cfrp laminates for shear strengthening of concrete beams

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CFRP Laminates for Shear Strengthening of Concrete Beams

Aug 26, 2019  CFRP Laminates for Shear Strengthening of RC Beams. The use of Carbon fiber reinforced polymer (CFRP) strips for shear strengthening of reinforced concrete beam has gain great success. Structural beams may loss shear capacity due to environmental influences or design and construction errors and hence rehabilitation of the such beam is a must.

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Near surface mounted CFRP laminates for shear ...

Mar 01, 2006  A Near Surface Mounted (NSM) strengthening technique was developed to increase the shear resistance of concrete beams. The NSM technique is based on fixing, by epoxy adhesive, Carbon Fiber Reinforced Polymer (CFRP) laminates into pre-cut slits opened in the concrete cover of lateral surfaces of the beams.

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1 NEAR SURFACE MOUNTED CFRP LAMINATES FOR SHEAR ...

2 1 KEYWORDS: Carbon Fiber Reinforced Polymers, Concrete, Steel stirrups, Shear strengthening, Shear failure, Near 2 Surface Mounted (NSM) 3 4 1. INTRODUCTION 5 To increase the shear resistance of concrete beams, sheets and laminates of carbon fiber reinforced polymers 6 (CFRP) are generally applied on the faces of the elements to be strengthened, using an externally bonded reinforcing

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Shear Strengthening of Reinforced Concrete Beams Using ...

Apr 02, 2005  The CFRP system can significantly increase the serviceability, ductility, and ultimate shear strength of a concrete beam; thus, restoring beam shear strength by using CFRP is a highly effective technique. An analysis and design method for shear strengthening of externally bonded CFRP

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Reinforced concrete beams strengthened with CFRP laminates ...

CFRP laminates are frequently used for bending and shear strengthening of reinforced concrete beams and their bonding is guaranteed by using epoxy based resins. In order to ensure good laminate bonding, the concrete surface must be prepared through the action of water jets or needle scalers.

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NSM CFRP laminates for the shear strengthening of high ...

technique with CFRP laminates. The results showed that NSM shear strengthening technique with CFRP laminates has a high performance in RC beams with high-strength concrete, not only in terms of increasing the load carrying capacity of the beams but also in mobilizing more effectively the tensile properties of the CFRP. 1.

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1 NEAR SURFACE MOUNTED CFRP LAMINATES FOR SHEAR ...

2 1 KEYWORDS: Carbon Fiber Reinforced Polymers, Concrete, Steel stirrups, Shear strengthening, Shear failure, Near 2 Surface Mounted (NSM) 3 4 1. INTRODUCTION 5 To increase the shear resistance of concrete beams, sheets and laminates of carbon fiber reinforced polymers 6 (CFRP) are generally applied on the faces of the elements to be strengthened, using an externally bonded reinforcing

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Reinforced concrete beams strengthened with CFRP

CFRP laminates are frequently used for bending and shear strengthening of reinforced concrete beams and their bonding is guaranteed by using epoxy based resins. In order to ensure good laminate bonding, the concrete surface must be prepared through the action of water jets or needle scalers.

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(PDF) Strengthening of Concrete Beams with CFRP Laminates

PDF On Oct 1, 2010, K. Pilakoutas and others published Strengthening of Concrete Beams with CFRP Laminates Find, read and cite all the research you need on ResearchGate

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CFRP shear strengthening of reinforced concrete beams in ...

Feb 15, 2017  Fig. 2 shows the CFRP wrapping configuration for Groups 1, 2 and 3 which have a 28-day concrete cube compressive strength of 34.0, 38.0 and 37.5 MPa, respectively.The 0.12 mm thick CFRP sheets have a 65 GPa elastic modulus and 894 MPa nominal tensile strength.Furthermore, Group 3 beams were strengthened in flexure using an additional near surface mounted (NSM) No. 16 Glass

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Flexural and shear strengthening of reinforced concrete ...

