Nizhnik A. Compressed elements produced from composite steel doubl-T with lateral free speces by concrete.

Item - the compressed elements produced whith steel compound double-Ts whith leteral cavities filled with concrete. Aim - developing of techniques to calculate the strength and to appreciate the strength-deformation features of elements under research. Procedures - research on strength and deformation features and durability while compressed. Teoretical Results - the procedure of calculation on bearing capacity and strength-deformation features of the elements under review have been substantiated. Practical Results - the designing of bearing compressed elements. Innovative - the new procedures to reinfors the lateralcavities of compound steel doubl-Ts which harmonize the joint co-work of concrete with steel double-T have been proposed; the characteristic destructive features of samples under review have been revealed;the influence on the functioning of different compressed elements of different size have been substantiated; the procedures of calculating the durability and strength-deformative state ofthe proposed elements have been developed. The obtained results have been implemented in designing of bearing compressed elements produced from steel compound double-Ts whith leteral cavities filled whith concrete. Field of application - construction (civil engineering).