Makhinko N. The methodology for calculating the reliability of steel containers for grain storage

Українська версія

Thesis for the degree of Doctor of Science (DSc)

State registration number

0520U100110

Applicant for

Specialization

  • 05.23.01 - Будівельні конструкції, будівлі та споруди

25-02-2020

Specialized Academic Board

Д 41.085.01

Odessa State Academy of Civil Engineering and Architecture

Essay

Object of research – is the actual work of steel reservoirs for grain storage under the influence of random variable loads and stochastic strength of their elements; goal is to solve the important scientific and technological problem of estimating the reliability of steel reservoirs for grain storage under the action of random variable loads on the basis of a single methodology for calculating structures for reliability; мethods are methods of mathematical modeling when describing the true picture of work of structures; finite element method for modeling stress-strain state of silo structures; methods for testing materials in the experimental study of strength of structural steels; methods of computer aerodynamics with installed pattern of flow in silo reservoirs; methods of mathematical statistics and probability theory when performing and analyzing the results of numerical experiments; methods of reliability theory of building structures to develop a common methodology for calculating the reliability of steel storage reservoirs; results – new data were obtained regarding the statistical characteristics of the conditional yield strength and time resistance; the system of scientific methods of setting the parameters for stress-strain state of the elements of the volumes was taken into account, considering a number of their structural features; for where the maximum wind flow is affecting the empty reservoir, the recommended by the analytical method for determining all internal force factors; an accurate numerical model of turbulent airflow has been developed; the author's methodology for calculating constructions of grain storage tanks for reliability was formulated; an engineering technique for determining the probability of failure-free work of structures of capacities; the concept of probabilistic calculation of multi-bolt joints of cylindrical reservoir body sheets; methods – with the calculations and design of a number of objects: PE"Lubnimash" in the calculations of a series of cylindrical reservoirs with corrugated walls and conical bottoms with diameters of 3700 to 11000 mm, and flat bottoms with diameters of 10000 to 27500 mm; LLC "ZEO Sokol" in the design of cylindrical silos, grain coolers and grain dryers; of PETKUS company when designing cylindrical and rectangular silos and small square rigid containers.

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