Computers and Concrete

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Meso scale model for fiber-reinforced-concrete: Microplane based approach

  • Smolcic, Zeljko (Faculty of Civil Engineering of University of Rijeka) ;
  • Ozbolt, Josko (Faculty of Civil Engineering of University of Rijeka)
  • Received : 2015.02.09
  • Accepted : 2017.01.06
  • Published : 2017.04.25
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Abstract

In the present paper experimental and numerical analysis of hook-ended steel fiber reinforced concrete is carried out. The experimental tests are performed on notched beams loaded in 3-point bending using fiber volume fractions up to 1.5%. The numerical analysis of fiber reinforced concrete beams is performed at meso scale. The concrete is discretized with 3D solid finite elements and microplane model is used as a constitutive law. The fibers are modelled by randomly generated 1D truss finite elements, which are connected with concrete matrix by discrete bond-slip relationship. It is demonstrated that the presented approach, which is based on the modelling of concrete matrix using microplane model, able to realistically replicate experimental results. In all investigated cases failure is due to the pull-out of fibers. It is shown that with increase of volume content of fibers the effective bond strength and slip capacity of fibers decreases.

Keywords

References

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