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[References: 11 tit.]

Studies of change dependencies of electric response parameters to mechanical impact under uniaxial compression of concrete reinforced by steel and fibreglass reinforcement have been carried out. The studies have shown that the next changes of parameters can be used as diagnostic criteria for evaluation of crack formation processes in reinforced concrete: the increasing of the energy attenuation coefficient of electric response; decreasing of the maximum correlation coefficient between signals spectra registered prior to and during the process of mechanical load; and step increasing of frequency shift value at which maximum correlation coefficient is observed.