Jan 15, 2021  The hybrid solution using CFRP for the strengthening of RC beams that consists on the flexural strengthening with NSM CFRP laminates, on the shear strengthening with discrete strips of EBR U-shape CFRP wet lay-up sheets, complemented with an anchorage system at the extremities of the CFRP shear strengthening proved to be easy and quick to apply.

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Reinforced concrete beams strengthened in shear with NSM ...

3.1 General behavior of a RC beam shear strengthening with NSM CFRP laminates and the effect of pre-craks Fig. 3a shows the typical relationship between the applied load and the deflection of the loaded section, F-u, for a RC beam shear strengthened with NSM CFRP laminates and for the corresponding reference beam.

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Shear strengthening of reinforced concrete beam using ...

Feb 20, 2018  For shear strengthening of reinforced concrete beams with NFRP laminates, a total of eight identical reinforced concrete beam specimens each with dimension of 2300 mm long, 150 mm wide, and 300 mm deep were fabricated and tested. The details of all beam specimens are summarized in Table 3. Beam CB was left as unstrengthened control specimen.

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Shear Strengthening of Reinforced Concrete Beam - an ...

Lees et al. (2002) proposed a system which used carbon fibre reinforced thermoplastic tape straps as external post tensioned shear reinforcement for concrete. The tape was thin (typically between 0.12 and 0.16 mm thick) and was composed of high strength carbon fibres oriented in the longitudinal direction.It was shown that a concrete beam strengthened with CFRP straps exhibited a significantly ...

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Shear Strengthening of Reinforced Concrete T-Beams with ...

Abstract Strengthening of existing reinforced concrete (RC) structures by externally bonding carbon fiber–reinforced polymers (CFRP) applied to the concrete substrate has proven to be effective in ...

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(PDF) Behavior of Reinforced Concrete Beams Strengthened ...

The results revealed that the proposed strengthening method is suitable for repairing severely damaged reinforced concrete beams. Toutanji et al. [15] tested seven reinforced concrete beams externally strengthened with three to six layers of CFRP sheets via an organic epoxy, in addition to a control unstrengthend specimen.

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Flexural Strengthening of Reinforced Concrete Beams Using ...

CFRP laminates without mechanical anchorage. Submitted to Construction Building Materials. Paper II Yang J., Haghani R., Al-Emrani M., and Johansson M. (2018). Innovative flexural strengthening of RC beams using self-anchored prestressed CFRP laminates: experimental and numerical investigations. To

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Carbon-fiber-reinforced polymers - Wikipedia

Specialist ultra-high modulus CFRP (with tensile modulus of 420 GPa or more) is one of the few practical methods of strengthening cast-iron beams. In typical use, it is bonded to the tensile flange of the section, both increasing the stiffness of the section and lowering the neutral axis , thus greatly reducing the maximum tensile stress in the ...

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Numerical Analysis of Reinforced Concrete Beam ...

The behaviour of reinforced concrete beam strengthened with Carbon Fiber Reinforced Polymer (CFRP) and Glass fiber reinforced polymer GFRP laminates was investigated using finite element models and the results are presented in this paper. The numerical investigation assessed the effect of the configuration of FRP strengthening laminates on the behaviour of concrete beams.

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NSM CFRP laminates for the shear strengthening of high ...

technique with CFRP laminates. The results showed that NSM shear strengthening technique with CFRP laminates has a high performance in RC beams with high-strength concrete, not only in terms of increasing the load carrying capacity of the beams but also in mobilizing more effectively the tensile properties of the CFRP. 1.

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1 NEAR SURFACE MOUNTED CFRP LAMINATES FOR SHEAR ...

2 1 KEYWORDS: Carbon Fiber Reinforced Polymers, Concrete, Steel stirrups, Shear strengthening, Shear failure, Near 2 Surface Mounted (NSM) 3 4 1. INTRODUCTION 5 To increase the shear resistance of concrete beams, sheets and laminates of carbon fiber reinforced polymers 6 (CFRP) are generally applied on the faces of the elements to be strengthened, using an externally bonded reinforcing

Get Price

Near surface mounted CFRP laminates for shear ...

