<abstract xmlns="http://www.w3.org/1999/xhtml"><p>Different types of foundations are used in steel, above-ground cylindrical storage tanks for liquids. If a sand-gravel foundation is used under the entire bottom of the tank or only in the central part of the tank, settlement can be expected, and it increases after many years of operation. The paper presents the typical kinds and types of soil settlements under the bottoms of the tanks, in which different types of foundations were used. Numerical analyses of the effect of the soil settlement on the state of deformations and stresses in steel sheets of the bottom under one of the real tanks, in which different types of foundations and different cases of settlement were assumed. The results of numerical analyses indicated the possibility of evaluating the state of the soil settlement and bottom sheet deformations on the basis of simple measurements of deformations of the lower part of the tank cylinder. These measurements can be very useful in assessing the possible risk of failure of the tank bottom during each period of its operation, as measurements of settlement of the bottom of a filled tank are not feasible in practice. It has been proposed that in each steel tank, the deformation of the cylinder’s sheets should be measured even before the beginning of exploitation, and that in subsequent periodical measurements, the influence of the soil settlement under the tank on the state of the cylinder deformation and bottom’s strain should be assessed more accurately.</p></abstract>

Different types of foundations are used in steel, above-ground cylindrical storage tanks for liquids. If a sand-gravel foundation is used under the entire bottom of the tank or only in the central part of the tank, settlement can be expected, and it increases after many years of operation. The paper presents the typical kinds and types of soil settlements under the bottoms of the tanks, in which different types of foundations were used. Numerical analyses of the effect of the soil settlement on the state of deformations and stresses in steel sheets of the bottom under one of the real tanks, in which different types of foundations and different cases of settlement were assumed. The results of numerical analyses indicated the possibility of evaluating the state of the soil settlement and bottom sheet deformations on the basis of simple measurements of deformations of the lower part of the tank cylinder. These measurements can be very useful in assessing the possible risk of failure of the tank bottom during each period of its operation, as measurements of settlement of the bottom of a filled tank are not feasible in practice. It has been proposed that in each steel tank, the deformation of the cylinder’s sheets should be measured even before the beginning of exploitation, and that in subsequent periodical measurements, the influence of the soil settlement under the tank on the state of the cylinder deformation and bottom’s strain should be assessed more accurately.

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

Studia Geotechnica et Mechanica

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Different types of foundations are used in steel, above-ground cylindrical storage tanks for liquids. If a sand-gravel foundation is used under the entire...

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

Article Category: Research Article

Published Online: Sep 30, 2019

Page range: 171 - 176

Received: Feb 27, 2019

Accepted: Jun 05, 2019

DOI: https://doi.org/10.2478/sgem-2019-0017

Keywords
Steel tank, soil settlement, tank deformations, plastic deformations, failure risk

© 2019 Eugeniusz Hotala, Rajmund Ignatowicz, published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

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

Article Category: Research Article

Published Online: Sep 30, 2019

Page range: 171 - 176

Received: Feb 27, 2019

Accepted: Jun 05, 2019

DOI: https://doi.org/10.2478/sgem-2019-0017

KeywordsSteel tank, soil settlement, tank deformations, plastic deformations, failure risk

© 2019 Eugeniusz Hotala, Rajmund Ignatowicz, published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Keywords
Steel tank, soil settlement, tank deformations, plastic deformations, failure risk