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Analytical bond strength of deformed bars in concrete confined with transverse reinforcement and FRP
Highlights Analysis of failure mechanisms with double confinement relying on the crack depth and width in concrete. An analytical approach to accurately estimate the bond strength of deformed bars in concrete with transverse reinforcement and FRP confinements. A general expression for bond-slip curves is available for different confinement conditions. A design recommendation to predict the minimum FRP thickness and bond length for seismic reinforcement.
Abstract To ensure the long-term stability and safety of concrete structures, it is critical to accurately analyze the internal transverse reinforcements and externally bonded fiber-reinforced polymer (FRP) confinement to bond performances of deformed bars in concrete. However, no prediction models are available for bond strength and the bond-slip response with double confinement (transverse reinforcement and FRP). To address these issues, the present study proposes a predictive model to evaluate the bond strength of deformed bars in concrete under double confinement. The focus is on determining the internal pressure at the reinforcement/concrete interface provided by the transverse reinforcement and FRP at various stages of concrete cracking. The integral absolute error (IAE) of 12.0% for the 93 experimental data from the training dataset shows that the proposed model outperforms the other models. A general model for a bond-slip response involving double confinement is proposed and validated, along with a design recommendation to predict the minimum FRP thickness and bond length for seismic reinforcement.
Analytical bond strength of deformed bars in concrete confined with transverse reinforcement and FRP
Highlights Analysis of failure mechanisms with double confinement relying on the crack depth and width in concrete. An analytical approach to accurately estimate the bond strength of deformed bars in concrete with transverse reinforcement and FRP confinements. A general expression for bond-slip curves is available for different confinement conditions. A design recommendation to predict the minimum FRP thickness and bond length for seismic reinforcement.
Abstract To ensure the long-term stability and safety of concrete structures, it is critical to accurately analyze the internal transverse reinforcements and externally bonded fiber-reinforced polymer (FRP) confinement to bond performances of deformed bars in concrete. However, no prediction models are available for bond strength and the bond-slip response with double confinement (transverse reinforcement and FRP). To address these issues, the present study proposes a predictive model to evaluate the bond strength of deformed bars in concrete under double confinement. The focus is on determining the internal pressure at the reinforcement/concrete interface provided by the transverse reinforcement and FRP at various stages of concrete cracking. The integral absolute error (IAE) of 12.0% for the 93 experimental data from the training dataset shows that the proposed model outperforms the other models. A general model for a bond-slip response involving double confinement is proposed and validated, along with a design recommendation to predict the minimum FRP thickness and bond length for seismic reinforcement.
Analytical bond strength of deformed bars in concrete confined with transverse reinforcement and FRP
Xu, Zhenwen (author) / Chen, Shikun (author) / Qian, Hao (author) / Wang, Tielong (author) / Liu, Yi (author) / Yan, Dongming (author)
Engineering Structures ; 280
2023-01-05
Article (Journal)
Electronic Resource
English
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