Elliptical and circular FRP-confined concrete sections: A Mohr–Coulomb analytical model

Moran, Domingo A.; Pantelides, Chris P.

doi:10.1016/j.ijsolstr.2011.12.012

Cited by 42 publications

(19 citation statements)

References 42 publications

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“…Since the value of e co has some effect on the theoretical predictions, the measured axial strain e co of unconfined concrete was used whenever it was needed in making the theoretical predictions. It can be seen from Figures 9 to 12 that the FE approach provides closer predictions of the test results than Moran and Pantelides's (2012) model.…”

Section: Comparison With Theoretical Predictionsmentioning

confidence: 90%

“…It should be mentioned that the expression adopted for the frictional angle in the Mohr-Coulomb yield criterion employed in Moran and Pantelides's (2012) model is related to the basic angle of internal friction of concrete, whose value is expected to range between 15.3°and 37.5°(i.e. 15.3°ł u be ł 37.5°).…”

Section: Comparison With Theoretical Predictionsmentioning

confidence: 99%

“…analytical stress-strain model and FE analysis), the average rupture strain of the CFRP jacket from the test, e h, rup , as given in Table 3, was used to terminate the analysis. More specifically, for Moran and Pantelides's (2012) model, the average effective diagonal strain, which was defined to characterize the rupture failure of the jacket, was taken to be equal to the average experimental hoop rupture strain of the FRP jacket; for the FE analysis, the average experimental hoop strain was compared with the average of the FE outer surface hoop strains of nodal points in the elliptical FRP jacket closest to the hoop strain gauges (the FE outer surface hoop strains are simply referred to as FE hoop strains hereafter; they were found to be basically identical to the FE midsurface hoop strains). Since the value of e co has some effect on the theoretical predictions, the measured axial strain e co of unconfined concrete was used whenever it was needed in making the theoretical predictions.…”

Section: Comparison With Theoretical Predictionsmentioning

confidence: 99%

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Behavior and modeling of fiber-reinforced polymer-confined concrete in elliptical columns

Teng

Casalboni

et al. 2016

Advances in Structural Engineering

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Conversion of rectangular columns into elliptical columns (i.e. shape modification) followed by fiber-reinforced polymer jacketing provides an attractive alternative strengthening method than direct fiber-reinforced polymer jacketing of rectangular reinforced concrete columns (with corner rounding). For this method to be widely used in practice, a design method for the fiber-reinforced polymer jacket needs to be developed, and the key to such a design method is a reliable and yet relatively simple stress-strain model for fiber-reinforced polymer-confined concrete in elliptical reinforced concrete columns. This article presents a combined experimental and finite element study from which a stress-strain model for fiber-reinforced polymer-confined concrete in elliptical columns was derived. The article first presents the experimental program designed to examine the effects of key parameters. The accuracy of a finite element model for fiber-reinforced polymer-confined elliptical concrete columns is then demonstrated through comparisons with the test results. Finally, on the basis of the test data as well as the numerical results obtained with the verified finite element model, a simple and accurate stress-strain model for fiber-reinforced polymer-confined concrete in elliptical columns is formulated for use in design.

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Section: Comparison With Theoretical Predictionsmentioning

confidence: 90%

Section: Comparison With Theoretical Predictionsmentioning

confidence: 99%

Section: Comparison With Theoretical Predictionsmentioning

confidence: 99%

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Behavior and modeling of fiber-reinforced polymer-confined concrete in elliptical columns

Teng

Casalboni

et al. 2016

Advances in Structural Engineering

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“…Considering the analysis of rock, soil, and concrete against shear strength, the Mohr-Coulomb criterion (equation 1) can be used to analyse the shear resistance of CGCAB [38][39][40].…”

Section: Shear Strengthmentioning

confidence: 99%

Effects of Corn Stalk Fly Ash (CSFA) on the Mechanical and Deformation Properties of Cemented Coal Gangue Backfill

Wang

Feng

et al. 2020

Advances in Materials Science and Engineering

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To reduce the amount of cement used in cemented coal gangue backfill (CCGB, a mixture of coal gangue, cement, fly ash, and water), mechanical and deformation properties of CCGB in which CSFA partially replaces the cement (0, 10, 20, 30, and 40 wt%) were studied. Compressive strength, acoustic emission during uniaxial loading, shear strength, and drying shrinkage were analysed. The compressive strength, shear strength, and drying shrinkage tests were performed at different curing times. The results showed that cemented coal gangue and corn stalk fly ash backfill (CGCAB) presented better performance, and the CGCAB with a 20% substitution rate had the best performance at day 28. Despite having the largest drying shrinkage value, 20% is the best choice for the substitution rate of CSFA. A 20% CSFA addition can enhance the bearing capacity of CGCAB and improve its failure mode, which is of great significance to support the upper overburden load and maintain the surface stability of the goaf.

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“…Using triaxial tests, many other authors proposed different expressions for k 1 ; for instance, k 1 = 3.5 was proposed by Teng et al [19]. Recent studies (e.g., two of the latest are Moran and Pantelides [20] and Girgin [21]) suggested, to best-fit experimental data, that the value of k 1 should be also assumed as a function of the confinement level and should take into account the influence of the concrete strength on the ultimate behavior.…”

Section: Simplified Model For Square Sectionsmentioning

confidence: 99%

Simplified Modeling of Rectangular Concrete Cross-Sections Confined by External FRP Wrapping

2014

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Abstract:The goal of this research project is to model the effect of confinement by means of fiber reinforced polymer (FRP) externally bonded wrapping, hence to provide a simplified closed form solution to determine directly the ultimate confined concrete strength. Common cross-section shapes for reinforced concrete (RC) columns are considered herein, namely square and rectangular. The simplified model is derived from a more refined iterative confinement model proposed by the same authors to evaluate the entire stress-strain relationship of confined concrete. Based on a detailed analysis of the stress state through Mohr's circle, a simplified closed form solution is proposed to account for the non-uniformly confined concrete performance exhibited in non-axisymmetric sections. The non-uniform confining stress field exhibited in such cross-sections is explicitly considered by means of the mean value integral of the pointwise variable stress state over the cross-section. The key aspect of the proposed methodology is the evaluation of the effective equivalent pressure to be inserted in any triaxial confinement model, to account for the peculiarities of square and rectangular cross-sections. Experimental data, available in the literature and representative of a wide stock of applications, were compared to the results of the theoretical simplified model to validate the proposed approach, and satisfactory results were found.

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Elliptical and circular FRP-confined concrete sections: A Mohr–Coulomb analytical model

Cited by 42 publications

References 42 publications

Behavior and modeling of fiber-reinforced polymer-confined concrete in elliptical columns

Behavior and modeling of fiber-reinforced polymer-confined concrete in elliptical columns

Effects of Corn Stalk Fly Ash (CSFA) on the Mechanical and Deformation Properties of Cemented Coal Gangue Backfill

Simplified Modeling of Rectangular Concrete Cross-Sections Confined by External FRP Wrapping

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