Modeling Strategies of Finite Element Simulation of Reinforced Concrete Beams Strengthened with FRP: A Review

Naser, M.Z.; Hawileh, Rami A.; Abdalla, Jamal A.

doi:10.3390/jcs5010019

Cited by 60 publications

(31 citation statements)

References 56 publications

(67 reference statements)

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“…The spar uniaxial bar-like element is defined by two nodes with three degrees of freedom at each node which comprise of translations in the nodal x, y, and z directions. These reinforcing elements have the ability to simulate common nonlinear effects such as large deflection, plasticity, swelling, creep, and stress stiffening [11].…”

Section: Steel Reinforcementmentioning

confidence: 99%

“…Naser et al [11] is one among the most recent study which indicates that the beams of concrete structures need to have adequate tensile strength and stiffness capacity to resist blast loading. The study further explains that connections of the structural elements need to offer a significant support to maintain the structural system integrity to absorb the explosion forces without collapsing.…”

Section: Introductionmentioning

confidence: 99%

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The Research of Blast Resistant of Reinforcement Concrete Beams in Concrete Structures at Off-site Oil and Gas Plant

2021

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In the recent decades, blasts and gas explosions at the off-site of oil and gas plants have increased leading to destruction of important concrete structures, essential equipment and loss of human life. In response, structural engineers have come up with different ways of reinforcing beams of concrete structures using fiber reinforced polymers composite materials to produce blast resistant structures to minimize the impact of the blast loads, due to their unique and individual characteristics like high flexural and shear strength. This paper seeks to research the dynamic behavior, response and performance of reinforce concrete beams strengthened with Carbon Fiber Reinforced Polymer composites when subjected to blast loading. The study aims at proposing a design model of strengthening reinforce concrete beams with Carbon Fiber Reinforced Polymer in supporting concrete structures at off-site oil and gas plants against hydrocarbon explosions. Carbon Fiber Reinforced Polymer composites exhibit higher modulus of elasticity, higher energy absorption capacity, resistant to all forms of alkali and higher tensile strength compared to all other fiber reinforced polymers reinforcements and therefore the need to assess its capacity in protecting concrete structures at oil and gas plants against dynamic loads. The research will be carried out through numerical analysis using the finite element analysis computer program, ANSYS.

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Section: Steel Reinforcementmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Research of Blast Resistant of Reinforcement Concrete Beams in Concrete Structures at Off-site Oil and Gas Plant

2021

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“…Over the years many solutions have been proposed for the upgrading and repair of existing structures, spanning from the most traditional techniques and materials to the most modern and innovative ones, making use of composite materials, which are increasingly adopted not only for masonry structures, but also for reinforced concrete structures [38,39], even including some unconventional coupling [40,41].…”

Section: Introductionmentioning

confidence: 99%

New Frontiers of Composites Applications in Heritage Buildings: Repair of Exposed Masonry of St. Nicola Church in Pisa

Croce

2021

J. Compos. Sci.

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The upgrading and repair of masonry structures, which constitute a great part of built heritage, involve intricate aspects, in fact, the choice of the most suitable intervention technique is strongly dependent on its compatibility with superior preservation requirements. At present, beside more traditional approaches, many composite-based techniques are available, but, there are cases, such as exposed masonry, which are much more complicated to treat, since, to safeguard the original aspect, any intervention on the surface is precluded. In this paper, an innovative repair technique is discussed. The proposed method, highly adaptable and suitable for general application, is based on the insertion of a composite fabric into the mortar joints of the exposed masonry, partly relying on the indent repair technique traditionally used for the repair of masonry structures. Due to the peculiarities of the approach, the feasibility and efficiency of the solution cannot be demonstrated through application in the testing laboratory or on reduced samples, it was, therefore, necessary to identify a relevant case study for a field testing. After careful evaluation, duly considering the risks from the esthetic point of view, the proposed solution was implemented to repair the exposed masonry of the main façade and of the rear façade of the medieval San Nicola Church in Pisa, which is an outstanding example of the Pisan-Romanesque style. Thanks to a careful definition of the operational phases and to skilled workmanship, the solution was easily implemented in the year 2005, fully safeguarding the aesthetics of the façades, so demonstrating its feasibility. However, this successful outcome was only a first proof of the validity of the experiment, which also needed, for complete validation, the assessment of its efficiency over time. Only recently, after more than 15 years, it has been possible to ascertain that the intervention is still effective, because the crack patterns are stabilized and no reopening of the crack has occurred in the meantime, so achieving full confirmation.

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“…Plate-end debonding is a very common failure mode of the strengthened beams under loading, and therefore, it has become one of the most fundamental research topics in the past few decades. Numerous experimental (Deng and Lee, 2007; Lenwari et al, 2006; Rizkalla et al, 2008; Yu et al, 2011; Zeng et al, 2018) and theoretical studies (De Lorenzis and Zavarise, 2009; De Lorenzis et al, 2013; Haghani et al, 2009; Naser et al, 2021; Schnerch et al, 2007; Smith and Teng, 2001; Stratford and Cadei, 2006; Teng et al, 2002, 2015) have investigated the plate-end debonding failure in the FRP-strengthened beams at ambient temperature. The existing studies have demonstrated that high interfacial shear and peeling stresses at the plate end contribute to the plate-end debonding failure.…”

Section: Introductionmentioning

confidence: 99%

Effect of temperature variation on the plate-end debonding of FRP-strengthened beams: A theoretical study

Dong

Gao

Fernando

2021

Advances in Structural Engineering

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Steel/concrete structures strengthened with externally bonded FRP plates may be subjected to significant temperature variations during their service time. Such temperature variation (i.e., thermal loading) may significantly influence the debonding mechanism in FRP-strengthened structures due to the thermal incompatibility between the FRP plate and the substrate as well as the temperature-induced bond degradation at the FRP-to-steel/concrete interface. However, limited information is available on the effect of temperature variation on the debonding failure in FRP-strengthened beams. This paper presents a new and closed-form solution to investigate the plate-end debonding failure of the FRP-strengthened beam subjected to combined thermal and mechanical (i.e., flexural) loading. A bilinear bond-slip model is used to describe the bond behavior of the FRP-to-substrate interface. The analytical solution is validated through comparisons with finite element analysis results regarding the distributions of the interfacial shear stresses, the interfacial slips and the axial stresses of the FRP plate. Given that a constant bond-slip relationship is adopted, it is observed that an increase in service temperature will lead to an increased interfacial slip at the plate end and consequently a reduced plate-end debonding load, and vice versa. Further parametric studies have indicated that the thermal loading effects become more significant when shorter and stiffer FRP plates are applied for strengthening.

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Modeling Strategies of Finite Element Simulation of Reinforced Concrete Beams Strengthened with FRP: A Review

Cited by 60 publications

References 56 publications

The Research of Blast Resistant of Reinforcement Concrete Beams in Concrete Structures at Off-site Oil and Gas Plant

The Research of Blast Resistant of Reinforcement Concrete Beams in Concrete Structures at Off-site Oil and Gas Plant

New Frontiers of Composites Applications in Heritage Buildings: Repair of Exposed Masonry of St. Nicola Church in Pisa

Effect of temperature variation on the plate-end debonding of FRP-strengthened beams: A theoretical study

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