Shyliaiev O. Stress-strain state of the reinforced concrete cross-beam systems

The object of research – the process of deformation of cross-beam systems; aim – to create a computational model of deformation of reinforced concrete cross-beam systems taking into account crack formation on the basis of the numerical-analytical method of boundary elements; methods – experimental research, theoretical methods of structural mechanics, numerical-analytical method of boundary elements, finite element method, computer modeling; results – the method of calculation of cross-beam systems using the method of boundary elements taking into account torsion and change of torsional rigidity of their elements from crack formation is offered for the first time, the new approach to formation of components of the solving equation of the method of boundary elements is offered which differs from existing by universal algorithm for formation of these components for flat orthogonal rod systems, further developed a method for determining the torsional stiffness of reinforced concrete elements with normal cracks; implemented – in the educational process at the Odessa State Academy of Civil Engineering and Architecture, as well as in the design practice of LLC "PPI" GIPROPROM "(Zaporizhzhia).