TY - JOUR
T1 - Synergy assessment in hybrid Ultra-High Performance Fiber-Reinforced Concrete (UHP-FRC)
AU - Fantilli, Alessandro P.
AU - Kwon, Sukmin
AU - Mihashi, Hirozo
AU - Nishiwaki, Tomoya
N1 - Funding Information:
The research described in this paper was supported by Japan Society for the Promotion of Science (Grant No. 267167 , and Grant L16545 ) and by the Italian Ministry of University and Research ( PRIN 2015 ). The authors are grateful to both the sponsors for the financial supports.
Publisher Copyright:
© 2017 Elsevier Ltd
PY - 2018/2
Y1 - 2018/2
N2 - Ultra-High Performance Fiber-Reinforced Concretes (UHP-FRC) subjected to uniaxial tensile loads are investigated in the present paper. The study comprises a new procedure to assess the effectiveness of the hybridization, herein obtained by reinforcing UHP-FRC with micro and macro steel fibers. A comprehensive experimental campaign is also performed on monofiber and hybrid UHP-FRC. In all the concretes, the distance between the cracks and the minimum fiber volume fraction, which produces strain hardening response and multiple cracking, are theoretically and experimentally evaluated. If the bond parameter of the macro-fibers is properly calculated, the results of the analytical model, in terms of crack-spacing vs. fiber volume fraction, are in good agreement with the test data. Moreover, to increase the number of the cracks, and to reduce crack spacing, the hybridization is suitable only when the amount of macro-fibers is within a well-defined range.
AB - Ultra-High Performance Fiber-Reinforced Concretes (UHP-FRC) subjected to uniaxial tensile loads are investigated in the present paper. The study comprises a new procedure to assess the effectiveness of the hybridization, herein obtained by reinforcing UHP-FRC with micro and macro steel fibers. A comprehensive experimental campaign is also performed on monofiber and hybrid UHP-FRC. In all the concretes, the distance between the cracks and the minimum fiber volume fraction, which produces strain hardening response and multiple cracking, are theoretically and experimentally evaluated. If the bond parameter of the macro-fibers is properly calculated, the results of the analytical model, in terms of crack-spacing vs. fiber volume fraction, are in good agreement with the test data. Moreover, to increase the number of the cracks, and to reduce crack spacing, the hybridization is suitable only when the amount of macro-fibers is within a well-defined range.
KW - Analytical modelling
KW - Fiber-volume fraction
KW - Macro-fibers
KW - Mechanical testing
KW - Micro-fibers
KW - Monofiber
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U2 - 10.1016/j.cemconcomp.2017.10.012
DO - 10.1016/j.cemconcomp.2017.10.012
M3 - Article
AN - SCOPUS:85033365379
SN - 0958-9465
VL - 86
SP - 19
EP - 29
JO - Cement and Concrete Composites
JF - Cement and Concrete Composites
ER -