Abstract
This article deals with advantages and disadvantages of use of concrete filled with steel tube structures with cores of high-strength concrete. Characteristics of used materials are shown, including the physical and mechanical properties of high-strength concrete compositions designed with using the local materials. Results of experiments of short centrally compressed structural elements of steel tubes filled with high-strength concrete and according to the load transference onto complex cross-section and concrete core are presented. It has been determined the capacity relatively the deformations and it has been found the fracture character according to the way of loading and concrete core strength. The method of transference of the load results in efficiency of tube concrete element from the high strong. Load transfer method impacts the efficient of high-strength concrete filled steel tubes structure element. Carrying capacity of test samples N1 increased by 8 – 20% when load is transferred to concrete compared to complex cross-section. Longitudinal deformation decreases during the load transfer onto concrete core compared to complex cross-section load transfer.
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