Kushnir I. Strength and deformation characteristics of composite steel and concrete beams with prestressed braces

The object is improvement of methods of calculation and design of composite structures based on the study of their actual work; the purpose is development methods of calculating the strength and deformability composite steel and concrete beams with prestressed braces and experimental investigation of their stress - strain state at the stage of destruction; the method is methods of structural mechanics, experimental tests of experimental samples, methods of mathematical statistics, comparative analysis of the data; the novelty - the first time proposed a classification of cases of stress-strain state of prestressed composite steel and concrete beams depending on the their sections and adhesion conditions of their components; first developed the method of calculating the strength and deformability composite steel and concrete beams with prestressed braces based on the deformation model; new experimental data on the stress-strain state, strength and deformability of prestressed composite steel and concrete beams with external braces; the results - developed the method of calculation of the bearing capacity of normal reduced solid rectangular cross section prestressed composite steel and concrete beams based on the deformation modeldepending on the the stress-strain state at the time of the destruction of their components; developed a method of calculating the area of prestressed tightening and strength and deformability of constructive reduced steel I-section, which is the main supporting element of prestressed composite steel and concrete beams with concrete top shelf without a clutch; the industry is building