Golodnov K. The load-carrying capacity of steel-concrete beams under low-cyclic repeat and sign variable modes of loading

The aim of work is realization of complex researches of the tensely-deformed state and bearing strength of steel-concrete beams at the infrequently repeated and alternating modes of loading at the protracted and brief action of loading. Methodology over and results of experimental researches of steel-concrete beams and auxiliary standards are brought. Undertaken studies allowed to set conformities to law of behavior of steel-concrete beams and estimate the degree of influence of different kinds infrequently the repeated and alternating modes of loading on the tensely-deformed state and bearing strength. The method of determination of inflexibility of cuts of steel-concrete beams is worked out on all stages of loading, up to destruction. The worked out method allows to expect and to design the elements of ceiling both for the objects of new building and for those that are in exploitation. The results of comparison testify to the satisfactory coincidence of comparing sizes of bearing strength. Keywords: steel-concrete beams, infrequently repeated and alternating modes of loading, brief and protracted action of loading, bearing strength