Cracking control comparison in the specifications of serviceability in cracking for FRP reinforced concrete beams

Ju, Man Ki; Park, YoungHwan; Park, Cheolwoo

doi:10.1016/j.compstruct.2017.09.016

Cited by 33 publications

(11 citation statements)

References 10 publications

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“…In this regard, an endeavor has been made to examine the performance of concrete after healing of cracks. It is well known that the addition of fiber reduces the crack width and also the number of cracks in concrete by virtue of bridging action [24,25]. Hence, in this study basalt fibers have been used due to its eco-friendliness and high tensile strength.…”

Section: Introductionmentioning

confidence: 99%

Self-repairing of concrete cracks by using bacteria and basalt fiber

Vijay

Murmu

2019

SN Appl. Sci.

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Concrete is a most extensively used material in construction; however, cracks in concrete are unavoidable. There is a new technology that can heal the cracks by precipitated calcium carbonate called as microbial self-healing concrete which reduces the coefficient of permeability. The self-healing/self-repairing concrete with the addition of fibers can be used in construction industries to enhance the strength and durability of concrete. Fibers may reduce the crack width by bridging action and bacteria develop a filling material in that bridge portion. This improves the durability and strength of bacterial concrete. In the present study, four different mixes are prepared, namely normal concrete, bacterial concrete, fiber-reinforced concrete, and bacterial concrete, with the addition of fibers. The healing/repairing efficiency of concrete is measured in terms of electrical resistivity and compressive strength of concrete on pre-cracked samples and healed samples. Further, the results are correlated with the scanning electron microscope and energy-dispersive X-ray spectrometer analysis. The results and analysis that carried out show substantial enhancement in the durability and strength of concrete with the addition of fibers in bacterial concrete.

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Section: Introductionmentioning

confidence: 99%

Self-repairing of concrete cracks by using bacteria and basalt fiber

Vijay

Murmu

2019

SN Appl. Sci.

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“…FRP bars have been widely considered as substitutes for the reinforcement of steel bars in previous RC structures due to advantages such as their high resistance to electrochemical corrosion, high strength-weight ratio, and lightness [2,3,4,5]. However, rather than their strength, the lower flexural stiffness of FRP bars, compared to steel bars, is a more significant problem with respect to serviceability in terms of deflection and crack width [6]. There have been efforts to investigate the structural capacity of two-way concrete slabs reinforced with FRP bars.…”

Section: Introductionmentioning

confidence: 99%

Punching Shear Behavior of Two-Way Concrete Slabs Reinforced with Glass-Fiber-Reinforced Polymer (GFRP) Bars

Park

2018

Polymers

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This study investigated the punching shear behavior of full-scale, two-way concrete slabs reinforced with glass fiber reinforced polymer (GFRP) bars, which are known as noncorrosive reinforcement. The relatively low modulus of elasticity of GFRP bars affects the large deflection of flexural members, however, applying these to two-way concrete slabs can compensate the weakness of the flexural stiffness due to an arching action with supporting girders. The test results demonstrated that the two-way concrete slabs with GFRP bars satisfied the allowable deflection and crack width under the service load specified by the design specification even in the state of the minimum reinforcement ratio. Previous predicting equations and design equations largely overestimated the measured punching shear strength when the slab was supported by reinforced concrete (RC) girders. The strength difference can be explained by the fact that the flexural behavior of the supporting RC beam girders reduces the punching shear strength because of the additional deflection of RC beam girders. Therefore, for more realistic estimations of the punching shear strength of two-way concrete slabs with GFRP bars, the boundary conditions of the concrete slabs should be carefully considered. This is because the stiffness degradation of supporting RC beam girders may influence the punching shear strength.

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“…The use of fiber reinforced polymer (FRP) composite has gained considerable interest and growing acceptance as internal [1][2][3][4][5][6][7][8][9][10][11][12] and external reinforcement [13][14][15][16][17][18][19][20] in concrete structures. FRP bars have a high strength-to-weight ratio but low elastic modulus and linear deformation until rupture, leading to brittle failure, larger deflections and crack widths compared with steel reinforced concrete structures.…”

Section: Introductionmentioning

confidence: 99%

“…FRP bars have a high strength-to-weight ratio but low elastic modulus and linear deformation until rupture, leading to brittle failure, larger deflections and crack widths compared with steel reinforced concrete structures. Therefore, serviceability limit state is generally controlling the design of FRP reinforced concrete structures [6][7][8][9][10][11][12] . Hybrid reinforced concrete structures [21][22][23][24][25][26][27][28] , where FRP reinforcement located closer to the external environment and steel bars embedded in concrete with largest possible cover, combine the advantage of ductility and durability of steel or FRP reinforced concrete structures.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on flexural behavior of ECC-concrete composite beams reinforced with FRP bars

Ashour

Cao

et al. 2019

Composite Structures

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This paper presents test results of fifteen reinforced engineered cementitious composite (ECC)-concrete beams. The main parameters investigated were the amount and type of reinforcement, and ECC thickness. All reinforced ECC-concrete composite beams tested were classified into four groups according to the amount and type of main longitudinal reinforcement used; three groups were reinforced with FRP, steel and hybrid FRP/steel bars, respectively, having similar tensile capacity, whereas the fourth group had a larger amount of only FRP reinforcement. In each group, four height replacement ratios of ECC to concrete were studied. The test results showed that the moment capacity and stiffness of concrete beams are improved and the crack width can be well controlled when a concrete layer in the tension zone is replaced with an ECC layer of the same thickness. However, the improvement level of ECC-concrete composite beams was controlled by the type and amount of reinforcement used. Based on the simplified constitutive relationships of materials and plane section assumption, three failure modes and their discriminate formulas are developed. Furthermore, simplified formulas for moment capacity calculations are proposed, predicting good agreement with experimental results.

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Cracking control comparison in the specifications of serviceability in cracking for FRP reinforced concrete beams

Cited by 33 publications

References 10 publications

Self-repairing of concrete cracks by using bacteria and basalt fiber

Self-repairing of concrete cracks by using bacteria and basalt fiber

Punching Shear Behavior of Two-Way Concrete Slabs Reinforced with Glass-Fiber-Reinforced Polymer (GFRP) Bars

Experimental study on flexural behavior of ECC-concrete composite beams reinforced with FRP bars

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