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On-line Access: 2011-07-04

Received: 2010-04-21

Revision Accepted: 2010-10-09

Crosschecked: 2011-06-21

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Journal of Zhejiang University SCIENCE A 2011 Vol.12 No.7 P.495-502


A precise solution for prediction of fiber-reinforced concrete behavior under flexure

Author(s):  R. Ahmadi, P. Ghoddousi, M. Sharifi, V. Mojarrad Bahreh

Affiliation(s):  Building and House Research Center, Tehran 13145-1996, Iran, Department of Civil Engineering, Iran University of Science and Technology, Tehran 16846-13114, Iran, Department of Civil Engineering, Sharif University of Technology, Tehran 11365-11155, Iran

Corresponding email(s):   mahdysharify@gmail.com

Key Words:  Steel fiber reinforced concrete (SFRC), Flexure, Stress-crack opening, Four point bending test (FPBT)

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R. Ahmadi, P. Ghoddousi, M. Sharifi, V. Mojarrad Bahreh. A precise solution for prediction of fiber-reinforced concrete behavior under flexure[J]. Journal of Zhejiang University Science A, 2011, 12(7): 495-502.

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publisher="Zhejiang University Press & Springer",

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%DOI 10.1631/jzus.A1000193

T1 - A precise solution for prediction of fiber-reinforced concrete behavior under flexure
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PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.A1000193

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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