Fatigue damage assessment of reinforced concrete beam using acoustic emission technique / Noorsuhada Md Nor

Damage due to fatigue loading in a reinforced concrete (RC) beam is a crucial phenomenon that requires assessment. Acoustic emission (AE) technique can be used to identify the fatigue damage progression in the RC beam. Third point loading fatigue test was carried out in the laboratory of heavy struc...

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Main Author:	Md Nor, Noorsuhada
Format:	Thesis
Language:	English
Published:	2014
Subjects:	Concrete Strength and testing
Online Access:	https://ir.uitm.edu.my/id/eprint/16257/1/16257.pdf
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spelling	my-uitm-ir.162572022-11-15T08:01:41Z Fatigue damage assessment of reinforced concrete beam using acoustic emission technique / Noorsuhada Md Nor 2014 Md Nor, Noorsuhada Concrete Strength and testing Damage due to fatigue loading in a reinforced concrete (RC) beam is a crucial phenomenon that requires assessment. Acoustic emission (AE) technique can be used to identify the fatigue damage progression in the RC beam. Third point loading fatigue test was carried out in the laboratory of heavy structure on a small size RC beam of 150 mm x 150 mm x 750 mm and the actual size of RC beam of300 mm x 600 mm x 4050 mm. The fatigue test was carried out based on various ranges of maximum fatigue loading, based on the first crack load, Pcr and ultimate static load, Pult- Four objectives were outlined; to investigate the fatigue crack progression of RC beam specimens corresponding to the AE characteristic, to correlate damage classification of the RC beam specimens with respect to intensity analysis, to evaluate the fatigue crack characterization of RC beam specimens based on average frequency and RA value and to develop a new approach in fatigue damage assessment 'of RC beam specimens based on AE characteristics. RA value is the rise time divided by peak amplitude (us/v or ms/v). In the review, it was found that the analysis based on AE signal collected from channel basis is generally used. Channel basis is an analysis of AE data at a particular channel. Hence, a new approach in fatigue damage assessment of RC beam specimens based on AE signal collected from located event was developed. The located event is the analysis of AE data at a particular location which considers the AE signals captured from more than two (2) channels in a data set. It is also based on the time of arrival (TOA) of AE source to a particular channel. The analysis based on AE signal collected from the located event was compared with the AE signal collected from channel basis. It is found that the AE characteristics are dependent on the load application. Good agreements between AE characteristics, intensity zone, crack pattern and load application were found on the RC beams. The relationship between average frequency and RA value indicated clear trend with respect to crack classifications namely tensile crack and shear crack. It is found that the intensity of AE signal from located event shows reasonable plots to classify the damage corresponding to actual crack appearance than those from channel basis. 2014 Thesis https://ir.uitm.edu.my/id/eprint/16257/ https://ir.uitm.edu.my/id/eprint/16257/1/16257.pdf text en public phd doctoral Universiti Teknologi MARA (UiTM) Faculty of Civil Engineering Ibrahim, Azmi
institution	Universiti Teknologi MARA
collection	UiTM Institutional Repository
language	English
advisor	Ibrahim, Azmi
topic	Concrete Strength and testing
spellingShingle	Concrete Strength and testing Md Nor, Noorsuhada Fatigue damage assessment of reinforced concrete beam using acoustic emission technique / Noorsuhada Md Nor
description	Damage due to fatigue loading in a reinforced concrete (RC) beam is a crucial phenomenon that requires assessment. Acoustic emission (AE) technique can be used to identify the fatigue damage progression in the RC beam. Third point loading fatigue test was carried out in the laboratory of heavy structure on a small size RC beam of 150 mm x 150 mm x 750 mm and the actual size of RC beam of300 mm x 600 mm x 4050 mm. The fatigue test was carried out based on various ranges of maximum fatigue loading, based on the first crack load, Pcr and ultimate static load, Pult- Four objectives were outlined; to investigate the fatigue crack progression of RC beam specimens corresponding to the AE characteristic, to correlate damage classification of the RC beam specimens with respect to intensity analysis, to evaluate the fatigue crack characterization of RC beam specimens based on average frequency and RA value and to develop a new approach in fatigue damage assessment 'of RC beam specimens based on AE characteristics. RA value is the rise time divided by peak amplitude (us/v or ms/v). In the review, it was found that the analysis based on AE signal collected from channel basis is generally used. Channel basis is an analysis of AE data at a particular channel. Hence, a new approach in fatigue damage assessment of RC beam specimens based on AE signal collected from located event was developed. The located event is the analysis of AE data at a particular location which considers the AE signals captured from more than two (2) channels in a data set. It is also based on the time of arrival (TOA) of AE source to a particular channel. The analysis based on AE signal collected from the located event was compared with the AE signal collected from channel basis. It is found that the AE characteristics are dependent on the load application. Good agreements between AE characteristics, intensity zone, crack pattern and load application were found on the RC beams. The relationship between average frequency and RA value indicated clear trend with respect to crack classifications namely tensile crack and shear crack. It is found that the intensity of AE signal from located event shows reasonable plots to classify the damage corresponding to actual crack appearance than those from channel basis.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Md Nor, Noorsuhada
author_facet	Md Nor, Noorsuhada
author_sort	Md Nor, Noorsuhada
title	Fatigue damage assessment of reinforced concrete beam using acoustic emission technique / Noorsuhada Md Nor
title_short	Fatigue damage assessment of reinforced concrete beam using acoustic emission technique / Noorsuhada Md Nor
title_full	Fatigue damage assessment of reinforced concrete beam using acoustic emission technique / Noorsuhada Md Nor
title_fullStr	Fatigue damage assessment of reinforced concrete beam using acoustic emission technique / Noorsuhada Md Nor
title_full_unstemmed	Fatigue damage assessment of reinforced concrete beam using acoustic emission technique / Noorsuhada Md Nor
title_sort	fatigue damage assessment of reinforced concrete beam using acoustic emission technique / noorsuhada md nor
granting_institution	Universiti Teknologi MARA (UiTM)
granting_department	Faculty of Civil Engineering
publishDate	2014
url	https://ir.uitm.edu.my/id/eprint/16257/1/16257.pdf
_version_	1783733491593117696

Fatigue damage assessment of reinforced concrete beam using acoustic emission technique / Noorsuhada Md Nor

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