$Monitoring fracture of steel corroded reinforced concrete members under flexure by acoustic emission technique$

Monitoring fracture of steel corroded reinforced concrete members under flexure by acoustic emission technique

Acoustic emission (AE) technique is used for monitoring and evaluating the influence of corrosion on the structural behaviour of steel reinforced concrete (RC) beams under three-point flexure test. In this study, steel corrosion was accelerated by electro-chemical method utilising a direct current (...

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Main Authors:	Zaki, A., Chai, H.K., Behnia, A., Aggelis, D.G., Tan, J.Y., Ibrahim, Z.
Format:	Article
Published:	Elsevier 2017
Subjects:	TA Engineering (General). Civil engineering (General)
Online Access:	http://dx.doi.org/10.1016/j.conbuildmat.2016.11.079 http://dx.doi.org/10.1016/j.conbuildmat.2016.11.079

id	um-18837
recordtype	eprints
spelling	um-188372018-06-07T08:03:04Z Monitoring fracture of steel corroded reinforced concrete members under flexure by acoustic emission technique Zaki, A. Chai, H.K. Behnia, A. Aggelis, D.G. Tan, J.Y. Ibrahim, Z. TA Engineering (General). Civil engineering (General) Acoustic emission (AE) technique is used for monitoring and evaluating the influence of corrosion on the structural behaviour of steel reinforced concrete (RC) beams under three-point flexure test. In this study, steel corrosion was accelerated by electro-chemical method utilising a direct current (DC) power supply and 5% sodium chloride (NaCl) solution. The steel corrosion that was induced into beam specimens casting were estimated at 0%, 4.55% and 32.37%, respectively, according to mass loss of steel reinforcement. Based on observations during static load test, the damage developed in the specimens could be classified into four different stages, namely, micro-cracking, first visible cracks, cracks distribution, as well as damage localization and yielding. Analysis of the AE data reveals distinguishable trends for RA value and average frequency (AF) registered for different corrosion levels, respectively. Moreover, the index of damage (ID) derived from the AE energy parameters obtained during the first stage of damage was found to be useful as an indicator for evaluating the extent of corrosion damage of RC beam specimens at initial loadings. In addition, to provide a practical application of AE toward life span estimation of corroded beam specimen, a Weibull damage function was introduced to estimate the remaining flexural capacity of the beam specimens. Based on analysis as well, it is noted that tensile fracture became more dominant with an increase in corrosion level. Elsevier 2017 Article PeerReviewed http://dx.doi.org/10.1016/j.conbuildmat.2016.11.079 Zaki, A.; Chai, H.K.; Behnia, A.; Aggelis, D.G.; Tan, J.Y.; Ibrahim, Z. (2017) Monitoring fracture of steel corroded reinforced concrete members under flexure by acoustic emission technique. Construction and Building Materials <http://eprints.um.edu.my/view/publication/Construction_and_Building_Materials.html>, 136. pp. 609-618. ISSN 0950-0618 http://eprints.um.edu.my/18837/
repository_type	Digital Repository
institution_category	Local University
institution	University Malaya
building	UM Research Repository
collection	Online Access
topic	TA Engineering (General). Civil engineering (General)
spellingShingle	TA Engineering (General). Civil engineering (General) Zaki, A. Chai, H.K. Behnia, A. Aggelis, D.G. Tan, J.Y. Ibrahim, Z. Monitoring fracture of steel corroded reinforced concrete members under flexure by acoustic emission technique
description	Acoustic emission (AE) technique is used for monitoring and evaluating the influence of corrosion on the structural behaviour of steel reinforced concrete (RC) beams under three-point flexure test. In this study, steel corrosion was accelerated by electro-chemical method utilising a direct current (DC) power supply and 5% sodium chloride (NaCl) solution. The steel corrosion that was induced into beam specimens casting were estimated at 0%, 4.55% and 32.37%, respectively, according to mass loss of steel reinforcement. Based on observations during static load test, the damage developed in the specimens could be classified into four different stages, namely, micro-cracking, first visible cracks, cracks distribution, as well as damage localization and yielding. Analysis of the AE data reveals distinguishable trends for RA value and average frequency (AF) registered for different corrosion levels, respectively. Moreover, the index of damage (ID) derived from the AE energy parameters obtained during the first stage of damage was found to be useful as an indicator for evaluating the extent of corrosion damage of RC beam specimens at initial loadings. In addition, to provide a practical application of AE toward life span estimation of corroded beam specimen, a Weibull damage function was introduced to estimate the remaining flexural capacity of the beam specimens. Based on analysis as well, it is noted that tensile fracture became more dominant with an increase in corrosion level.
format	Article
author	Zaki, A. Chai, H.K. Behnia, A. Aggelis, D.G. Tan, J.Y. Ibrahim, Z.
author_facet	Zaki, A. Chai, H.K. Behnia, A. Aggelis, D.G. Tan, J.Y. Ibrahim, Z.
author_sort	Zaki, A.
title	Monitoring fracture of steel corroded reinforced concrete members under flexure by acoustic emission technique
title_short	Monitoring fracture of steel corroded reinforced concrete members under flexure by acoustic emission technique
title_full	Monitoring fracture of steel corroded reinforced concrete members under flexure by acoustic emission technique
title_fullStr	Monitoring fracture of steel corroded reinforced concrete members under flexure by acoustic emission technique
title_full_unstemmed	Monitoring fracture of steel corroded reinforced concrete members under flexure by acoustic emission technique
title_sort	monitoring fracture of steel corroded reinforced concrete members under flexure by acoustic emission technique
publisher	Elsevier
publishDate	2017
url	http://dx.doi.org/10.1016/j.conbuildmat.2016.11.079 http://dx.doi.org/10.1016/j.conbuildmat.2016.11.079
first_indexed	2018-09-06T06:54:12Z
last_indexed	2018-09-06T06:54:12Z
_version_	1610840122079576064

Monitoring fracture of steel corroded reinforced concrete members under flexure by acoustic emission technique

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