Shear behaviour of hybrid composite-concrete beams: Experimental failure and strain analysis

The combination of high performance composites and concrete results in hybrid composite-concrete elements
which no longer resemble the traditional reinforced concrete structures. Consequently, these
hybrid elements have a different structural behaviour that requires new evaluation procedures. This
paper focusses on hybrid TRC-composite-concrete elements which are used as a substitute for reinforced
concrete beams within a floor system. Their shear behaviour is experimentally investigated by the examination
of ten short-span hybrid beams with different geometries.
Visual inspection shows that shear failure occurs by an inclined flexural shear crack in the concrete. A
rosette strain gauge analysis proves that the principal strain and stress orientations are in accordance
with theoretical predictions. Finally, the small influence of shear deformation on the total deflection of
these beams is illustrated.

Publication year:2016

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