Energy dissipation capacity of fibre reinforced concrete under biaxial tension–compression load. Part II: Determination of the fracture process zone with the acoustic emission technique

Tschegg, E. K.; Schneemayer, Andreas; Merta, Ildikó; Rieder, Klaus‐Alexander

doi:10.1016/j.cemconcomp.2015.07.003

Cited by 27 publications

(13 citation statements)

References 11 publications

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“…E.K. Tschegg [ 19 ] also obtained similar results. With the addition of steel fiber, the crack development path becomes relatively tortuous, from the single crack propagation of the reference group to the multi-point cracking of more than one crack, and with the increase of V F , the crack propagation path becomes more tortuous.…”

Section: Test Results and Analysissupporting

confidence: 58%

Experimental Study on the Fracture Parameters of Concrete

Wang

Gou

2020

Materials

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This study aimed to determine the influence of the volume fraction of steel fibers on the fracture parameters of concrete. Fifty notched steel-fiber-reinforced concrete (SFRC) beams and ordinary concrete beams with 100 mm × 100 mm × 515 mm were cast and tested via a three-point bending test. Among them, the type of steel fiber was the milling type (MF), and the volume fraction of steel fiber added was 0%, 0.5%, 1%, 1.5% and 2%, respectively. The effects of the steel fiber volume fraction (VF) on the critical stress intensity factor (KIC), fracture energy (GF), the deflection at failure(δ0), the critical crack mouth opening displacement (CMODC) and the critical crack tip opening displacement (CTODC) were studied. Through the analysis of test phenomena and test data such as the load-deflection (P-δ) curve, load-crack mouth opening displacement (P-CMOD) curve and load-crack tip opening displacement (P-CTOD) curve, the following conclusions are drawn: with the increase of the steel fiber volume fraction, some fracture parameters increase gradually and maintain a certain linear growth. The gain ratio of the fracture parameters increases significantly, and the gain effect is obvious. Through this law of growth, the experimental statistical formulas of fracture energy and the critical stress intensity factor are summarized.

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Section: Test Results and Analysissupporting

confidence: 58%

Experimental Study on the Fracture Parameters of Concrete

Wang

Gou

2020

Materials

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“…E.K. Tschegg [18] also got similar results. With the addition of steel fiber, the crack development path becomes relatively tortuous, from the single crack propagation of the reference group to the multi-point cracking of more than one crack, and with the increase of VF, the crack propagation path becomes more tortuous.…”

Section: Fracture Toughnesssupporting

confidence: 63%

Experimental Study on the Fracture Parameters of Concrete

Wang

Gou

2020

Preprint

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This study was aimed to determine the influence of the volume fraction of steel fibers and on fracture parameters of concrete. Fifty notched steel fiber reinforced concrete (SFRC) beams and ordinary concrete beams with dimensions of 100mm×100mm×515mm were cast and tested via three-point bending test. Among them, the type of steel fiber is milling type (MF), and the volume fraction of steel fiber added is 0%, 0.5%, 0.5%, 1.5%, 1.5%, 2%, respectively. The effects of the steel fiber volume fraction (VF) on the critical stress intensity factor (KIC), fracture energy (GF), the deflection at failure(δ0), the critical crack mouth opening displacement (CMODC) and the critical crack tip opening displacement (CTODC)were studied. Through the analysis of test phenomena and test data such as load-deflection (P-δ) curve, load-crack mouth opening displacement (P-CMOD) curve and load-crack tip opening displacement (P-CTOD) curve following conclusions are drawn: With the increase of steel fiber volume fraction, some fracture parameters increase gradually and maintain a certain linear growth. The gain ratio of fracture parameters increases significantly, and the gain effect is obvious. Through this law of growth, the experimental statistical formulas of fracture energy and critical stress intensity factor are summarized.

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“…Thus, for each value of the steel fiber volume fraction ratio, the corresponding line equation which is used to calculate τ ult should be determined. Based on the related literature [55][56][57][58][59][60][61][62][63][64][65][66][67], a coefficient, m, should be adopted for properly modifying Equation (20) to calculate the ultimate shear stress when using HSFC or UHSFC with fiber volume fraction ratio equal to 1.0% or 1.5% (Equation ( 21)). Kölle [59] experimentally investigated the biaxial strength of high performance SFC for different fiber types and for different fiber volume fraction ratios.…”

Section: Proposed Approach For the Design Of Hsfc And Uhsfc Jacketsmentioning

confidence: 99%

Analytical Model for the Design of HSFC and UHSFC Jackets with Various Steel Fiber Volume Fraction Ratios for the Retrofitting of RC Beam-Column Joints

Tsonos

Kalogeropoulos

2021

Sustainability

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High-strength steel fiber-reinforced concrete (HSFC) and ultra-high strength steel fiber-reinforced concrete (UHSFC) jackets have been proved experimentally to be much more effective with respect to other strengthening schemes in improving the hysteresis performance of existing substandard reinforced concrete (RC) structural members. In this paper, an existing analytical model for the prediction of the shear capacity of RC beam-column joints strengthened with a HSFC or UHSFC jacket is extended to provide design formulation of these innovative HSFC and UHSFC jackets. An authoritative validation of the proposed formulation is also achieved by comparisons of experimental results of 50 beam-column joint specimens with the analytical predictions of the model. Test data used for verification have been collected from the literature based on experimental studies of the authors and other researchers. The merits of the HSFC and UHSFC jacketing technique are also highlighted in the state of practice. Design and application of the proposed fiber-reinforced concrete jackets in deficient existing RC beam-column joints provides a sustainable strengthening technique by contributing to the reduction in the cost and to labor-intensive procedures of common jackets by completely replacing the installation of reinforcement.

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Energy dissipation capacity of fibre reinforced concrete under biaxial tension–compression load. Part II: Determination of the fracture process zone with the acoustic emission technique

Cited by 27 publications

References 11 publications

Experimental Study on the Fracture Parameters of Concrete

Experimental Study on the Fracture Parameters of Concrete

Experimental Study on the Fracture Parameters of Concrete

Analytical Model for the Design of HSFC and UHSFC Jackets with Various Steel Fiber Volume Fraction Ratios for the Retrofitting of RC Beam-Column Joints

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