FIELD: construction.
SUBSTANCE: structure is fixed on a bench, ends are fixed in accordance with the hinged support arrangement, physical parameters are loaded and measured, with the help of which based on analytical dependencies the value of the structure concrete modulus of elasticity is calculated. For structures of a certain type 5…8 reference items are made, the modulus of elasticity of which varies in the certain range of values. In each of reference items, free transverse (or longitudinal) oscillations are excited at the main frequency (or forced oscillations at the first resonant frequency), this frequency is measured, and by produced values the analytical dependence "concrete modulus of elasticity - frequency of oscillations" is built. When diagnosing the item of serial production, its main (or first resonant) frequency of oscillations is determined, and using the produced analytical dependence, the concrete modulus of elasticity is calculated.
EFFECT: reduced labour intensiveness.
3 dwg
