Study of tank stress-strain state with irregular settlement in the zone of the edge effect action from the wall

UDK: 621.642.39

DOI: 10.24887/0028-2448-2026-3-102-105

Key words: tank, vertical steel tank (VST), stress-strain state, irregular settlement, edge effect

Authors: P.V. Chepur (Industrial University of Tyumen, RF, Tyumen); A.A. Tarasenko (Industrial University of Tyumen, RF, Tyumen); A.A. Kolyadko (Surgut Institute of Oil and Gas, RF, Surgut); I.S. Sukhachev (Industrial University of Tyumen, RF, Tyumen)

The work is devoted to the problem of assessing changes in the stress-strain state of a tank during the development of irregular settlement of the bottom panel in the vicinity of the wall. The reasons for the development of irregular settlements in the soil foundations of vertical steel tanks (VST) and the possible consequences of operating structures in such conditions are presented. The article substantiates the relevance of studying the tank stress-strain state when the settlement area is located in the zone of action of the edge effect from the wall using a numerical method. The main characteristics of the finite-element model of the tank VST-20000, used in the calculations, and the values of all parameters necessary for the calculations are presented. More than 100 calculations were carried out, based on the results of which diagrams of the distribution of maximum equivalent stresses in metal structures of VST were obtained at various thicknesses of the bottom panel, radii and locations of the settlement zone relative to the wall. Based on the results obtained, the dependences of the maximum equivalent stresses in the tank wall on the given radii and locations of the settlement zone relative to the VST wall were developed for the case of maximum permissible settlement. Analytical dependencies were also established that enable to determine the boundaries of the edge effect zone and the maximum permissible value of settlement within this zone.

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