The
paper presents the experimental investigations of two thin-walled beams with
core. The tests concerns simply
supported beams under four point bending. The
beam consists of two parts made of two different materials: cold rolled
thin-walled steel
profiles and lightweight concrete cores. The interaction
between the core and the steel profiles was provided by adhesion. The following
types of steel cross-sections were investigated: rectangular section (beam 1.),
channel section (beam 2.). The experimental strain and displacement analysis of
the beams was performed. The value of the limit load corresponding to the core
cracking or to the steel profiles local buckling or to the total failure was
determined. It was observed that the bearing
capacity is smaller in the case of
the channel cross section.