FIELD: mechanical engineering, test of parameters of quality of structures. SUBSTANCE: procedure testing integral parameters of quality of reinforced concrete structures in the form of flat or ribbed beam slabs consists in positioning of slab on test bed, in its anchoring on supports, in excitation of vibrations in slab on resonance frequency, in measurement of vibrations f and logarithmic decrement δ of vibration damping by this frequency and in comparison of obtained dynamic characteristics with analogous characteristics of standard slabs. In addition slab is loaded by concentrated load P applied in turn to specified sections of span L. For each loading stage there are determined proper dynamic characteristics and graphic dependencies are constructed by formulas f-f-lp/L and δ-lp/L, where lp is coordinate of section to which concentrated force P is applied. Values of deviation of these curves from standard ones are used to evaluate fitness of structure to operation and form of deviation determines point of location of flaw. EFFECT: given procedure is related to flat reinforced concrete structures with lack of plainness of lower edge, it presents possibility of location of latent flaws. 1 dwg, 1 tbl
