METHOD OF DETERMINING MECHANICAL STRESS IN STEEL REINFORCEMENT OF REINFORCED CONCRETE STRUCTURE Russian patent published in 2021 - IPC G01L1/20 G01N27/82 

FIELD: construction.

SUBSTANCE: invention relates to construction, in particular to assessment of technical condition of reinforced concrete structures. Summary: reference sample is used from metal similar to that of specimen of existing structure. Performing the load action on the reference sample, measuring the physical value at different load, obtaining the dependence of the physical value on the value of stresses in the reference sample, measurement of a physical quantity in the area of control of a sample of the existing structure and determination of the value of voltage in it using the obtained relationship. Reinforcement is used as a sample, and physical quantity is represented by current intensity, which under identical conditions is determined on bare section of active reinforcement of reinforced concrete structure and on similar reference reinforcement sample. First, current is measured at different load applied to reference reinforcement sample, which is similar in material and geometric dimensions to reinforcement concrete reinforcements, then calibrated plot of current intensity dependence against mechanical stress I(σ), then determining deviation value ΔI between current intensity, measured on bare reinforced concrete structure active reinforcement section, and current strength on similar reference reinforcement sample and according to it according to calibrated curve of I(σ) determine the mechanical stress of the reinforced concrete reinforced concrete structure.

EFFECT: technical result is possibility of measuring mechanical stress in reinforcement of reinforced concrete structure.

1 cl, 2 dwg