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Effect of settlement of foundations on the failure risk of the bottom of cylindrical steel vertical tanks for liquids

Eugeniusz Hotala

Eugeniusz Hotala

Faculty of Civil Engineering, Wrocław University of Science and TechnologyWrocław, Poland
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Hotala, Eugeniusz
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Rajmund Ignatowicz

Rajmund Ignatowicz

Faculty of Civil Engineering, Wrocław University of Science and TechnologyWrocław, Poland
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Ignatowicz, Rajmund
  
30. Sept. 2019
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Artikel-Kategorie: Research Article
Online veröffentlicht: 30. Sept. 2019
Seitenbereich: 171 - 176
Eingereicht: 27. Feb. 2019
Akzeptiert: 05. Juni 2019
DOI: https://doi.org/10.2478/sgem-2019-0017
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© 2019 Eugeniusz Hotala, Rajmund Ignatowicz, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Figure 1

Analyzed types of tank foundations: Type A, Type B, Type C.
Analyzed types of tank foundations: Type A, Type B, Type C.

Figure 2

Chosen cases of settlement of cylindrical tanks [3]: a) in the form of a trough, b) circumferential trough near or far from the shell, c) local trough near the shell
Chosen cases of settlement of cylindrical tanks [3]: a) in the form of a trough, b) circumferential trough near or far from the shell, c) local trough near the shell

Figure 3

Penetration of rainwater under the bottom of tanks: Type A, Type B, Type C.
Penetration of rainwater under the bottom of tanks: Type A, Type B, Type C.

Figure 4

Geometry of the analyzed steel tank on a type A foundation and vertical deformations of the bottom plates uz and radial deformations of the cylinder shell ur.
Geometry of the analyzed steel tank on a type A foundation and vertical deformations of the bottom plates uz and radial deformations of the cylinder shell ur.

Figure 5

Geometry of the analyzed steel tank on a type B foundation and vertical deformations of the bottom plates uz and radial deformations ur of the shell wall.
Geometry of the analyzed steel tank on a type B foundation and vertical deformations of the bottom plates uz and radial deformations ur of the shell wall.

Figure 6

Geometry of the analyzed steel tank on a type C foundation with loosened soil zone (Kz1) and deformations uz of the bottom plate and ur of the shell.
Geometry of the analyzed steel tank on a type C foundation with loosened soil zone (Kz1) and deformations uz of the bottom plate and ur of the shell.

Figure 7

Comparison of vertical deformations uz of tank bottom plates and radial deformations ur at the point No. 2 for type A and type B foundations of uniform stiffness Kz (Fig. 4, Fig. 5).
Comparison of vertical deformations uz of tank bottom plates and radial deformations ur at the point No. 2 for type A and type B foundations of uniform stiffness Kz (Fig. 4, Fig. 5).

Figure 8

Elastic-plastic deformations ur of bottom plates at the point no. 2 for different values of width widths a, in which there was entire loosening of soil - foundation type B.
Elastic-plastic deformations ur of bottom plates at the point no. 2 for different values of width widths a, in which there was entire loosening of soil - foundation type B.

Figure 9

Elastic-plastic deformation of the bottom plate ur at point no. 1 with significant loosening of the soil at the width a = 350 mm- foundation type C.
Elastic-plastic deformation of the bottom plate ur at point no. 1 with significant loosening of the soil at the width a = 350 mm- foundation type C.

Figure 10

Elastic-plastic deformation of bottom plates ur at point no. 2, when settling in the form of a trough (fig. 2a) – foundation type B.
Elastic-plastic deformation of bottom plates ur at point no. 2, when settling in the form of a trough (fig. 2a) – foundation type B.
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