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

• Autorzy: Hotala Eugeniusz , Ignatowicz Rajmund

Identyfikatory

DOI

10.2478/sgem-2019-0017

• Języki publikacji: EN

Abstrakty

EN

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.

Słowa kluczowe

EN

steel tank; soil settlement; tank deformations; plastic deformations; failure risk

• Wydawca: De Gruyter
• Czasopismo: Studia Geotechnica et Mechanica
• Rocznik: 2019
• Tom: Vol. 41, nr 3
• Strony: 171--176
• Opis fizyczny: Bibliogr. 8 poz., rys.

Twórcy

autor

Hotala Eugeniusz

• Faculty of Civil Engineering, Wrocław University of Science and Technology, Wrocław, Poland

autor

Ignatowicz Rajmund

• Faculty of Civil Engineering, Wrocław University of Science and Technology, Wrocław, Poland

Bibliografia

• [1] Bąkowski T. (2017). Uneven settlement of tanks. Some issues for determination of internal forces in shell-to-bottom connection. Doctoral thesis. Department of Civil Engineering and Enviroment of Gdansk University of Technology, (in polish).
• [2] Bell R. A., Junichi I. (1980). Settlement comparison used in tank – failure study. Journal of the Geotechnical Engineering Division. Proceedings of the American Society of Civil Engineers, Vo. 106. No. GT 2,1980.
• [3] Weydmann G. (2011). The effect of settlement of bottom having trough shape on stress state in steel vertical cylinder tank. Doctoral thesis. Department of Civil Engineering and Enviroment of Gdansk University of Technology , (in polish)..
• [4] Hotała E., Ignatowicz R. (2018). Failure risk of bottoms of cylindrical steel tanks supported on ring foundations. Building Materials, 4/2018, p. 88-90, (in polish).
• [5] Wu T.Y., Liu G.R. (2000). Comparison of design methods for a tank-bottom annular plate and concrete ringwall. International Journal of Pressure Vessels and Piping, 77, p. 511-517.
• [6] Lenzi M., Campana P. (2008). Ovalization of Steel Storage Tanks as a Result of Differential Settlements. Structural Engineering International, Volume 18, No. 4.
• [7] EN 14015:2004. Specification for the design and manufacture of site built, vertical, cylindrical, flat-bottomed, above ground, welded, steel tanks for the storage of liquids at ambient temperature and above.
• [8] SOFiSTiK 2018-9. Licence: Stalbet Wielkopolska dr inż. Rajmund Ignatowicz.

Uwagi

PL

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).