Polianovska O. The concrete cohesion with cresctnt-shaped steel reinforcement and improvement of calculation it anchoring in reinforced concrete elements

.We obtain new experimental data on the resistance of concrete reinforcement extracting sickle profile and on the basis of planned experiments first mathematical models to determine the traction stress reinforcement with concrete, depending on individual factors (strength concrete, rods diameter, anchoring length, repetition loads) and their interaction. It was fixed the influence of the length of the longitudinal rods anchoring for free bearings and rods, which are cut off in flight, the stress-strain state of bending concrete elements. According to experimental results was improved calculation method of anchoring reinforcement, which consists in immediate use of the proposed tensioncohesionlimit values, revised coefficients that take into account the diameter of the steel reinforcement and the protective layer of concrete.