Paramonov D. Rigidity and strength of reinforced concrete with normal cracks in bending and torsion.

Object of research - steel concrete elements of rectangular section with normal cracks; goal - improved methods for determining the torsional stiffness and bearing capacity of reinforced concrete elements with normal cracks, taking into account the influence of factors of bending and nonlinear nature of the structures; methods - method of computer modeling of structures with the use of software systems that implement the finite element method (at the time of numerous studies); numerical-analytical method using the criteria of strength and stiffness of the equations of sections; effective use of computer mathematics "MATLAB" to create a program for assessing the strength of reinforced concrete elements under study; results - determined by calculating moving crack in torsion and the coefficient of elastoplasticity; formulated proposals calculation nog force in the armature, which arises in the process of torsion elements; experimental studies in bending and torsion, and the analysis of the results obtained; novelty - first proposed according to the calculations of normal movements of the coast of cracks in torsion on the basis of the numerical approximation of the experimental data; first torsional stiffness elements with normal cracks is estimated taking into account the elastic nature of the stress-strain state of structures; are prerequisites for the calculation (for this method) nog force in the reinforcement for the spatial frameworks; developed a method of calculation determining the carrying capacity of beams under bending and torsion; implemented - the practice of design, in particular, is used in the design of reinforced concrete slabs.