Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Monitoring fracture of steel corroded reinforced concrete members under flexure by acoustic emission technique
HighlightsFracture of the corroded beam specimens using AE technique has been conducted.Magnitude of RA value decrease with the increase of corrosion level.Index of damage was higher when the corrosion level increased at early stage of damage.Weibull damage function was introduced to estimate the remaining flexural capacity of the specimens.Tensile fracture became more dominant with an increase in corrosion level.
AbstractAcoustic 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.
Monitoring fracture of steel corroded reinforced concrete members under flexure by acoustic emission technique
HighlightsFracture of the corroded beam specimens using AE technique has been conducted.Magnitude of RA value decrease with the increase of corrosion level.Index of damage was higher when the corrosion level increased at early stage of damage.Weibull damage function was introduced to estimate the remaining flexural capacity of the specimens.Tensile fracture became more dominant with an increase in corrosion level.
AbstractAcoustic 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.
Monitoring fracture of steel corroded reinforced concrete members under flexure by acoustic emission technique
Zaki, Ahmad (Autor:in) / Chai, Hwa Kian (Autor:in) / Behnia, Arash (Autor:in) / Aggelis, Dimitrios G. (Autor:in) / Tan, Jun Ying (Autor:in) / Ibrahim, Zainah (Autor:in)
Construction and Building Materials ; 136 ; 609-618
15.11.2016
10 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
| British Library Online Contents | 2017
Residual flexure capacity of corroded reinforced concrete beams
| Elsevier | 2006
Residual flexure capacity of corroded reinforced concrete beams
| Online Contents | 2007