FIELD: construction.
SUBSTANCE: invention relates to construction and is intended for diagnostics and quality control of reinforced concrete structures of beam type by vibration method. Summary: production of 5…8 reference articles for structures of a certain type, the modulus of elasticity of which varies in a certain range of values, installation on the stand, fixation of ends of the article according to the hinged support scheme, excitation of free transverse oscillations in the main frequency (or forced oscillations at the first resonant frequency) in each reference article. In each of the reference products, attenuation coefficient of the excited damped oscillations is measured and the derived values are used to construct the analytical dependence "modulus of elasticity of concrete - oscillation attenuation coefficient". When diagnosing the serial production article, the oscillation attenuation coefficient is determined and the modulus of elasticity of the concrete is calculated from the obtained analytical relationship.
EFFECT: technical result: reducing the error in determining the modulus of elasticity of concrete in elastic reinforced concrete beams.
1 cl, 1 tbl, 2 dwg
