Lazarieva O. Strength of continuous beams of high-strength concrete

The object is bending of continuous reinforced concrete beams of high strength concrete; the purpose is the development the methods of design strength of normal sections of continuous reinforced concrete beams of high-strength concrete under the action of short-term load using extreme criteria, numerical, optimization methods and method of limit equilibrium and the confirmation by its own experimental data and data of other authors; the method is methods of structural mechanics, numerical and optimization methods, experimental studies of continuous reinforced concrete beams of high-strength concrete, methods of mathematical statistics; the novelty is a number of new experimental data on the work, the nature of cracking, deformation and fracture of continuous reinforced concrete beams of high-strength concrete and redistribution of internal forces in them by the action of short-term load; the method of design the strength of continuous reinforced concrete beams in the busiest normal sections based on extreme criteria and the definition of limit loads on them allowing for the high quality concrete with different percentage of reinforcement and using numerical optimization methods and limit equilibrium method is offered; the results are the method of design of normal strength sections of continuous reinforced concrete beams of high strength concrete using deformation model with extreme criterion, optimization and numerical methods and limit equilibrium method that is worked out; limit strain values of the most compressed concrete fiber of characteristical normal cross section of continuous reinforced concrete beams of high-strength concrete are experimentally obtained and the nature of the redistribution of internal forces is analyzed; the industry is building