Uniaxial Tension Behavior of Reinforced Concrete Members Strengthened with Carbon Fiber Sheets

Farah, Khalid; Sato, Yashuhiko

doi:10.1061/(asce)cc.1943-5614.0000175

Cited by 12 publications

(16 citation statements)

References 7 publications

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“…It has been observed by several researchers that the presence of the externally bonded FRP typically alters the crack patterns and bond condition of the member under uniaxial tensile load, which leads to the change of the main characteristics of the stress -strain relationships of concrete and steel reinforcements (Ueda et al 2002;Ceroni et al 2004;Farah and Sato 2011). In this paper, these stress -strain relationships were studied by testing thirteen full-scale FRP RC prismatic specimens.…”

Section: Introductionmentioning

confidence: 99%

Uniaxial Tensile Stress-Strain Relationships of RC Elements Strengthened with FRP Sheets

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Section: Introductionmentioning

confidence: 99%

Uniaxial Tensile Stress-Strain Relationships of RC Elements Strengthened with FRP Sheets

et al. 2016

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“…Compared to the large numbers of experimental results on FRP strengthened RC elements which aim at studying the behavior at the ultimate stage, fewer results are available for verification of serviceability conditions under direct tension [1,[3][4][5][6][7][8][9][10]. Moreover, increase in the ultimate capacity due to FRP strengthening will not necessarily result in a proportional increase in the service load [1]; therefore, verification of serviceability limit state in FRP strengthened RC elements is crucial.…”

Section: Introductionmentioning

confidence: 99%

“…A number of experimental tests have been conducted to evaluate the cracking of FRP strengthened RC flexural elements [11][12][13]. However, the behavior of FRP strengthened RC members under direct tension was the focus of few research studies [3][4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

“…However, for RC members strengthened by externally bonded FRP, the serviceability in terms of crack characteristics has not been well established; in this case further studies are needed regarding the transfer of stresses at the concrete-FRP interface, and also the interaction of the external reinforcement with internal steel. Limited research studies have investigated the crack characteristics and tension stiffening of externally bonded FRP strengthened prisms and beams [1,[3][4][5][6][7][8][9][10]. Some design provisions provide equations for calculating crack width and spacing for RC elements at serviceability conditions [16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, average crack widths are generally smaller than for unstrengthened members at the same smeared strain level, due to the additional tension stiffening of the external FRP reinforcement developing at the FRP-concrete interface which reduces the crack spacing [3][4][5][6][7][8][9][10]. This paper presents and discusses the experimental results of FRP strengthened RC members tested under uniaxial tension.…”

Section: Introductionmentioning

confidence: 99%

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Cracking behavior and crack width predictions of FRP strengthened RC members under tension

Zomorodian

Yang

Belarbi

et al. 2016

Engineering Structures

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This is the accepted version of the paper.This version of the publication may differ from the final published version. Permanent repository link CRACKING BEHAVIOR AND CRACK WIDTH PREDICTIONS OF FRP STRENGTHENED RC MEMBERS UNDER TENSION AbstractThis paper presents and discusses the experimental results of uniaxial tensile tests of fiber reinforced polymer externally strengthened reinforced concrete (FRP strengthened RC) prisms in terms of crack width and crack spacing. As a non-contact and material independent system for in-time measurement of displacement and strain, the digital image correlation (DIC) technique has been used in this study for investigating the evolution of strains and formation of cracks during uniaxial tensile tests. As a result, the cracks were measured precisely at any load stage.The experimental results of tests performed by authors and other researchers on FRP strengthened RC members in tension are compared to prediction models from code provisions and guidelines (Eurocode 2 and fib 14), and their suitability are analyzed and discussed. The results show the dependence of the behavior and crack characteristics of FRP strengthened RC members to parameters such as wrapping scheme and FRP reinforcement ratios which are not included in design provisions for crack analysis. A new formulation for crack width and spacing for FRP strengthened RC members, calibrated using the experimental results, has been proposed which considers all the main affecting parameters.

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Coupled Hydraulic System for Tensile Testing in Compression-only Machines

et al. 2016

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Fracture theory for normal strength concrete has thoroughly been studied over the past decades. Through indirect and direct tensile testing techniques, the postpeak softening response of conventional concrete has been established and utilized in analysis and design. However, for more recently developed concrete materials (e.g. fiber reinforced, high performance) under complex loading conditions, the required fracture properties to predict response are extremely limited. Considering this lack of knowledge, the objective of this research was to develop a uni-axial tensile testing technique to attain the post-peak softening response for ultra-high performance concrete for ultimate use in conjunction with an applied confining pressure system. Specifically, this research was conducted for implementation into an existing, large compression-only machine at the US Army Engineer Research and Development Center (ERDC). The new methodology enabled the existing testing frame to apply a stiffening force, while an external hydraulic plunger cylinder performed the tensile test. The scheme enables tensile testing under confining pressures in the compression-only machine.

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Uniaxial Tension Behavior of Reinforced Concrete Members Strengthened with Carbon Fiber Sheets

Cited by 12 publications

References 7 publications

Uniaxial Tensile Stress-Strain Relationships of RC Elements Strengthened with FRP Sheets

Uniaxial Tensile Stress-Strain Relationships of RC Elements Strengthened with FRP Sheets

Cracking behavior and crack width predictions of FRP strengthened RC members under tension

Coupled Hydraulic System for Tensile Testing in Compression-only Machines

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