The quasi-static cyclic behaviour of CFRP-to-concrete bonded joints: An experimental study and a damage plasticity model

Zhou, Hao; Fernando, Dilum; Chen, Guangming; Kitipornchai, S.

doi:10.1016/j.engstruct.2017.10.007

Cited by 30 publications

(15 citation statements)

References 13 publications

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“…The numerical procedure was validated with respect to the results reported in two different experimental campaigns reported in the literature [13,20]; details about this double validation are reported, respectively, in two previously published works [19,21].…”

Section: Numerical Implementation and Experimental Validationmentioning

confidence: 99%

“…On the one hand, a coupled damage-plasticity model, based on a bilinear elasticsoftening bond-slip law, has been proposed [18]. On the other hand, a model based on fracture mechanics concepts was formulated with the aim to simulate by assuming two alternative bond-slip laws (namely, linear-exponential and bilinear) [19]: the model was validated with respect to some relevant experimental results available in the literature [13,20] and the elastic-exponential bond-slip law demonstrated a slightly higher accuracy in simulating the considered experimental evidence.…”

Section: Introductionmentioning

confidence: 99%

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Low-Cycle Fatigue of FRP Strips Glued to a Quasi-Brittle Material

Martinelli

Caggiano

2021

Materials

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This paper aims at further advancing the knowledge about the cyclic behavior of FRP strips glued to quasi-brittle materials, such as concrete. The results presented herein derive from a numerical model based on concepts of based on fracture mechanics and already presented and validated by the authors in previous works. Particularly, it assumes that fracture processes leading to debonding develop in pure mode II, as is widely accepted in the literature. Starting from this assumption (and having clear both its advantages acnd shortcomings), the results of a parametric analysis are presented with the aim of investigating the role of both the mechanical properties of the interface bond–slip law and a relevant geometric quantity such as the bond length. The obtained results show the influence of the interface bond–slip law and FRP bond length on the resulting cyclic response of the FRP-to-concrete joint, the latter characterized in terms of S-N curves generally adopted in the theory of fatigue. Far from deriving a fully defined correlation among those parameters, the results indicate general trends that can be helpful to drive further investigation, both experimental and numerical in nature.

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Section: Numerical Implementation and Experimental Validationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Low-Cycle Fatigue of FRP Strips Glued to a Quasi-Brittle Material

Martinelli

Caggiano

2021

Materials

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“…The load carrying capacity of such structures strengthened with EB FRP laminates often relies on the interfacial shear stress transfer mechanism of the bonded interface [5,6]. Therefore, numerous studies have been carried out to investigate the bond behaviour of FRP-to-concrete [7][8][9] and FRP-to-steel [6,[9][10][11] bonded joints under mechanical loading. Different models have been proposed to model the constitutive behaviour of the FRP-to-steel and FRP-to-concrete bonded interfaces [6,12] as well as the behaviour of structures strengthened EB FRP laminates [13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

The bond behaviour of CFRP-to-steel bonded joints with varying bond properties at elevated temperatures

Zhou

Torres

Fernando

et al. 2019

Engineering Structures

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The mechanical properties of different adhesives at elevated temperatures can change differently due to the differences in adhesive molecular chain structure. Therefore, a profound understanding of the effect of these property changes on the bond behaviour of carbon fibre reinforced polymer (CFRP)-to-steel bonded joints is of great importance when designing bonded CFRP strengthening systems for steel structures. Existing studies on CFRP-to-steel bonded joints under monotonic loading have clearly shown that both adhesive mechanical properties and geometrical properties of the bonded joints (e.g. bond length) may significantly influence the bond strength. Existing studies on adhesive mechanical properties under elevated temperatures have shown that the variation of adhesive mechanical properties, especially fracture energy with temperature depends significantly on the adhesive type. No comprehensive study exists so far on understanding the effects of key mechanical and geometrical parameters of a CFRP-tosteel bonded joints at elevated temperatures on bond strength. This paper presents a study aimed at understanding the effects of different parameters such as temperature dependent mechanical properties of adhesive and bond length on the behaviour of CFRP-to-steel bonded joints at elevated temperatures.Results of this study showed that (1) load-displacement behaviour of the bonded joints is sensitive to temperature variations, (2) for bonded joints with sufficiently long bond length, the ultimate load depends only on the fracture energy of the final temperature, and (3) the maximum load of the bonded joints depends on the ratio between the loading and heating rates.

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“…While there are no existing theoretical studies on the bond-slip behavior of CFRP-to-steel bonded interface under cyclic loading, several analytical bond-slip models have been proposed for CFRP-toconcrete bonded interfaces under cyclic loading [52][53][54][55][56]. The failure mode in CFRP-to-concrete bonded interfaces (cohesion failure within concrete) is different from the failure mode in CFRP-tosteel bonded interfaces (cohesion failure within adhesive).…”

Section: Damage Plasticity Model For Frp-to-concrete Interfacesmentioning

confidence: 99%