Strength Prediction for Concrete Reinforced by Different Length and Shape Short Steel Fibers
2009
Andrejs Krasņikovs, Olga Kononova

During the fracture process of steel fiber reinforced high-performance (SFRHPC) concrete fibres are bridging the crack in the matrix providing resistance to crack propagation. Broad experimental program were realized and pull-out force versus pull-out fiber length were obtained for three types steel fibers embedded into concrete at different depth and under different angle. Follows types of steel fibers have been used- straight fibers, fibers with end hooks (Dramix), and corrugated form fibers (Tabix). Structural SFRHPC fracture model was created; material fracture process was modeled, based on single fibre pull-out law, which was determined experimentally. Elaborated model allows us to predict steel fiber reinforced concrete (SFRC) mechanical non-linear behaviour, depending on fibre content, concrete matrix mechanical properties and fibres geometry. Prediction results were validated by notched 15xl5x60cm prisms 4 point bending tests.


Atslēgas vārdi
Steel fibres, concrete, micromechanics

Krasņikovs, A., Kononova, O. Strength Prediction for Concrete Reinforced by Different Length and Shape Short Steel Fibers. Mehānika. Nr.31, 2009, 89.-93.lpp. ISSN 1407-8015.

Publikācijas valoda
English (en)
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