ДО РОЗРАХУНКУ ЗАЛІЗОБЕТОННИХ ПЛИТ ЗА ДОПОМОГОЮ СТРИЖНЕВОЇ АПРОКСИМАЦІЇ

Abstract

Deflections of reinforced concrete slabs are determined by many modern methods of calculation significantly different from the experimental ones. So the plate, calculated with the nonlinear properties of the materials has a theoretical deflection, less experimental deflection. This is due in the first place to the fact that insufficient consideration of the change in stiffness due to the formation of cracks. The calculations on the vast majority of existing theories give a good match with the experimental data. However, they usually do not take into account the effect of normal cracks on the change in the stiffness of the section. The use of elasticity theory formulas can only be justified when calculating in the elastic stage and cannot be applied to fracture calculations. The finite element method (ITU) calculation is most acceptable.