A Near Surface Mounted (NSM) strengthening technique was developed to increase the shear resistance of concrete beams. The NSM technique is based on fixing, by epoxy adhesive, Carbon Fiber Reinforced Polymer (CFRP) laminates into pre-cut slits opened in the concrete cover of lateral surfaces of the beams.

Get Price

(PDF) SHEAR STRENGTHENING OF REINFORCED CONCRETE BEAMS ...

shear strengthening of reinforced concrete beams using cfrp laminates August 2008 Conference: PCI 2008 National Bridge Conference PCI NBC 2008 Orlando, Florida October 5 - 7, 2008

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NEW SHEAR STRENGTHENING CONFIGURATIONS OF NSM

7 polymer (CFRP) laminates for the shear strengthening of reinforced concrete (RC) beams has been 8 demonstrated during the last decade. Analytical and numerical research indicate that this technique 9 can be more effective if the CFRP laminates are installed deeper into the slits. However, the depth

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Strengthening of reinforced concrete beams using CFRP ...

The CFRP system can significantly increase the serviceability, ductility, and ultimate shear strength of a concrete beam; thus, restoring beam shear strength by using CFRP is a highly effective ...

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Research Paper SHEAR STRENGTHENING OF DIFFERENT

experimental study on shear strengthening of reinforced concrete beams with CFRP strip laminates. This paper represents two series (series A and series B) of beam that were tested. Each series is constituted by a beam without any shear reinforcement and a beam with steel stirrups, strips of CFRP

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Shear Strengthening of Reinforced Concrete Beams with ...

16 two inclinations of the CFRP laminate (45º and 90º). 17 This experimental program aims to compare the effectiveness of these shear strengthening techniques, as well as the 18 influence of the inclination of the CFRP laminates in the HCPs for the shear strengthening of RC beams. 19 The characteristics of the beams are presented in Table 1 ...

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Study On The Behaviour Of Reinforced Concrete Beams Using ...

RC beams. The properties of CFRP laminates is shown in Table 1. Adhesive used for bonding CFRP laminates to RC beams is Nitowrap 40. The compression of adhesive Nitowrap 40 is 40N/mm2 at 1 day and 75 N/mm2 at 7days, shear strength was 13 N/mm2. The mix ratio of adhesive agent of base and harderner is 2:1 and the pot life of mix is 30 min.

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(PDF) Behavior of Reinforced Concrete Beams Strengthened ...

The results revealed that the proposed strengthening method is suitable for repairing severely damaged reinforced concrete beams. Toutanji et al. [15] tested seven reinforced concrete beams externally strengthened with three to six layers of CFRP sheets via an organic epoxy, in addition to a control unstrengthend specimen.

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Numerical Analysis of Reinforced Concrete Beam ...

The behaviour of reinforced concrete beam strengthened with Carbon Fiber Reinforced Polymer (CFRP) and Glass fiber reinforced polymer GFRP laminates was investigated using finite element models and the results are presented in this paper. The numerical investigation assessed the effect of the configuration of FRP strengthening laminates on the behaviour of concrete beams.

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Flexural strengthening of concrete beams with CFRP - Rhino

A.F Ashour, “Flexural strengthening of RC continuous beams using CFRP laminates,” Cement and Concrete Composites, pp. 765-775, 2004. CI440, Guide for the Design and Construction of Externally Bonded FRP Systems for Strengthening Concrete Structures, Michigan, USA: American Concrete

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Shear Strengthening of Reinforced Concrete T-Beams with ...

Abstract Strengthening of existing reinforced concrete (RC) structures by externally bonding carbon fiber–reinforced polymers (CFRP) applied to the concrete substrate has proven to be effective in ...

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Shear Strengthening of RC Beams with Near-Surface

Shear Strengthening of RC Beams with Near-Surface-Mounted CFRP Laminates by S. Dias and J. Barros Synopsis: The efficacies of the Near Surface Mounted (NSM) and Externally Bonded Reinforcing (EBR) techniques for the shear strengthening of rectangular cross section RC beams are compared. Both techniques are based on the use of carbon fiber

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