Assessment of the residual service life of reinforced concrete slabs with corrosion damage

In connection with the exhaustion of the service life of a significant number of buildings and structures throughout the country, assessing their residual service life in general and load-bearing structures separately is an urgent task. The constant degradation of reinforced concrete bending elements due to the simultaneous impact of force and environmental factors leads to the risk of an accident and collapse. The choice of a method for determining the residual service life of building structures, which makes it possible to determine the probable moment of the onset of the limit state, remains a topical issue. The authors reviewed and analyzed the existing methods for assessing the residual service life of building structures of buildings and structures. Based on the analysis of existing methods and the experience of field surveys of building structures of buildings and structures, a method for determining the residual service life of reinforced concrete bending elements is proposed. The calculations of the residual service life of reinforced concrete floors according to the existing and proposed methods are given, the directions for their improvement are indicated. It is shown that it is advisable to determine the residual service life based on the results of field surveys and verification calculations of reinforced concrete structures, taking into account the identified corrosion damage to concrete and reinforcement caused by an aggressive operating environment, as well as determining the parameters and trends in the development of corrosion damage.