SELECTION OF THE RATIONAL PARAMETERS OF THREE-LAYER REINFORCED CONCRETE STRUCTURES WITH MONOLITHIC BONDING LAYERS BY THE METHOD OF COMPUTER MODELING

For the selection of the rational physical, mechanical and geometric parameters of three-layer reinforced concrete structures with monolithic bonding layers, it is necessary to have numerous data on the stress field and patterns of their deformation upon loading, changes in the energy parameters of the strength of concrete and the thickness of the layers. The important condition for the analysis of the stress-strain state by computer simulation is verification with experimental studies. This research is a confirmation of the reliability of the partitioning of the model into finite elements, the choice of their size and configuration. Modeling of three-layered enclosing structures with overall dimensions of attic overlappings allows obtaining strains and deformations in the outer and middle layers at different levels of loads and performing their comparison with limiting values. Due to the high rigidity of the three-layered enclosing structures with a monolithic bond of the layers and the use of structural concrete in the outer layers, the strength of which is more than 10 times higher than that of the middle layer, there are no cracks in the operating loads. In order to recommend considering the stress-strain state, there are more dimensional three-layer coating plates with monolithically bonded layers with different geometric and strength parameters, with different degrees of reinforcement and levels.