TY - JOUR
T1 - Parametric study on bond of GFRP bars in alkali-activated cement concrete
AU - Tekle, B. H.
AU - Khennane, A.
AU - Kayali, O.
N1 - Funding Information:
The scholarship support to the first author from UNSW Canberra is greatly acknowledged.
Publisher Copyright:
© 2019 9th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering, CICE 2018. All Rights Reserved.
PY - 2018
Y1 - 2018
N2 - Bond behaviour plays an important role in the design and performance of reinforced concrete structures. In this study, a beam-end specimen finite element model is used to perform a parametric study. The bond between the GFRP bar and Alkali Activated Cement (AAC) concrete is modelled by surface-based cohesive behaviour. The accuracy of the model is validated by comparing different predictions with experimental results. The effect of concrete cover, bar diameter, concrete compressive strength, lead length (unbonded length at loaded end), embedment length and elastic modulus of GFRP bars on bond behaviour is investigated. Each of these parameters is varied on a range of applicable values to study its influence on bond behaviour. The parametric study showed that the bond behaviour is mainly affected by concrete cover, bar diameter, embedment length and compressive strength of the concrete. The effect of elastic modulus of GFRP bar is not as pronounced as that of the other parameters while the influence of lead length can be avoided by providing enough unbonded length at the loaded end. The parametric study is further used to calibrate a well-known bond equation and develop a new regression equation for predicting the maximum bond stress. The predicted results from these equations showed a good agreement with the experimental as well as with the finite element results.
AB - Bond behaviour plays an important role in the design and performance of reinforced concrete structures. In this study, a beam-end specimen finite element model is used to perform a parametric study. The bond between the GFRP bar and Alkali Activated Cement (AAC) concrete is modelled by surface-based cohesive behaviour. The accuracy of the model is validated by comparing different predictions with experimental results. The effect of concrete cover, bar diameter, concrete compressive strength, lead length (unbonded length at loaded end), embedment length and elastic modulus of GFRP bars on bond behaviour is investigated. Each of these parameters is varied on a range of applicable values to study its influence on bond behaviour. The parametric study showed that the bond behaviour is mainly affected by concrete cover, bar diameter, embedment length and compressive strength of the concrete. The effect of elastic modulus of GFRP bar is not as pronounced as that of the other parameters while the influence of lead length can be avoided by providing enough unbonded length at the loaded end. The parametric study is further used to calibrate a well-known bond equation and develop a new regression equation for predicting the maximum bond stress. The predicted results from these equations showed a good agreement with the experimental as well as with the finite element results.
KW - Alkali activated cement concrete
KW - Bond properties
KW - GFRP bars
KW - Parametric study
UR - http://www.scopus.com/inward/record.url?scp=85077554916&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:85077554916
SN - 0950-0618
SP - 811
EP - 819
JO - Construction and Building Materials
JF - Construction and Building Materials
T2 - 9th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering, CICE 2018
Y2 - 17 July 2018 through 19 July 2018
ER -