Load-bearing capacity of flexible reinforced concrete slabs with local changes in concrete strength

The production of building structures is accompanied by various violations of technological requirements, which may result in defects and damage to concrete, which lead to a decrease in its strength. Such defects may include surface cavities and cavities, cracks in various areas and voids in concrete. The most sensitive to such defects and damage are reinforced concrete bending structures, in particular, slabs. The influence of various positions of areas with defective concrete on the bearing capacity of hinged and clamped reinforced concrete bending slabs is considered. Graphs are constructed showing the change in the bearing capacity of reinforced concrete bending slabs depending on the strength value of the defective concrete and its location. It is established that for hinged supported slabs, the greatest danger is posed by zones with defective concrete in the span and in the corner support zones, and for clamped slabs in the middle of the support zone and in the span.