Stress Modelling of Composite Shallow Shells of Variable Structural Rigidity

The stress state of composite structures of variable structural rigidity is calculated. Composite structures are multilayer plates and shells. Layers of such structures are interconnected by bonds that allow slipping of one layer in relation to another. Such systems have high strength and rigidity. The solution to the problem of determining the stress-strain state of such structures will significantly reduce their material consumption, subject to (in relation to) their reliability and durability. The paper considers composite shells with layers of variable thickness. The parameters of the shell include: the dimensions of the shell in the plan, the thickness of the steel sheathing of the upper and lower layers, the initial thickness of the concrete layer at the borders, the amplitude of the change in the thickness of the middle concrete layer for a given law of change, the stiffness coefficient of shear bonds between the layers. The task of calculating composite shallow shells of variable structural stiffness for strength is to determine the stresses and strains at specific loads and evaluate them from the standpoint of reducing the material consumption of these structures.