Influence of concrete technological damage at the moments of reinforced concrete beams cracking
Journal Title: Вісник Одеської державної академії будівництва та архітектури - Year 2017, Vol 1, Issue 67
Abstract
The aspects of managing the processes of composite building materials structure arrangement (CBM) including at different levels of heterogeneity are studied and are associated with changes in the qualitative and quantitative compositions of the cementing material. Scientists who previously dealt with the investigated issue are represented. The research task is defined, and it consists in the fact that it is necessary to determine the influence of structural factors on the change of the moments of bent reinforced concrete elements crack growth along normal sections. The factors were determined: the dispersion and the amount of filler. The physical meaning is revealed, it consists in estimating the specific length of surface cracks, manifested on a unit both in surface and in length. In determining the coefficients of technological damage of the beams, two lines were drawn on two sides of the beam: three vertical ones in the zone of simple bending, four inclined in the zone of joint action of the bending moment and transverse force- four inclined. The results of experimental and theoretical studies of the structural factors effect (the amount and disparity of the mineral dust) on the change of the moments of bent reinforced concrete elements crack growth along normal sections are presented. The analysis of technological damage influence on the moments of experimental beams fracture was carried out, and the regularity of the quantitative evaluation of technological damage was determined. The technique for determining the evaluation of technological damage is discovered. The diagrams of the dependence of the crack growth moments from the variable factors are constructed.
Authors and Affiliations
N. V. , Oliinyk, I. , Bichev, L. , Lukashenko
Keywords
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