Bambura A. Experimental grounds of deformational applied theory of reinforced concrete

The thesis states the results of performed series experimental and theoretical researches that makes possible to develop the grounds of deformational applied theory of reinforced concrete for framed structures and which is based on real concrete and reinforcement deformation diagram under various strain-stress states and external actions. It was experimentally determine an influence of the technological factors and loading regime (uniaxial and two-axial compression, stress gradient, repeated loads of high level and action of long-term load of high level) for parameters of concrete compression diagram into wide range of it's strength variation and behaviour of reiforced concrete members under loading. The analytical relations for determination of parameters of the concrete deforming diagrams under different loading regimes were proposed and based on deformational approach an analytical procedure for defining of stress-strain state for normal cross-sections (I-beam, T-section, rectangular, triangular, circular and ring) of ordinary and pre-stressed banding and eccentrically compressed reinforced concrete members for various loading regimes. The recommendations for standardization of parameters of the concrete de-forming diagrams under various loading regimes to calculate reinforced concrete members for two groups of ultimate state are stated. So cold method of "three curva-tures" for determination of bearing capacity of the reinforced concrete continuous beams and once on deformable base was developed. The results of experimental and theoretical researches of stress-strain state for the reinforced concrete structures and members of the "Shelter" object of Chernobyl NPP, building of "Kiev-passenger" railway station, building of supermarket "METRO" in Kharkiv city and others are pre-sented.