Finite-element analysis of liquid-storage tank foundations using settlement difference as boundary condition

Abstract

Considered comprehensively with the friction between structure and soil, study was carried out to simulate the interaction between bottom plate and foundation with contact element. New modelling method for stress calculation of large liquid-storage tank was established. For it, average settlement difference of the foundations was utilized as boundary condition, replacing the existing bedding value and elastic modulus, which are difficult to be measured in practical engineering. The peak stress over fillet weld area on the bottom plate, which was derived by the finite-element analysis modelling method based on settlement difference, agreed well with the measured values. It shows that other than accurately calculating the stress of bottom plate, this method can also carry out real-time monitoring and forecast the operational life span of large liquid-storage tank.

Keywords

large liquid-storage tank finite-element method stress analysis foundation settlement

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References

Yamamoto

Kawano

‘Investigation of cause for a tank accident’

Bull. Int. Assoc. Shell Spat. Struct. 1865 (1977): 23–39

Zhu

‘Stress analysis and effective protection of fillet welding for crude tank bottom plate (in Chinese)’

Petro-Chem. Equip. Technol. 211 (2000): 18–21

American Petroleum Institute. API standard 650, Steel tanks for oil storage, Appendix B, 10th edition, 2004

‘To estimate settlement of foundation by Winkler model (in Chinese)’

Shanghai Geol. 701 (1999): 22–24

Chen

Z. P.

Duan

Y. Y.

Shen

J. M.

Jiang

J. L.

‘A simplified method for calculating the stress of large storage tank wall’

Proc. IMechE, Part E: J. Process Mechanical Engineering 221 (E3) 2007: 119-127 DOI: 10.1243/09544089JPME125

T. Y.

‘More accurate method devised for tank-bottom annular plate design’

J. Oil Gas 9421 (1996): 81–83

T. Y.

Liu

G. R.

‘Comparison of design methods for tank-bottom annular plate and concrete ring wall’

Int. J. Press. Vessels Pip. 773 (2000): 511–517

Palmer

S. C.

‘Structural effects of foundation tilt on storage tanks’

Proc. IMechE, Part E: J. Process Mechanical Engineering 206 E2 (1992): 83–92

Palmer

S. C.

‘Stresses in storage tanks caused by differential settlement’

Proc. IMechE, Part E: J. Process Mechanical Engineering 208 E1 (1994): 5–16