FIELD: construction.SUBSTANCE: present invention relates to the field of construction, in particular to the testing of tensile structural elements of reinforced concrete rod systems. Method involves arranging an average cross section of the test element of the grooves with a depth and width of up to 0.1 h of the section height. In the area of the device grooves are installed symmetric on both sides of the mechanical indicators. Then the truss structure is loaded with the test load q, from the action of which a tensile force N occurs in the lower belt. Under the influence of the tensile force, a brittle component (concrete) suddenly collapses and a crack is created in the groove zone, which causes an instantaneous transfer of forces to the reinforcement and longitudinal oscillations. Then measure the amplitude of oscillations of the rebar, determine the time and frequency of oscillation of the reinforcement.EFFECT: technical result consists in the possibility of determining the dynamic parameters in the reinfo
