Stress-strain state of reinforced concrete basement floors of cowsheds after changing the loading regime

Abstract

The article presents the results of a detailed instrumental examination of the load-bearing structures of prefabricated reinforced concrete basement floors of cowshed buildings No. 3, No. 4, No. 5 and No. 6, located at Adamkivska Street, Building 1 in the village of Zorya, Rivne district, Rivne region. Within the framework of these studies, measurements of the load-bearing structures of basement floors and basements of buildings were performed with the preparation of the corresponding drawings. Using non-destructive testing methods, the cubic strength of concrete of columns, beams and floor slabs was determined. Their reinforcement, the degree of loss of cross-section of concrete and reinforcement as a result of the influence of an aggressive environment were also investigated. Based on the data obtained, a set of measures to restore the initial properties of the structures was proposed. The stress-strain state of basement floors of cowshed buildings under the action of new loading modes on them from the new method of keeping cows, as well as from the use of new modern equipment was analyzed. Constructive solutions for the restoration and reinforcement of the structure of prefabricated reinforced concrete floors are proposed, which will make it possible to perceive the loads that will act after the reconstruction of buildings. Using the PC Lira-Sapr, the finite element method was used to model the operation of the prefabricated reinforced concrete frame of the above-basement floor of buildings, taking into account new types of loads. A monolithic reinforced concrete distribution slab was calculated on top of the existing floor to transfer new loads to existing structures. The use of such a solution allowed to preserve the existing floor and use its residual resource for further safe and reliable operation of the cowshed buildings.