Deterioration of FRP-to-Concrete Bond under Failure Loading

Harries, Kent A.; Aidoo, John; Zorn, Andrew Viccaro; Quattlebaum, Joshua B.

doi:10.1260/136943306779369446

Cited by 36 publications

(9 citation statements)

References 10 publications

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“…Some FRP materials are additionally susceptible to creep owing to sustained loads and adhesive bondlines are susceptible to damage from cyclic (fatigue) loads. 11 Research efforts associated with the use of FRP materials in concrete infrastructure offer some relevant guidance as to the effect of typically experienced environmental and mechanical loading conditions. When used in conjunction with a steel substrate, some additional environmental protection may be accorded the CFRP by the presence of fireproofing, topcoat or finishing systems.…”

Section: Environmental Exposure Creep and Fatigue Behaviourmentioning

confidence: 99%

Experimental assessment of bonded FRP-to-steel interfaces

Harries¹,

Webb²

2009

Proceedings of the Institution of Civil Engineers - Structures

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The use of bonded fibre-reinforced polymer (FRP) materials for the repair of civil infrastructure is becoming well established. The majority of applications are 'bond critical'; that is, the dominate limit state is affected by the FRP debonding from the substrate. Considerable research has been conducted on the behaviour of FRP bonded to a concrete substrate; however, there is a growing interest in using FRP bonded to a steel substrate. In the former case, bond behaviour is dominated by cohesive failure in the concrete substrate; in the latter, bond is dominated by adhesive behaviour. As a result of not needing to consider substrate failure in the case of FRP-to-steel applications, the FRP may be utilised much more efficiently, provided bond can be maintained. This paper briefly reviews factors affecting bond of FRP-to-steel and presents a relatively simple laboratory test method for assessing bond performance. The method is well suited to comparing performance of different applications, surface preparations, environmental exposures and so on, but also yields quantitative data in the form of the steadystate energy release rate useful for modelling and designing FRP-to-steel bonded interfaces.

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Section: Environmental Exposure Creep and Fatigue Behaviourmentioning

confidence: 99%

Experimental assessment of bonded FRP-to-steel interfaces

Harries¹,

Webb²

2009

Proceedings of the Institution of Civil Engineers - Structures

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“…The fatigue performance of the FRP-strengthened concrete structures has been studied, which reveals the basic mechanical principles under fatigue loading (Huang et al, 2017;Wight and Erki, 2003). As reported, FRP materials exhibit excellent fatigue behavior (Kim and Heffernan, 2008;Peng et al, 2016;Siddika et al, 2019), and the failure often initiates from the debonding of FRP materials (Deng et al, 2015;Harries et al, 2006;Wahab et al, 2012) or the fracturing of steel reinforcements (Aidoo et al, 2004;Papakonstantinou et al, 2001). Several models have been proposed to predict the fatigue life of the reinforced concrete (RC) structures strengthened with FRP composites (Aidoo et al, 2004;Al-Qaralleh and Toutanji, 2018) and some studies focused on the postfatigue behaviors of the FRP-strengthened structures (Sena-Cruz et al, 2012;Song and Hou, 2017).…”

Section: Introductionmentioning

confidence: 93%

“…To fully utilize the capacity of the FRP composites, a prestressed method was proposed and has been regarded as an excellent option (Triantafillou et al, 1992; Wight et al, 2001; Zhou et al, 2018). Extensive investigations were carried out on the strengthening effects (Garden et al, 1998; Yang et al, 2009), bonding behaviors (Aydin et al, 2016; Harries et al, 2006; Neale et al, 2006), and anchoring effects (Mohee et al, 2016; Nanni et al, 1996) of the concrete members strengthened with prestressed FRP. Numerical and theoretical methods were also regarded as effective methods to conduct the research (Baky et al, 2010; Carpinteri et al, 2009; Chen et al, 2016; Chen and Teng, 2001; Sturm et al, 2019; Valipour and Foster, 2013).…”

Section: Introductionmentioning

confidence: 99%

Experimental study on the mechanical and self-sensing behaviors of prestressed carbon fiber–reinforced polymer reinforced concrete composite structures

Wang

Yang

Chun-lin

et al. 2020

Advances in Structural Engineering

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A type of self-sensing prestressed carbon fiber–reinforced polymer reinforced concrete composite structure was proposed and studied, composed of reinforced concrete beam, prestressed carbon fiber–reinforced polymer plate, and long-gauge fiber Bragg grating sensors. The carbon fiber–reinforced polymer plate was prestressed and bonded to the bottom of the reinforced concrete beam. Two types of anchorage systems were compared and studied. The long-gauge fiber Bragg grating sensors were used as active elements for the self-sensing of mechanical responses, which were installed on the tensile rebars, carbon fiber–reinforced polymer plates, and concrete. A series of static and fatigue 4-point flexural experiments were carried out to study the bending and fatigue performances of the composite structures. After a prescribed number of fatigue loading cycles, monotonic flexural bending was performed to investigate the deterioration of properties. The results showed that the long-gauge fiber Bragg grating sensor is valid for the mechanical response sensing of the proposed structures. The compatibility of the prestressed carbon fiber–reinforced polymer plate and concrete in the pure bending zone is excellent even under fatigue loading. The load-carrying capacities were improved by more than 30% due to the application of prestressed carbon fiber–reinforced polymer plates. The stiffness was also improved remarkably and generally decreased with the accumulation of fatigue cycles linearly.

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“…However, other studies (Masoud et al, 2001;Breňa et al, 2005;Harries and Aidoo, 2005;Harries, 2005) reported that there is no corresponding increase in the fatigue life. Thus, it is believed that improvement in fatigue performance is only affected as long as the FRP is adequately bonded to the concrete.…”

Section: Introductionmentioning

confidence: 93%

Modelling of time-dependent bonding and debonding in structures externally strengthened with fibre reinforced polymer sheets

Diab

2009

IJMIC

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The use of fibre reinforced polymers (FRPs) as externally bonded reinforcements has gained widespread acceptance as an innovative technique for the maintenance, rehabilitation and upgrading of existing concrete structures. Significant enhancements in stiffness, strength and seismic performance of the structures can be achieved by this technique. Among extensive research efforts which have been paid worldwide, the author's research group at Ibaraki University in Japan has greatly contributed in this field. Although short-term behaviour of FRP-strengthened structures is intensively reported thus far, their long-term performance has not thoroughly elucidated yet. This paper presents the recent development in the long-term behaviour of concrete structures externally strengthened with FRP, particularly focusing on the FRP-concrete interface subjected to sustain and fatigue loads. Some suitable time-dependent models for creep and fatigue loading are also introduced. This review paper covers also a comparison between available guidelines and recommendations with the experimental results of time-dependent loading.Reference to this paper should be made as follows: Wu, Z. and Diab, H. (2009) 'Modelling of time-dependent bonding and debonding in structures externally strengthened with fibre reinforced polymer sheets', Int.

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Deterioration of FRP-to-Concrete Bond under Failure Loading

Cited by 36 publications

References 10 publications

Experimental assessment of bonded FRP-to-steel interfaces

Experimental assessment of bonded FRP-to-steel interfaces

Experimental study on the mechanical and self-sensing behaviors of prestressed carbon fiber–reinforced polymer reinforced concrete composite structures

Modelling of time-dependent bonding and debonding in structures externally strengthened with fibre reinforced polymer sheets

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