Cracking and Tension Stiffening Behavior of High-Strength Concrete Tension Members Subjected to Axial Load

Lee, Giyeol; Kim, Woo

doi:10.1260/136943309788251614

Cited by 30 publications

(18 citation statements)

References 3 publications

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“…Moreover, there is no general agreement on the area of the effective concrete in tension (Figure c,d). Consequently, specimens with different dimensions are used for representing the behavior of structural elements, which naturally increases the scatter of the test results, reducing the reliability of the assessed response as well as the derived material models . Unbalanced geometry and material properties might destabilize the cracking process .…”

Section: Introductionmentioning

confidence: 99%

Deformation analysis of reinforced concrete ties: Representative geometry

Gribniak

Rimkus

Torres

et al. 2017

Structural Concrete

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Regardless of the simplicity of the test layout, interpretation of the tensile test results may be inadequate. Typically, a test of the reinforced concrete tie provides measurements of average deformations of the internal reinforcing bar and the concrete surface. The experimental evidence, however, often contradicts with the general assumption of the similarity of mean strains of the reinforcement and concrete. Analysis of the sources influencing the scatter of the experimental results motivated this investigation of the representativeness of the specimens. In this study, the representativeness is understood as a property of a tie to isolate the investigated parameters (e.g., the deformation components) from other uncontrolled effects typical of test with limited sample sizes. This study aims at determining the representative geometry of the test samples that would enable the reduction of the end effect. A consistent procedure is proposed for identifying the cracking parameters of the ties with different testing layouts.

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Section: Introductionmentioning

confidence: 99%

Deformation analysis of reinforced concrete ties: Representative geometry

Gribniak

Rimkus

Torres

et al. 2017

Structural Concrete

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“…Several models have been proposed for modeling the average tensile behavior of reinforcing bars and concrete in RC elements [12][13][14][15][16][17], while the number of recent studies on this subject shows 3 there are still debates on the accuracy of the previous models [4,[18][19][20][21]. Most of the available formulations for prediction of the crack spacing and width have been found to produce controversial results depending on the geometry of the specimens and reinforcement type [21].…”

Section: Introductionmentioning

confidence: 99%

Micromechanical modeling of tension stiffening in FRP-strengthened concrete elements

Ghiassi

Soltani

Sepehr

2018

Journal of Composite Materials

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This paper presents a micro-modeling computational framework for simulating the tensile response and tension stiffening behavior of FRP-strengthened RC elements. The total response of strengthened elements is computed based on the local stress transfer mechanisms at the crack plane including concrete bridging stress, reinforcing bars stress, FRP stress and the bond stresses at the bars-to-concrete and FRP-to-concrete interfaces. The developed model provides the possibility of calculating the average response of FRP, reinforcing bars and concrete as well as the crack spacing and crack widths. The model, after validation with experimental results, is used for a systematic parameter study and development of micromechanics-based relations for calculating the crack spacing, FRP critical ratio, debonding strength and effective bond length. Constitutive models are also proposed for concrete tension stiffening and average response of steel reinforcing bars in FRPstrengthened members as the main inputs of smeared crack modeling approaches.

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“…However as the M/θ approach is required to quantify the behaviour after cracking, it is also used to illustrate the effect of residual strains on the pre-cracking behaviour. The effects of cracking are then incorporated in the M/θ analysis through the partialinteraction analysis of concentrically loaded RC prisms which is a standard method of simulating tensionstiffening both theoretically and experimentally (Goto 1971;Mirza and Houde 1979;Somayaji and Shah 1981;Jiang et al 1984;Rizkalla and Hwang 1984;Hegemier et al 1985;Gupta and Maestrini 1990;Chan et al 1992;Choi and Cheung 1996;Marti et al 1998;Lee and Kim 2008;Wu and Gilbert 2008;Yankelevsky et al 2008;Stramandinoli and La Rovere 2008;Haskett et al 2009a, b, c;Oehlers et al 2011bOehlers et al , 2012bVisintin et al 2012b;Muhamad et al 2012;Mohamed Ali et al 2012). The effects of residual strains on tension-stiffening is then quantified.…”

mentioning

confidence: 99%

“…Application of prestress with shrinkage Application of moment to prestressed member 1984;Lee and Kim 2008;Wu and Gilbert 2008) and…”

mentioning

confidence: 99%

Incorporating Residual Strains in the Flexural Rigidity of RC Members with Varying Degrees of Prestress and Cracking

Knight

Visintin

Oehlers

et al. 2013

Advances in Structural Engineering

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The deformation of reinforced concrete columns and beams is controlled by the variation of the flexural rigidity (EI) both along the member and with applied loads and time. Currently, the moment-curvature (M/χ) approach is used to quantify EI. Prior to cracking, the M/χ approach provides a pure mechanics based solution for EI; that is, the only components of the model that have to be determined empirically are the material stress-strain relationships. However after cracking, the M/χ approach has to be semi-empirical, that is EI has to be determined empirically because the M/χ approach cannot simulate the mechanics of tension-stiffening. An alternative approach for quantifying EI using a moment-rotation (M/θ) approach is described in this paper. It is shown that the M/θ approach gives exactly the same results as the M/χ approach prior to cracking but after cracking has an advantage over the M/χ approach in that it can quantify the mechanics of tension-stiffening, that is allow for bond slip and its effect on crack spacing and crack widths. This paper deals with the mechanics of incorporating creep, shrinkage, prestress, relaxation and thermal gradients (broadly referred to as residual strains) on the flexural rigidity of RC beams and columns at all levels of loading prior to concrete softening.

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Cracking and Tension Stiffening Behavior of High-Strength Concrete Tension Members Subjected to Axial Load

Cited by 30 publications

References 3 publications

Deformation analysis of reinforced concrete ties: Representative geometry

Deformation analysis of reinforced concrete ties: Representative geometry

Micromechanical modeling of tension stiffening in FRP-strengthened concrete elements

Incorporating Residual Strains in the Flexural Rigidity of RC Members with Varying Degrees of Prestress and Cracking

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