Experimental determination of FRP–concrete cohesive interface properties under fatigue loading

Carloni, Christian; Subramaniam, Kolluru V. L.; Savoia, Marco; Mazzotti, Claudio

doi:10.1016/j.compstruct.2011.10.026

Cited by 114 publications

(54 citation statements)

References 28 publications

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“…1 (a) and Fig. 1(d), are the most commonly used test methods among researchers because of their simplicity [4,[37][38][39][40][41][42]. However, the state of stress in the concrete in each of these two test methods can be expected to be quite different.…”

Section: Testing Methods and Configurations For Concrete Substratesmentioning

confidence: 99%

“…This method was implemented in various researches [4,14,24,27,30,37,46,[53][54][55][56][57][58][59][60].…”

Section: Testing Methods and Configurations For Concrete Substratesmentioning

confidence: 99%

“…Loading type: monotonic/cyclic and static/dynamic; including the effects of seismic, fatigue, blast, etc. [4][5][6]; V. Environmental conditions: temperature [7,8], frosting and Freeze-thaw [9], humidity [10], and pollution Shadravan et al (2007) hypothesized that the testing method and setup in experimental studies changes the way that loading conditions and the fracture mechanism are modeled in the study, and thus, affects the interpretation of results. This paper reviews available testing procedures and configurations and proposes a new method for direct shear testing method [11].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Review of Direct Shear Testing Configurations for Bond between Fiber-Reinforced Polymer Sheets on Concrete and Masonry Substrates

Shadravan

Tehrani

2017

Period. Polytech. Civil Eng.

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The surface bond characteristics of Fiber-Reinforced Polymer (FRP) IntroductionApplication of surface-bonded fiber-reinforced polymer (FRP) sheets is an attractive retrofit technique to achieve deformation control and improved strength in brittle masonry and concrete vertical and horizontal structural members.The surface bond characteristics of FRP sheets have been a topic of research in last decades. The sheets exhibit brittle performance and often delaminate prematurely before they attain the full strength of materials.Based et al. (2007) hypothesized that the testing method and setup in experimental studies changes the way that loading conditions and the fracture mechanism are modeled in the study, and thus, affects the interpretation of results. This paper reviews available testing procedures and configurations and proposes a new method for direct shear testing method [11].

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Section: Testing Methods and Configurations For Concrete Substratesmentioning

confidence: 99%

“…This method was implemented in various researches [4,14,24,27,30,37,46,[53][54][55][56][57][58][59][60].…”

Section: Testing Methods and Configurations For Concrete Substratesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A Review of Direct Shear Testing Configurations for Bond between Fiber-Reinforced Polymer Sheets on Concrete and Masonry Substrates

Shadravan

Tehrani

2017

Period. Polytech. Civil Eng.

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“…According to other authors, the evaluation cannot but be purely experimental. Measuring the strain profile in the stiffener -usually employing resistance strain gages -the effective bond length is the length over which the strain decays from the maximum to the zero value (Ali-Ahmad et al, 2006;Bizindavyi and Neale, 1999;Carloni and Subramaniam, 2010;Carloni et al, 2012;Kamel et al, 2004;Subramaniam et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Cohesive debonding of a stiffener from an elastic substrate

Franco

Royer-Carfagni

2014

Composite Structures

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To strengthen concrete or masonry, a modern technique uses adherent strips made of Fiber Reinforced Polymer (FRP). A model problem for this is here considered, represented by an elastic stiffener pulled at one end, in adhesive contact with an elastic half space in generalized plane stress. An analytical solution is developed under the hypothesisà la Baranblatt that cohesive adhesion forces remain active between the two materials when relative slip occurs (provided this is less than a critical value), so that the stress singularity predicted by the theory of elasticity in the case of perfect bonding is removed. We find that the bond length beyond which no further increase of strength could be achieved, referred to as the effective bond length, coincides in practice with the ultimate length of the cohesive zone, i.e., its maximal extension prior that the critical slip limit is attained. The debonding process in a pull-out experiment is analyzed in detail. Results are in better agreement with experimental data than those obtainable with traditional models, which neglect as a rule the deformation of the substrate.

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“…Digital image correlation (DIC) has emerged as a full-field optical technique, which provides adequate resolution of the local strains close to the crack tip while providing far-field information. DIC has been applied successfully to obtain the cohesive interface fracture behavior of the FRP-concrete bond (Ali-Ahmad et al 2006;Subramaniam et al 2007;Subramaniam 2010, 2013;Carloni et al 2012). Limited number of application of DIC technique for studying the crack growth in fiber reinforced concrete have also been attempted (Robins et al 2001;Subramaniam et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Crack Propagation and Post-cracking Hinge-type Behavior in the Flexural Response of Steel Fiber Reinforced Concrete

Gali

Subramaniam

2017

Int J Concr Struct Mater

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An experimental evaluation of crack propagation and post-cracking behavior in steel fiber reinforced concrete (SFRC) beams, using full-field displacements obtained from the digital image correlation technique is presented. Surface displacements and strains during the fracture test of notched SFRC beams with volume fractions (V f ) of steel fibers equal to 0.5 and 0.75% are analyzed. An analysis procedure for determining the crack opening width over the depth of the beam during crack propagation in the flexure test is presented. The crack opening width is established as a function of the crack tip opening displacement and the residual flexural strength of SFRC beams. The softening in the post-peak load response is associated with the rapid surface crack propagation for small increases in crack tip opening displacement. The load recovery in the flexural response of SFRC is associated with a hinge-type behavior in the beam. For the stress gradient produced by flexure, the hinge is established before load recovery is initiated. The resistance provided by the fibers to the opening of the hinge produces the load recovery in the flexural response.

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Experimental determination of FRP–concrete cohesive interface properties under fatigue loading

Cited by 114 publications

References 28 publications

A Review of Direct Shear Testing Configurations for Bond between Fiber-Reinforced Polymer Sheets on Concrete and Masonry Substrates

A Review of Direct Shear Testing Configurations for Bond between Fiber-Reinforced Polymer Sheets on Concrete and Masonry Substrates

Cohesive debonding of a stiffener from an elastic substrate

Evaluation of Crack Propagation and Post-cracking Hinge-type Behavior in the Flexural Response of Steel Fiber Reinforced Concrete

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