Concrete confinement with steel-reinforced grout jackets

Thermou, Georgia E.; Katakalos, Konstantinos; Manos, George C.

doi:10.1617/s11527-013-0239-6

Cited by 46 publications

(35 citation statements)

References 34 publications

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“…3). The geometrical and mechanical properties of a single cord 12X and 3X2 as measured in tests conducted are presented in Table 2 [15] and the average stress -strain curves appear in Fig. 4.…”

Section: Experimental Program 21 Test Specimens and Materials Propertiesmentioning

confidence: 99%

“…where Ef is the modulus of elasticity of the SRG jacket and εs,eff is the effective tensile strain that develops in the jacket near failure which may occur either by debonding or rupture, whichever prevails [21]. The steel fabric is considered to have an equivalent thickness, teq, per unit width [15]. The first and second part of Eq.…”

Section: Confining Pressure Exerted By the Srg Jacketmentioning

confidence: 99%

“…Steel-Reinforced Grout (SRG) jacketing is a relatively new composite system where high strength steel reinforced fabric is combined with cementitious grout [13]. Earlier studies conducted on SRG confined concrete under uniaxial compression have demonstrated the efficiency of the system in increasing strength and axial strain capacity [14][15][16]. In the present study, the effectiveness of SRG jacketed lightly reinforced RC columns was experimentally investigated.…”

Section: Introductionmentioning

confidence: 96%

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Experimental investigation of substandard RC columns confined with SRG jackets under compression

Thermou

Katakalos

Manos

2018

Composite Structures

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This paper aims to explore the behaviour of substandard reinforced concrete (RC) columns confined with Steel-Reinforced Grout (SRG) jackets under monotonically increasing uniaxial compression. A total of 24 specimens of short RC columns of square cross section were designed to fail due to longitudinal reinforcement buckling. Single-layered SRG jackets were applied to 18 of these specimens, whereas the rest served for control without SRG jackets. Parameters of this investigation were the type and density of the steel fabric as well as the corner radius of the cross section. The employed SRG jacketing managed to increase the strength and strain capacity and postpone the buckling of the longitudinal steel bars to occur at higher compressive strain level. Confinement effectiveness with respect to the lateral confining pressure exerted by the used SRG jacketing is discussed along with the observed mode of failure.

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Section: Experimental Program 21 Test Specimens and Materials Propertiesmentioning

confidence: 99%

Section: Confining Pressure Exerted By the Srg Jacketmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 96%

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Experimental investigation of substandard RC columns confined with SRG jackets under compression

Thermou

Katakalos

Manos

2018

Composite Structures

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“…These systems are capable of ensuring the same advantages of FRP strengthening systems, in terms of easiness of application, low invasiveness, and reduced intervention time, but with a lower cost, better fire resistance, and a higher compatibility with existing structures, compared to FRP materials [9,10]. The properties and potential applications of these new materials have been analyzed in some experimental investigations [11][12][13][14][15][16][17][18][19][20][21][22], but few of the studies are concerning the numerical modeling of structural elements strengthened with them [23]. In order to carry out analytical and numerical (FE) analyses of SRG/SRP strengthened RC members specific analytical tools [24] and bond-slip models [23], should be used, respectively.…”

Section: Introductionmentioning

confidence: 99%

3D FE Analysis of RC Beams Externally Strengthened with SRG/SRP Systems

Bencardino

Condello

2016

Fibers

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Abstract:The purpose of this study is to evaluate, through a nonlinear Finite Element (FE) analysis, the structural behavior of Reinforced Concrete (RC) beams externally strengthened by using Steel Reinforced Grout (SRG) and Steel Reinforced Polymer (SRP) systems. The parameters taken into account were the external strengthening configuration, with or without U-wrap end anchorages, as well as the strengthening materials. The numerical simulations were carried out by using a three-dimensional (3D) FE model. The linear and nonlinear behavior of all materials was modeled by appropriate constitutive laws and the connection between concrete substrate and external reinforcing layer was simulated by means of cohesive surfaces with appropriate bond-slip laws. In order to overcome convergence difficulties, to simulate the quasi-static response of the strengthened RC beams, a dynamic approach was adopted. The numerical results in terms of load-displacement curves, failure modes, and load and strain values at critical stages were validated against some experimental data. As a result, the proposed 3D FE model can be used to predict the structural behavior up to ultimate stage of similar strengthened beams without carrying out experimental tests.

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“…There is an ample amount of information available in the literature concerning the behaviour of RC columns wrapped with CFRP, GFRP and AFRP sheet (a few are listed: [1][2][3][4][5][6][7][8][9][10][11][12][13][14]). However, only recently, SFRP sheets have attracted researchers' interest for confinement applications due to the significant enhancement it offers to the RC columns compared to the conventional FRP sheets [15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Cost and Ductility Effectiveness of Concrete Columns Strengthened with CFRP and SFRP Sheets

Abd-Elrahman

El‐Hacha

2014

Polymers

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Abstract:Recently, steel fibre reinforced polymers (SFRP) sheets have been introduced for the repair and rehabilitation of concrete structures. Few researchers studied the behaviour of the concrete columns wrapped with SFRP sheets; however, several critical parameters such as the cost and ductility effectiveness of the SFRP wrapped concrete columns have been lightly addressed. Thus, the main objective of this paper is to study the cost and ductility effectiveness of SFRP wrapped concrete columns and compare the results with the conventionally used carbon FRP (CFRP) wrapped concrete columns. In addition, an analytical procedure to predict the cost effectiveness of SFRP wrapped concrete columns is also suggested, from which, a parametric study was conducted. The parametric study investigated the effect of the concrete strength, the number of SFRP layers, and the size and slenderness effects on the cost effectiveness of the concrete columns wrapped with SFRP sheets. The results from the cost and ductility effectiveness study indicated that the SFRP wrapped concrete columns showed enhanced performance over the CFRP wrapped concrete columns. The suggested analytical procedure proved to be a reliable and accurate method to predict the cost effectiveness parameter of SFRP wrapped concrete columns. The parametric study showed the significant impact of the investigated parameters on the cost effectiveness of concrete columns wrapped with SFRP sheets.

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Concrete confinement with steel-reinforced grout jackets

Cited by 46 publications

References 34 publications

Experimental investigation of substandard RC columns confined with SRG jackets under compression

Experimental investigation of substandard RC columns confined with SRG jackets under compression

3D FE Analysis of RC Beams Externally Strengthened with SRG/SRP Systems

Cost and Ductility Effectiveness of Concrete Columns Strengthened with CFRP and SFRP Sheets

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