Time dependent behavior of FRP-strengthened RC beams subjected to preload: Experimental study and finite element modeling

Jiang, Shiyong; Yao, Weilai; Chen, Jin; Tao, Shuai

doi:10.1016/j.compstruct.2018.05.110

Cited by 8 publications

(5 citation statements)

References 36 publications

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“…In relation to long-term effects, they can be considered by considering the quasi-permanent load combinations and the modular ratios that consider the creep coefficient. However, there are limited existing studies about the long-term behaviour of concrete elements strengthened with FRP [49][50][51].…”

Section: Serviceability Limit Statesmentioning

confidence: 99%

Strengthening Existing Concrete Structures with Fibre Reinforced Polymers (FRP) in the New Version of Eurocode 2

Oller¹,

Diego²,

Torres³

et al. 2022

hya

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This paper aims to introduce the content of Annex J “Strengthening of Existing Concrete Structures with CFRP” of Eurocode 2 [1]. This is first time that the design of adhesively bonded reinforcement with CFRP has been introduced in the European regulations through an informative annex. Annex J considers two different bonded strengthening techniques: externally bonded reinforcement (EBR) that consists of bonding CFRP strips or sheets to the surface of concrete elements, and near surface mounted reinforcement (NSM) that consists of embedding a CFRP strip or rod to a slot cut in the concrete cover. Since, the content of Annex J is new, asummary and background related to all aspects required for designing CFRP strengthened systems for concrete structures, are given in this paper.

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Section: Serviceability Limit Statesmentioning

confidence: 99%

Strengthening Existing Concrete Structures with Fibre Reinforced Polymers (FRP) in the New Version of Eurocode 2

Oller¹,

Diego²,

Torres³

et al. 2022

hya

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“…The nonlinear numerical stimulation of a beam reinforced with FRP reinforcements were used to examine time-dependent features of the beam (ABAQUS 6.17 [17]). Notably, the FE model used in this study was built on the foundations of a model created by Jiang et al [18], but it has been updated and modified to better represent the complicated mechanics of reinforced concrete. The effects of concrete ageing were incorporated, and methods for determining the time-dependent interfacial stress as well as developing a new procedure for analyzing the dynamics of the structural system have been developed.…”

Section: Femmentioning

confidence: 99%

Numerical Simulations of Composite Materials

Kumar

Sameer

Divya

2022

IOP Conf. Ser.: Earth Environ. Sci.

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Throughout the last decade, the usage of fiber reinforced polymer (FRP) reinforcements in civil infrastructure has risen exponentially, owing to its superior corrosion protection, high durability, and non-magnetization characteristics. Furthermore, as a result of the poor modulus of elasticity of the FRP composites and its non-yielding properties, significant deflection and broad fractures are seen in the FRP reinforced concrete components under consideration. The emphasis of present study is on the behavior of FRP-reinforced concrete beams. The total of nine finite element-based simulations were carried out (ABAQUS). The concrete damage plasticity modelling was considered while performing the analysis. Three different kinds of FRP bars such as CFRP, BFRP, and GFRP, were utilized as reinforcement in longitudinal and transverse direction for concrete beams. Literature was used to validate the numerical findings, and the parametric research has been carried out for varying factors, such as the diameter size, number of bars, the kind of FRP bars used, and the longitudinal arrangement of FRP bars. When CFRP bars were utilized, the load capacity increased by anywhere from 8.88% to 62.92%. Beams that have been reinforced with CFRP carry more weight than beams reinforced with GFRP and BFRP. The increase in CFRP bars tends to give some ductility to the beam via the bi-linear load-to-ductility curve. In similarly, the GFRP reinforced beams improve the ductility of the structure as a whole.

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“…Based on ABAQUS 6.12 [25], nonlinear numerical analysis was performed to study the time-dependent characteristics of concrete beam strengthened with external FRP reinforcement. e FE model used herein is on the basis of the one developed by Jiang et al [26]; however, the current FE model in this paper was further updated and is more advanced: the aging e ect of concrete was taken into account and the corresponding calculating method was presented, and also, the method for analyzing the time-dependent interfacial stress was developed.…”

Section: Fe Modelingmentioning

confidence: 99%

“…e model is in recursion form, which comforts codes programming and improves calculating e ciency. e detailed derivation process of Equations (8)-(10) can be found in Jiang et al [26], which is not presented herein for brevity.…”

Section: Modeling Of Time-dependent Materials Propertymentioning

confidence: 99%

See 1 more Smart Citation

Finite Element Modeling of FRP‐Strengthened RC Beam under Sustained Load

Jiang

Yao

Chen

et al. 2018

Advances in Materials Science and Engineering

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External bonding of FRP laminates to the tension soffit of concrete members has become a popular method for flexural strengthening. However, the long-term field performance of FRP-strengthened RC members under service conditions is still a concern, and more work needs to be done. Based on concrete smeared-crack approach, this paper presents a finite-element (FE) model for predicting long-term behavior of FRP-strengthened RC beam, which considers the time-dependent properties of all components including the aging effect of concrete. According to the comparison between theoretical predictions and test results, the validity of the FE model is verified. The interfacial edge stresses in adhesive layer were determined through appropriate mesh refinement near the plate end, and their time-dependent characteristics were investigated. The results show that creep of concrete and epoxy resin cause significant variations of the edge stresses with time. According to the research in this paper, the FE approach is found to be able to properly simulate the long-term behavior of the FRP-strengthened beam and help us better understand the complex changes in the stress state occurring over time.

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Time dependent behavior of FRP-strengthened RC beams subjected to preload: Experimental study and finite element modeling

Cited by 8 publications

References 36 publications

Strengthening Existing Concrete Structures with Fibre Reinforced Polymers (FRP) in the New Version of Eurocode 2

Strengthening Existing Concrete Structures with Fibre Reinforced Polymers (FRP) in the New Version of Eurocode 2

Numerical Simulations of Composite Materials

Finite Element Modeling of FRP‐Strengthened RC Beam under Sustained Load

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