Critical review of strength and durability of concrete beams externally bonded with FRP

Abid, Sallal R.; Al‐Lami, Karrar

doi:10.1080/23311916.2018.1525015

Cited by 34 publications

(22 citation statements)

References 88 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In their experimental research study, they tested eight large-scale RC beams in order to study and investigate the effects of different forms of FRP U-jacketing on debonding failure. Abid and Al-lami [20] conducted an extensive review of past research studies that emphasis the strength and durability of concrete beams that were externally bonded with FRP reinforcement. The focus of the research review was on the bond behavior, testing techniques, and models used to assess bond strength.…”

Section: Literature Reviewmentioning

confidence: 99%

Cracking Behavior of RC Beams Strengthened with Different Amounts and Layouts of CFRP

et al. 2019

View full text Add to dashboard Cite

The bending and shear behavior of RC beams strengthened with Carbon Fiber-Reinforced Polymers (CFRP) is the primary objective of this paper, which is focused on the failure mechanisms and on the moment-curvature response prior-to, and post, strengthening with different amounts and layouts of the CFRP reinforcement. Seven reinforced concrete beams were tested in 4-point bending, one without any CFRP reinforcement (control beam, Specimen C1), four with the same amount of CFRP in flexure but with different layouts of the reinforcement for shear (Specimens B1–B4), and two with extra reinforcement in bending, with and without reinforcement in shear (Specimens B6 and B5, respectively). During each test, the load and the mid-span deflection were monitored, as well as the crack pattern. The experimental results indicate that: (a) increasing the CFRP reinforcement above certain levels does not necessarily increase the bearing capacity; (b) the structural performance can be optimized through an appropriate combination of CFRP flexural and shear reinforcement; and (c) bond properties at the concrete–CFRP interface play a vital role, as the failure is very often triggered by the debonding of the CFRP strips. The experimental values were also verified analytically and a close agreement between the analytical and experimental values was achieved.

show abstract

Section: Literature Reviewmentioning

confidence: 99%

Cracking Behavior of RC Beams Strengthened with Different Amounts and Layouts of CFRP

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Abid and Lami [36] conducted an extensive review of past research works related to the strength and durability of concrete beams externally bonded with CFRP. A special focus was on the bond behavior, testing techniques and models used to assess bond strength.…”

Section: Literature Reviewmentioning

confidence: 99%

Flexural and Shear Strain Characteristics of Carbon Fiber Reinforced Polymer Composite Adhered to a Concrete Surface

Qureshi

Saleem

2018

Materials

View full text Add to dashboard Cite

The use of Fiber Reinforced Polymer (FRP) composites for strengthening concrete structures has gained a lot of popularity in the past couple of decades. The major issue in the retrofitting of concrete structures with FRP is the accurate evaluation of flexural and shear strains of polymer composites at the bonding interface of epoxy and concrete. To address it, a comprehensive experimental study was planned and carbon fiber reinforced polymer (CFRP) composite was applied on the concrete surface with the help of adhesives. CFRP was used as an external mounted flexural and shear reinforcement to strengthen the beams. Flexural load tests were performed on a group of eight reinforced concrete beams. These beams were strengthened in flexural and shear by different reinforcement ratios of CFRP. The strain gauges were applied on the surface of concrete and CFRP strips to assess the strain of both CFRP and concrete under flexural and shear stresses. The resulting test data is presented in the form of load–deformation and strain values. It was found that the values of strains transferred to the FRP through the concrete are highly dependent on the surface tensile properties of concrete and debonding strength of the adhesive. The test results clearly indicated that the strength increment in flexural members is highly dependent on strain values of the CFRP.

show abstract

“…The strengthening and retrofitting of existing concrete and masonry structures have attracted great attention in the last few decades. Fiber-reinforced polymer (FRP) composites have been largely used as an externally bonded reinforcement (EBR) of existing structural and non-structural concrete and masonry members due to their high mechanical properties, durability, and ease of installation [1][2][3][4]. Nonetheless, FRP EBR has some disadvantages mainly associated with the use of organic matrices (usually epoxy resins), which have poor performance at (relatively) high temperature (close to or higher than their glass transition temperature), produce toxic fumes if heated, cannot be applied to wet surfaces, and have poor physical-chemical compatibility with inorganic substrates.…”

Section: Introductionmentioning

confidence: 99%

Study of the Bond Capacity of FRCM- and SRG-Masonry Joints

2021

Self Cite

View full text Add to dashboard Cite

Fiber-reinforced cementitious matrix (FRCM) and steel-reinforced grout (SRG) have been increasingly applied as externally bonded reinforcement to masonry members in the last few years. Unlike fiber-reinforced polymer (FRP), FRCM and SRG have good performance when exposed to (relatively) high temperature and good compatibility with inorganic substrates, and they can be applied to wet surfaces and at (reasonably) low temperatures. Although numerous studies investigated the mechanical properties and bond performance of various FRCM and SRG, new composites have been developed recently, and their performance still needs to be assessed. In this study, the bond behavior of three FRCM composites and one SRG composite applied to a masonry substrate is investigated. Sixteen single-lap direct shear tests (four tests for each composite) are performed. The FRCM studied comprised one layer of carbon, PBO (polyparaphenylene benzobisoxazole), or alkali-resistant (AR)-glass bidirectional textile embedded within two cement-based matrices. The SRG composite comprised one layer of a unidirectional stainless-steel cord textile embedded within a lime-based matrix. The results show a peculiar bond behavior and failure mode for each composite. Based on these results, the behavior of the carbon and PBO FRCM is modeled solving the bond differential equation with a trilinear cohesive material law (CML).

show abstract

Critical review of strength and durability of concrete beams externally bonded with FRP

Cited by 34 publications

References 88 publications

Cracking Behavior of RC Beams Strengthened with Different Amounts and Layouts of CFRP

Cracking Behavior of RC Beams Strengthened with Different Amounts and Layouts of CFRP

Flexural and Shear Strain Characteristics of Carbon Fiber Reinforced Polymer Composite Adhered to a Concrete Surface

Study of the Bond Capacity of FRCM- and SRG-Masonry Joints

Contact Info

Product

Resources

About