DETERMINATION OF STRESS-DEFORMED CONDITION AND STRENGTH OF NORMAL SECTIONS OF UNCONNECTIVE REINFORCED CONCRETE BEAMS UNDER ACTIONS OF SMALL CYCLIC SECONDARY SUBJECTS

Abstract

In the article the method of determination of the stress-deformed state of in distinguish able rein forced concrete beam sand bearing capacity is presented in the light of new norm staking in to account the change of physical and mechanical properties of concrete under the influence of low-cyclic repetitive and sign-loaded loads. It has been found that low cyclic repetitive and knock-off loads essentially affect the change in the parameters of the stress-strain state, namely, reduce the bearing capacity, increase the deflection and the width of the crack opening.  Particularly these changes in parameters are significant due to the effect of low-cyclically variable loads.  The theoretical solutions agrees at is factorily with the experimental data obtained.  This is evidenced, however, that the experimental studies of the work of in continuous double-conductor beams are confirmed by the appropriateness of the proposed method for determining the stress-strain state and the strength of normal sections with the consideration of these loads.