Hrebenchuk S. Rationalization of the parameters of reinforced-concrete anisotropic shells

The present Paper researches the deformed condition of the anisotropic constructions for the site-cast concrete buildings for the industrial and civil purposes. The work provides numerous analyses of the two-facial anisotropic shells with the ribs in different directions. The determined interconnection of the rational parameters of the constructive anisotropic shell between SPE of the system of internal and external rational parameters: with ribs step value of about l ≈ 1000 mm SPE reaches the lower limit. The obtained results of the external parameters are verified through the analysis of the frequencies of the systems natural vibration frequencies for all values of rise Н and maximum shell bearing capacity (qmax). It was determined that for the conditions at the camber of arch Н ≈ 3,8 m SPE reaches the lower limit. Within this research, the experimental hydraulic method of testing the different Gaussian curvature shells was improved. For the first time the reinforced-concrete anisotropic constructions were experimentally researched, the maximum values of shifts were established from the evenly distributed load in 10 kN/m2. When analyzing the numerical experiment of the construction behavior during the impact of the standard fire on it, the standard three-D structural system FE model was created which allowed solving the temperature task under unsteady conditions. The numerical analysis of the temperature fields of the anisotropic shells under unsteady conditions allowed assessing their fire-resistance which is equal to REI 60. The task was solved of the comparison of stress-strained condition structure, the models of which was made of the three-D finite-elements, at Ansys and LIRA-SAPR SC. The Thesis results are implemented in a number of objects, mainly: “The reconstruction of building in 4 Pavlovskaya str”, when constructing the complex architectural and compositional building in the form of Mobius band in Kharkov.