Bond mechanism and bond strength of GFRP bars to concrete: A review

Yan, Fei; Lin, Zhibin; Yang, Mijia

doi:10.1016/j.compositesb.2016.04.068

Cited by 238 publications

(100 citation statements)

References 57 publications

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“…Also, as summarized in Table 1, most of the existing predicting equations for the maximum bond strength only considered concrete compressive strength. Previous review articles, in the field of the bond-slip phenomenon, also ignored the effect of concrete composition, and only concentrated on concrete compressive strength [32][33][34][35]. However, results reported by the literature show a different trend in which powder types and content, aggregate types and contents and also admixture can significantly change the bond properties [36].…”

Section: References Equationsmentioning

confidence: 99%

A critical review of the effect of concrete composition on rebar–concrete interface (RCI) bond strength: A case study of nanoparticles

2020

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Minimum concrete cover for rebar, rebar diameter, concrete compressive strength, embedded length of rebar, and lateral reinforcement by stirrups are the crucial factors considered in existing predicting equations and regulations for predicting rebar-concrete interface (RCI) bond strength. However, considerable effects of concrete composition on RCI are ignored in design codes and investigations. This paper intends to comprehensively highlight the critical aspects of this research gap. Additionally, a practical experimental approach is described in the present study to efficiently consider the effect of the new generations of concrete on RCI bond strength. Finally, nano-concrete is considered as a case study to show the importance of nanoparticle types on RCI bond strength. Overall results show that studying the microstructure of the transition zone at RCI is essential to accompany with the RCI bond strength for considering new generations of concrete in reinforced concrete structures. Additionally, the current study emphasizes that more investigations are necessary to be conducted by future works to fill the existing research gaps in RCI.

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Section: References Equationsmentioning

confidence: 99%

A critical review of the effect of concrete composition on rebar–concrete interface (RCI) bond strength: A case study of nanoparticles

2020

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“…Domestic and overseas scholars have performed much research and analysis on the bond‐slip constitutive relation. Among their research results, the BPE Model , the BPE Modified Model (mBPE Model) , the Smooth Curve Model , and the Malvar Model are common and classic models. The BPE model is applicable to the bond slip model of steel bars, and the latter models take into account the difference between the bond properties of FRP bars and steel bars.…”

Section: Test Results and Analysismentioning

confidence: 99%

Bond‐Slip Behavior Between GFRP Bars and Mortar Based on Pull‐Out Tests

et al. 2018

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Bond performance is important in glass fiber reinforcement polymer (GFRP) bar reinforced mortar structure. To study bond behavior between GFRP bars and mortar, pull‐out tests were conducted on nine cylinder specimens with reinforced carbon sheets. The loading mode included monotonic loading and cyclic loading. Bond strength, slip, bond stiffness, and residual bond properties were investigated and fitted to bond‐slip curves of classical models. The results show that monotonic loading, cyclic constant loading, and cyclic variable loading have little effect on the ultimate bond strength between a GFRP bar and mortar. The bond‐slip curves have the same change laws. Under cyclic constant loading, bond stiffness increases with cycles loading times and is basically stable after 10 times, and the bond‐slip curves show the same characteristics. Under cyclic variable loading, bond stress–strain has a linear characteristic, bond stiffness presents a hardening tendency, and bond‐slip curve is similar and stable in each loading–unloading process. The ascending stage and descending stage of the bond‐slip curve match the modified Eligehausen, Popov, and Bertero (mBPE) model, no horizontal line is observed in the peak load stage, the descending stage curve is approximately linear, and the residual stage curve exhibits a fluctuating decreasing tendency. Based on the test results, a Gaussian function and its parameters are proposed for the expression of the residual stage. POLYM. COMPOS., 40:2840–2849, 2019. © 2018 Society of Plastics Engineers

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“…In previous research, primarily the Malvar model [18], BPE, and CMR models [19,20] are used for the analysis of the bond behavior of FRP bars. When compared with the Malvar model, the BPE model and CMR models are simple and convenient for application [44], thus these two models will be the primary focus in this paper. Equation (2) describes the ascending branch of of the BPE model and the same branch of the CMR model by Equation (3).…”

Section: Bond Stress-slip Relationship Model Between Gfrp Bar and Stimentioning

confidence: 99%

Experimental Research on Bond Behavior between GFRP Bars and Stirrups-Confined Concrete

Gao

Zhang

et al. 2019

Applied Sciences

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This paper presents the results of a series of pullout tests that were performed on Glass-fiber-reinforced polymer (GFRP) bars embedded in concrete, while providing a detailed report on the influence of various variables that impinge upon bond behavior, such as the surface characteristics and diameter of the bars, concrete strength, as well as the confined effect of stirrups. The Bertero-Popov-Eligehausen (BPE) and Cosenza-Manfredi-Realfonzo (CMR) models analyzed the bond stress (τ)–slip (s) relationship between GFRP bar and stirrups-confined concrete. The tests results indicate that when the bond failure interface only occurs on the surface of a GFRP bar, the bond strength is not dependent upon the concrete strength. Moreover, the results indicate that in comparison to specimens without stirrups, their stirrup-containing counterparts are more prone to pullout failure with greater ductility and higher bond strength and corresponding slip. The BPE and CMR models are able to investigate the τ-s relationship between GFRP bars and the stirrups-confined concrete with accuracy. With the experimental data, the specific parameters in the models classified by surface characteristics have been suggested.

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Bond mechanism and bond strength of GFRP bars to concrete: A review

Cited by 238 publications

References 57 publications

A critical review of the effect of concrete composition on rebar–concrete interface (RCI) bond strength: A case study of nanoparticles

A critical review of the effect of concrete composition on rebar–concrete interface (RCI) bond strength: A case study of nanoparticles

Bond‐Slip Behavior Between GFRP Bars and Mortar Based on Pull‐Out Tests

Experimental Research on Bond Behavior between GFRP Bars and Stirrups-Confined Concrete

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