The article considers the issue of measuring and controlling the parameters of a high-voltage AC circuit using a Bragg grid. A model of a fiber-optic sensor based on the magnetostriction effect, the main component of which is a fiber-Bragg grating, is proposed. The 3D modeling of the magnetostriction process and the design of the block diagram are carried out.

Keywords: optical fiber, magnetostriction, bragg grid, AC, sensor, solenoid, coil, nickel, ferrite, MathCAD, COMSOL

We consider eccentrically compressed rod elements of reinforced concrete structures. Problems are solved for the development of methods for calculating the strength of normal sections in the case of eccentric compression of reinforced concrete elements; calculation of the load-carrying capacity of reinforced concrete structures by the example of columns of varying flexibility for ultimate effort. Analytically, a calculation is made, which makes it possible to determine the strength of reinforced concrete structures.

Keywords: внецентренно сжатые стержни, железобетонные конструкции, прочность, нормальные сечения, колонны различной гибкости, несущая способность, предельные усилия