Experimental Investigation of the Capacity of Steel Fibers to Ensure the Structural Integrity of Reinforced Concrete Specimens Coated with CFRP Sheets

Gribniak, Viktor; Arnautov, A. K.; Norkus, Arnoldas; Tamulenas, Vytautas; Gudonis, Eugenijus; Соколов, А. А.

doi:10.1007/s11029-016-9592-1

Cited by 12 publications

(16 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure 9 illustrates the role of mechanical fastening on the failure of external reinforcement system. In accord with the previous research findings [20], the specimens with pure adhesive bonding of CFRP sheets failed in a brittle manner upon sudden debonding of the external reinforcement (Figure 9a). Due to the different stiffness and strength of the adhesive, signs of local delamination were observed within the damaged bond area after testing, as exemplified by the beam III-B2-F-C.…”

Section: Ii-b2-f-csupporting

confidence: 91%

“…the middle two layers of CFRP sheet was oriented at +45 • and −45 • from the top and bottom layers. Such lay-up configuration in the boundary zones could avoid local failure of the external sheets [20]. More detailed descriptions of the fastening procedures were contained elsewhere [29].…”

Section: Series I Ii Iiimentioning

confidence: 99%

“…Steel fibre-reinforced concrete has been applied in multiple infrastructure projects such as vehicular and metro tunnel linings for improved resilience [17][18][19]. The fibres, moreover, can increase the damage resistance of the strengthening systems [20,21]. In practice, partial reconstruction can be done, by underpinning and replacing part of the existing concrete with newly cast steel fibre-reinforced concrete, such process also offers the opportunity of replacing the steel reinforcing bars with fibre-reinforced polymer (FRP) bars.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Strengthening of Fibre Reinforced Concrete Elements: Synergy of the Fibres and External Sheet

Gribniak

Tamulenas

et al. 2019

Sustainability

View full text Add to dashboard Cite

In structural rehabilitation and strengthening, the structural members are often required to cope with larger design loading due to the upgrading of building services and design standard, while maintaining the member size to preserve the architectural dimensions and headroom. Moreover, durability enhancement by mitigating or eliminating the reinforcement corrosion problem is often desired. Concrete cracking is a major initiating and accelerating factor of the corrosion of steel reinforcement. The application of fibres is a prominent solution to the cracking problem. Furthermore, the fibres can increase the mechanical resistance of the strengthening systems. This study reveals the synergy effect of the combined application of steel fibres and external carbon fibre-reinforced polymer (CFRP) sheets. The investigation encompasses the use of fibre-reinforced polymer (FRP) reinforcing bars, discrete steel fibres, externally bonded and mechanically fastened FRP sheets in different combinations. It is discovered that the steel fibres can help to control concrete cracking and eventually alter the failure mode and enhance the flexural resistance. The FRP reinforcement system, together with the steel fibres, radically resolves the structural safety problem caused by corrosion of the steel bar reinforcement. Finally, the impact of the external sheet on the fire limit state performance needs to be resolved, such as by adopting fire protection rendering for the finishes layer.

show abstract

Section: Ii-b2-f-csupporting

confidence: 91%

Section: Series I Ii Iiimentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Strengthening of Fibre Reinforced Concrete Elements: Synergy of the Fibres and External Sheet

Gribniak

Tamulenas

et al. 2019

Sustainability

View full text Add to dashboard Cite

show abstract

“…Hence, the behavior of composite members of SFRC bonded with external CFRP sheet warrants dedicated research. In previous experimental investigations [ 21 , 22 , 23 ], it has been revealed that the application of steel fibers altered the failure character and thus increased the load-carrying capacity of RC flexural members externally bonded with CFRP sheets. While the RC beams tended to fail by splitting of the concrete cover at the level of longitudinal reinforcement, the SFRC beams tended to fail by debonding at the interface between the concrete and the adhesive.…”

Section: Introductionmentioning

confidence: 99%

“…By altering the failure character, the load-carrying capacity of SFRC beams could be increased by almost 25% (though the failure remained brittle). Besides, the CFRP sheet effectively increased the number of cracks and the energy dissipation capability of composite beam specimens before the ultimate failure [ 23 ].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Behavior of Steel Fiber-Reinforced Concrete Beams Bonded with External Carbon Fiber Sheets

Gribniak

Tamulenas

et al. 2017

Materials

View full text Add to dashboard Cite

This study investigates the mechanical behavior of steel fiber-reinforced concrete (SFRC) beams internally reinforced with steel bars and externally bonded with carbon fiber-reinforced polymer (CFRP) sheets fixed by adhesive and hybrid jointing techniques. In particular, attention is paid to the load resistance and failure modes of composite beams. The steel fibers were used to avoiding the rip-off failure of the concrete cover. The CFRP sheets were fixed to the concrete surface by epoxy adhesive as well as combined with various configurations of small-diameter steel pins for mechanical fastening to form a hybrid connection. Such hybrid jointing techniques were found to be particularly advantageous in avoiding brittle debonding failure, by promoting progressive failure within the hybrid joints. The use of CFRP sheets was also effective in suppressing the localization of the discrete cracks. The development of the crack pattern was monitored using the digital image correlation method. As revealed from the image analyses, with an appropriate layout of the steel pins, brittle failure of the concrete-carbon fiber interface could be effectively prevented. Inverse analysis of the moment-curvature diagrams was conducted, and it was found that a simplified tension-stiffening model with a constant residual stress level at 90% of the strength of the SFRC is adequate for numerically simulating the deformation behavior of beams up to the debonding of the CFRP sheets.

show abstract

A Novel Technique for Strengthening Reinforced Concrete Shear-Deficient Members Using Fiber-Reinforced Polymer Rope as Near Surface Mounted Reinforcement

Kytinou,

Gribniak,

Golias

et al. 2024

Structural Integrity

View full text Add to dashboard Cite

Experimental Investigation of the Capacity of Steel Fibers to Ensure the Structural Integrity of Reinforced Concrete Specimens Coated with CFRP Sheets

Cited by 12 publications

References 11 publications

Strengthening of Fibre Reinforced Concrete Elements: Synergy of the Fibres and External Sheet

Strengthening of Fibre Reinforced Concrete Elements: Synergy of the Fibres and External Sheet

Mechanical Behavior of Steel Fiber-Reinforced Concrete Beams Bonded with External Carbon Fiber Sheets

A Novel Technique for Strengthening Reinforced Concrete Shear-Deficient Members Using Fiber-Reinforced Polymer Rope as Near Surface Mounted Reinforcement

Contact Info

Product

Resources

About