METHOD FOR DETERMINING THE TECHNICAL CONDITION OF REINFORCED CONCRETE BEAMS OF SUPERSTRUCTURES OF OPERATED MOTOR ROAD BRIDGES BY DEFLECTIONS THEREOF Russian patent published in 2022 - IPC G01M5/00 

FIELD: testing.

SUBSTANCE: invention relates to the field of non-destructive testing and determining the level of technical condition of reinforced concrete beams of superstructures of operated motor road bridges under impact of permanent and temporary loads. The technical condition of reinforced concrete beams is determined using a level and two rails based on the geometric levelling method. The level is installed in the measurement area, followed by installing a geodetic rail at several measurement points of the bridge structure, at the nearest end of the reinforced concrete beam of the superstructure, at the opposite end of the beam, and in the middle of the beam of the superstructure, and a measurement is taken by the level on the rail at each point in the absence of a temporary load, followed by calculating inelastic sagging deformations of the beam. A motor vehicle with a known mass then enters the bridge structure and stops at the calculated point so that the centre of gravity of the automobile is located above the middle of the span, and in the cross section the motor vehicle is installed in the least advantageous position with respect to the beam of the superstructure wherefor the technical condition is determined. The same measurements are then made in the presence of a load, followed by calculating the elastic deformations from the temporary load, calculating the relative values of deflections of each type of deformation, and comparing the obtained data with the set values, as a result whereof, the category of the technical condition of the beam of the superstructure is determined.

EFFECT: possibility of identifying a specific level of the technical condition of the structure clearly and reliably, depending on the measured elastic, inelastic, and total vertical deformations of the object.

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