. The experimental results showed that there was a good sensitivity for 3rd harmonic amplitude parameter DA when it was subjected to single loading pattern for both WC40 and WC60. On the other hand, good sensitivity was only observed for 2nd harmonic amplitude parameter DA when it was subjected to multiple loading/unloading pattern for both WC40 and WC60. This showed that the 2nd harmonic amplitude was consistent and sensitive when repeated load was applied for low and high water cement ratio. © Copyright 2016 Japan Concrete Institute. harmoni 2016-01-01T08:00:00Z text text/html https://animorepository.dlsu.edu.ph/faculty_research/3737 info:doi/10.3151/jact.14.205 https://animorepository.dlsu.edu.ph/context/faculty_research/article/4739/type/native/viewcontent/jact.14.205 Faculty Research Work Animo Repository Structural analysis (Engineering) Load factor design Concrete—Testing Civil Engineering
institution De La Salle University
building De La Salle University Library
continent Asia
country Philippines
Philippines
content_provider De La Salle University Library
collection DLSU Institutional Repository
topic Structural analysis (Engineering)
Load factor design
Concrete—Testing
Civil Engineering
spellingShingle Structural analysis (Engineering)
Load factor design
Concrete—Testing
Civil Engineering
Ongpeng, Jason Maximino C.
Oreta, Andres Winston C.
Hirose, Sohichi
Effect of load pattern in the generation of higher harmonic amplitude in concrete using nonlinear ultrasonic test
description Non-destructive testing is used in monitoring health of structures. In this paper, nonlinear ultrasonic test was done to analyze the sensitivity of the fundamental and higher harmonics with the internal damage in concrete. Good sensitivity produces significant quantitative changes in the nonlinear spectral amplitude parameter corresponding to the deviation of load. In actual conditions, structures have different design strength with varying water cement ratio. In addition, it is experiencing loading and unloading. These are considered as major factors that induce effect in the behavior of ultrasonic test result in concrete. Past researches have only considered increasing application of load with single loading pattern. This study aims to investigate the effect of load application pattern in the generation of higher harmonics. Ordinary concrete specimens of size 150mm x 150mm x 150mm with water-cement ratio WC40 and WC60 were casted and tested using uniaxial compression machine with two load patterns: a.) single loading pattern from 0% to 100% and, b.) multiple loading/unloading pattern. Ultrasonic test with pitch-catch configuration was conducted at each loading state to record the fundamental and higher harmonic generation in the concrete. The experimental results showed that there was a good sensitivity for 3rd harmonic amplitude parameter DA when it was subjected to single loading pattern for both WC40 and WC60. On the other hand, good sensitivity was only observed for 2nd harmonic amplitude parameter DA when it was subjected to multiple loading/unloading pattern for both WC40 and WC60. This showed that the 2nd harmonic amplitude was consistent and sensitive when repeated load was applied for low and high water cement ratio. © Copyright 2016 Japan Concrete Institute. harmoni
format text
author Ongpeng, Jason Maximino C.
Oreta, Andres Winston C.
Hirose, Sohichi
author_facet Ongpeng, Jason Maximino C.
Oreta, Andres Winston C.
Hirose, Sohichi
author_sort Ongpeng, Jason Maximino C.
title Effect of load pattern in the generation of higher harmonic amplitude in concrete using nonlinear ultrasonic test
title_short Effect of load pattern in the generation of higher harmonic amplitude in concrete using nonlinear ultrasonic test
title_full Effect of load pattern in the generation of higher harmonic amplitude in concrete using nonlinear ultrasonic test
title_fullStr Effect of load pattern in the generation of higher harmonic amplitude in concrete using nonlinear ultrasonic test
title_full_unstemmed Effect of load pattern in the generation of higher harmonic amplitude in concrete using nonlinear ultrasonic test
title_sort effect of load pattern in the generation of higher harmonic amplitude in concrete using nonlinear ultrasonic test
publisher Animo Repository
publishDate 2016
url https://animorepository.dlsu.edu.ph/faculty_research/3737
https://animorepository.dlsu.edu.ph/context/faculty_research/article/4739/type/native/viewcontent/jact.14.205
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