A precise solution for prediction of fiber-reinforced concrete behavior under flexure |
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| Authors: | R Ahmadi P Ghoddousi M Sharifi and V Mojarrad Bahreh |
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| Institution: | (1) Department of Structural Engineering, Politecnico di Milano, Milan, Italy |
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| Abstract: | This paper presents a precise solution to predict the behavior of steel fiber reinforced concrete (SFRC) under the four point
bending test (FPBT). All the force components at the beam section (before and after cracking) are formulated by applying these
assumptions: a realistic stress-strain model is used for concrete behavior in compression, a linear response is considered
for the uncracked tension region in a concrete constitutive model, and an exponential relationship is proposed as a stress-crack
opening in the crack region which requires two parameters. Then the moment capacity of the critical cracked section is calculated
by using these forces and satisfying equilibrium law at the section. Parametric studies are done on the behavior of SFRC to
assess the sensitivity of the solution. Finally, this solution is validated with some existing experimental data. The result
shows the proposed solution is able to estimate the behavior of SFRC under FPBT. |
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