Analysis of the nonlinear creep behavior of concrete/FRP-bonded assemblies

Houhou, Nourredine; Benzarti, Karim; Quiertant, Marc; Chataigner, Sylvain; Flety, André; Marty, Céline

doi:10.1080/01694243.2012.697387

Cited by 45 publications

(52 citation statements)

References 24 publications

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“…Viscoelasticity has been examined for FRP to concrete adhesive joints by several studies [19][20][21][22], although these did not examine the effect of creep upon the long-term performance of the strengthened structure. Zhang and Wang [23] developed a finite element (FE) model for a strengthened concrete beam and found that the axial force transferred from the reinforced concrete (RC) beam to the strengthened FRP plate reduces with time due to viscoelasticity in the adhesive layer, but they did not consider the elevated temperature effects, which could bring more significant reduction in FRP axial force and the corresponding reduction on the effectiveness of the strengthening system.…”

Section: Introductionmentioning

confidence: 99%

Linear creep of bonded FRP-strengthened metallic structures at warm service temperatures

Wang

Stratford

2021

Construction and Building Materials

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Section: Introductionmentioning

confidence: 99%

Linear creep of bonded FRP-strengthened metallic structures at warm service temperatures

Wang

Stratford

2021

Construction and Building Materials

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“…In other words, if an effect of positioning exists, it is expected to be less important than the one induced by cyclic loading. Indeed, it is recalled that the bonding performances of CFRP with concrete substrate is usually assessed from tests carried out on samples that are strengthened by bonding the CFRP on the concrete substrate located below: pull-out tests with CFRP bonded on the upper face of concrete slabs (see for example [29,30]), shear tests with CFRP bonded on the upper face of concrete blocks [31][32][33] and small beam test with CFRP bonded while the beam is upside down [20,28]. Moreover, the cyclic loading during CFRP installation was not expected to damage the CFRP/concrete bonded joint but rather to have a detrimental effect on the formation of the matrix of the CFRP material.…”

Section: Test Proceduresmentioning

confidence: 99%

Effect of the Cyclic Crack Opening-Closure during Epoxy-Curing Period of a CFRP Strengthening System Bonded on Concrete Substrate

et al. 2022

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This article investigates the potential detrimental effects of cyclic load during the installation of externally bonded (EB) carbon fiber-reinforced polymer (CFRP) on a damaged reinforced concrete (RC) structure. Four RC specimens were tested in three point bending to study the consequences of crack cyclic opening-closure during epoxy-curing period. A first RC specimen (without bonded CFRP) was loaded monotonically up to failure to serve as undamaged control sample. The three other specimens were pre-cracked before being subjected to a fatigue loading procedure to simulate service condition of a damaged RC structure. Two of the three pre-cracked specimens were strengthened by EB CFRP. One specimen was repaired before the fatigue test while the other one was repaired during the fatigue test. Finally, remaining capacities of all three pre-cracked specimens were measured through monotonic bending tests until failure. It was found that, although bonding of CFRP reinforcement during cyclic load can induce some interesting features with regard to serviceability, cyclic crack opening and closing alters the cure process of epoxy located below the initial crack and decreases the effectiveness of the strengthening at ultimate state. Extended experimental studies are then needed to assess reliable safety factor for the design of repairing operations in which the bridge has to be maintained in service during CFRP installation.

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“…Rheological properties of the FRP-strengthened system are dominated by the resin matrix. High level of sustained loading, undercured resin, and higher service temperature increase creep deformation which can lead to excessive deformation at the level of structural component [ 57 , 58 ]. FRP reinforced structures are susceptible to impact damage during their service life (collision with vehicles and flying objects).…”

Section: Materials Selection Environmental Exposure and Load Conmentioning

confidence: 99%

Durability of Externally Bonded Fiber-Reinforced Polymer Composites in Concrete Structures: A Critical Review

Tatar

Milev

2021

Polymers

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Externally bonded fiber-reinforced polymer composites have been in use in civil infrastructure for decades, but their long-term performance is still difficult to predict due to many knowledge gaps in the understanding of degradation mechanisms. This paper summarizes critical durability issues associated with the application of fiber-reinforced polymer (FRP) composites for rehabilitation of concrete structures. A variety of factors that affect the longevity of FRP composites are discussed: installation, quality control, material selection, and environmental conditions. Critical review of design approaches currently used in various international design guidelines is presented to identify potential opportunities for refinement of design guidance with respect to durability. Interdisciplinary approaches that combine materials science and structural engineering are recognized as having potential to develop composites with improved durability.

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Analysis of the nonlinear creep behavior of concrete/FRP-bonded assemblies

Cited by 45 publications

References 24 publications

Linear creep of bonded FRP-strengthened metallic structures at warm service temperatures

Linear creep of bonded FRP-strengthened metallic structures at warm service temperatures

Effect of the Cyclic Crack Opening-Closure during Epoxy-Curing Period of a CFRP Strengthening System Bonded on Concrete Substrate

Durability of Externally Bonded Fiber-Reinforced Polymer Composites in Concrete Structures: A Critical Review

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