MESO SCALE MODEL FOR FIBER-REINFORCEDCONCRETE: EFFECTIVE BOND-SLIP RELATIONSHIP OF FIBERS (CROSBI ID 233376)
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Smolčić, Željko : Ožbolt, Joško
engleski
MESO SCALE MODEL FOR FIBER-REINFORCEDCONCRETE: EFFECTIVE BOND-SLIP RELATIONSHIP OF FIBERS
The paper carries out an experimental and numerical analysis of hook-end steel fiber reinforced concrete. 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 a microplane model is used as a constitutive law. The fibers are modelled by randomly generated 1D truss finite elements and the interface between concrete and fibers is simulated by employing discrete bond-slip relationship. The analysis realistically replicates 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.
Concrete; steel fibers; 3D finite element analysis; meso-scale; microplane model; bond-slip
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