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Journal of Zhejiang University SCIENCE A 2006 Vol.7 No.3 P.398~406

10.1631/jzus.2006.A0398


Floating-roof steel tanks under harmonic settlement: FE parametric study and design criterion


Author(s):  Zhao Yang, Cao Qing-shuai, Xie Xin-yu

Affiliation(s):  Department of Civil Engineering, Zhejiang University, Hangzhou 310027, China

Corresponding email(s):   ceyzhao@zju.edu.cn

Key Words:  Steel tanks, Floating-roof, Differential settlement, Harmonic settlement, Finite element analysis, Design criterion


Zhao Yang, Cao Qing-shuai, Xie Xin-yu. Floating-roof steel tanks under harmonic settlement: FE parametric study and design criterion[J]. Journal of Zhejiang University Science A, 2006, 7(3): 398~406.

@article{title="Floating-roof steel tanks under harmonic settlement: FE parametric study and design criterion",
author="Zhao Yang, Cao Qing-shuai, Xie Xin-yu",
journal="Journal of Zhejiang University Science A",
volume="7",
number="3",
pages="398~406",
year="2006",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.2006.A0398"
}

%0 Journal Article
%T Floating-roof steel tanks under harmonic settlement: FE parametric study and design criterion
%A Zhao Yang
%A Cao Qing-shuai
%A Xie Xin-yu
%J Journal of Zhejiang University SCIENCE A
%V 7
%N 3
%P 398~406
%@ 1673-565X
%D 2006
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.2006.A0398

TY - JOUR
T1 - Floating-roof steel tanks under harmonic settlement: FE parametric study and design criterion
A1 - Zhao Yang
A1 - Cao Qing-shuai
A1 - Xie Xin-yu
J0 - Journal of Zhejiang University Science A
VL - 7
IS - 3
SP - 398
EP - 406
%@ 1673-565X
Y1 - 2006
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.2006.A0398


Abstract: 
Large vertical steel tanks for fluid storage are usually constructed on soft foundations, so it is not surprising that the tank wall will settle unevenly with the settlement of the foundation, thus inducing deformations and stresses in the tank. This work investigates the linear static behavior of floating-roof tanks under harmonic settlement through finite element (FE) analyses. The influences of the radius-to-thickness ratio, the height-to-radius ratio and the wind girder stiffness on the structural behavior are first analyzed. Comparisons between the circumferential stresses in the wind girder and the vertical stresses in the tank bottom are then made. The displacement and the stress along the tank height are also discussed, and the concept of tank division along its height is presented. Finally, a design approximation for the radial displacement at the tank top is developed based on FE results, and a settlement criterion based on the top radial displacement is proposed which can be used in practical design.

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Reference

[1] GB 50341, 2003. Code for Design of Vertical Cylindrical Welded Steel Oil Tanks. Chinese Planning Press, Beijing (in Chinese).

[2] Godoy, L.A., Sosa, E.M., 2003. Localized support settlements of thin-walled storage tanks. Thin-Walled Structures, 41(10):941-955.

[3] Jonaidi, M., Ansourian, P., 1996. Effects of Differential Settlement on Storage Tank Shells. Advances in Steel Structures. Proceedings of First International Conference on Advances in Steel Structures, Elsevier, p.821-826.

[4] Jonaidi, M., Ansourian, P., 1998. Harmonic settlement effects on uniform and tapered tank shells. Thin-Walled Structures, 31(1-3):237-255.

[5] Kamyab, H., Palmer, S.C., 1989. Analysis of displacements and stresses in oil storage tanks caused by differential settlement. Proceedings of the Institution of Mechanical Engineers, Part C. Journal of Mechanical Engineering Science, 203(C1):61-70.

[6] Malik, Z., Morton, J., Ruiz, C., 1977. Ovalization of cylindrical tanks as a result of foundation settlement. Journal of Strain Analysis, 12(4):339-348.

[7] Marr, W.A., Ramos, J.A.J., Lambe, T.W., 1982. Criteria for settlement of tanks. Journal of the Geotechnical Engineering Division, ASCE, 108(GT8):1017-1039.

[8] Palmer, S.C., 1994. Stresses in storage tanks caused by differential settlement. Proceedings of the Institute of Mechanical Engineering, Part E. Journal of Process Mechanical Engineering, 208(E1):5-16.

[9] Palmer, S.C., Ceng, M.A., 1992. Structural effects of foundation tilt on storage tanks. Proceedings of the Institute of Mechanical Engineering, Part E. Journal of Process Mechanical Engineering, 206(E2):83-92.

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