Erratum: Settlement limitations for cylindrical steel storage tanks

1983 ◽  
Vol 20 (2) ◽  
pp. 371-371
Author(s):  
Peter Rosenberg ◽  
Noël L. Journeaux
Keyword(s):  
Storage Tanks ◽  
Cylindrical Steel

The tapered beam model for bottom plate uplift analysis of unanchored cylindrical steel storage tanks

2009 ◽  
Vol 31 (3) ◽  
pp. 623-632 ◽  
Author(s):  
Masoud Nourali Ahari ◽  
Sassan Eshghi ◽  
Mohsen Ghafory Ashtiany
Keyword(s):  
Bottom Plate ◽  
Beam Model ◽  
Storage Tanks ◽  
Tapered Beam ◽  
Cylindrical Steel

Settlement limitations for cylindrical steel storage tanks

1982 ◽  
Vol 19 (3) ◽  
pp. 232-238 ◽  
Author(s):  
Peter Rosenberg ◽  
Noël L. Journeaux
Keyword(s):  
Petroleum Industry ◽  
Storage Tanks ◽  
Cylindrical Steel

Tank inspections in the petroleum industry often include an evaluation of settlement effects. Tank failures and floating-roof problems have often been attributed to distortion of tanks due to settlement. In geotechnical practice evaluation of excessive settlement is done by referring to empirically derived limits that vary considerably.In this study the authors took settlement data from the literature and their own studies, and compared the results with limits commonly used in tank evaluations. On this basis tentative limit criteria are suggested that can be used in estimating the probability of the occurrence of tank problems.

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

2019 ◽  
Vol 41 (3) ◽  
pp. 171-176 ◽  
Author(s):  
Eugeniusz Hotala ◽  
Rajmund Ignatowicz
Keyword(s):  
The State ◽  
Numerical Analyses ◽  
Storage Tanks ◽  
Steel Sheets ◽  
Failure Risk ◽  
Different Types ◽  
Steel Tank ◽  
Soil Settlement ◽  
Tank Bottom ◽  
Cylindrical Steel

AbstractDifferent 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.

Stability of Open Top Cylindrical Steel Storage Tanks: Design of Top Wind Girder

2017 ◽  
Vol 139 (3) ◽  
Author(s):  
E. Azzuni ◽  
S. Guzey
Keyword(s):  
Design Methodology ◽  
Geometrically Nonlinear ◽  
Storage Tanks ◽  
Element Analysis ◽  
Geometrically Nonlinear Analysis ◽  
Buckling Loads ◽  
Upper Limit ◽  
Current Design ◽  
Cylindrical Steel ◽  
Different Diameters

Design of the top wind stiffeners of aboveground storage tanks designed to the requirements of API 650 is investigated. The current design methodology is based on intuition and experience without a sound technical justification. This paper investigates a diameter limit to be used in the design of the top stiffener ring by using finite-element analysis (FEA) in a parametric study. Linear bifurcation analysis (LBA) and geometrically nonlinear analysis including imperfections (GNIA) were performed on cylindrical storage tanks. By modeling tanks with different diameters and limiting the design of top stiffener ring for a diameter of 170-ft (52-m), the buckling loads are investigated. It was found that the 170-ft (52-m) diameter is a suitable upper limit to design the top stiffener rings for larger diameters.

Design of Cylindrical Steel Storage Tanks: A Linear Elastic Analysis Approach

2016 ◽  
Author(s):  
Eyas Azzuni ◽  
Sukru Guzey
Keyword(s):  
Hydrostatic Pressure ◽  
Circumferential Stress ◽  
Liquid Product ◽  
Analysis Approach ◽  
Storage Tanks ◽  
Bottom Edge ◽  
Linear Elastic ◽  
Cylindrical Steel ◽  
The One ◽  
Thin Shell Theory

A cylindrical steel storage tank is a cylindrical shell subjected to internal hydrostatic pressure due to the stored liquid product. The hydrostatic pressure causes the shell to experience circumferential stress. This circumferential stress can lead to the yielding of the shell if its thickness is not designed properly. The design of step-walled steel storage tanks requires the calculation of the required thickness of each shell course. A conservative way of calculating each course’s thickness is using the one-foot method (1FM). This method calculates the required thickness to withstand the hydrostatic pressure one foot above the bottom edge of the shell course under consideration. Another method, which is more refined than the 1FM, is the variable-design-point method (VDM), which finds the point in the course where the maximum circumferential stress is. VDM calculates the required shell thickness to withstand that maximum circumferential stress. However, VDM does not capture the circumferential stress resulting from the bottom edge yielding moment accurately for some thank geometries. A new linear analysis approach using thin-shell theory is presented in this paper. The approach captures the plastic yielding moment of the bottom edge accurately, and may produce more economical and safe designs than 1FM and VDM.

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