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TECHNICAL PAPERS

Behavior of Localized Bottom Bulge in Aboveground Oil Storage Tanks Under Liquid Pressure

[+] Author and Article Information
Shoichi Yoshida

Department of Mechanical Engineering, Kochi National College of Technology, Kochi 783-8508, Japan e-mail: yoshida@me.kochi-ct.ac.jp

J. Pressure Vessel Technol 124(1), 59-65 (Aug 31, 2001) (7 pages) doi:10.1115/1.1426406 History: Received June 28, 2000; Revised August 31, 2001
Copyright © 2002 by ASME
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References

Figures

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Typical layout of oil storage tank bottom plate
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Localized bottom bulge remote from shell in oil storage tank—(a) plan view, (b) section through bulge(A-A)
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Process of localized bottom bulge formation—(a) end of construction, (b) liquid pressure p1, (c) liquid pressure p2(p1<p2), (d) internal inspection
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Profile of localized bottom bulge
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Calculation flow at each incremental step
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Procedure of mesh division
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Displacement at the bulged center: B=100 mm,R=1000 mm
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Displacement at the bulged center: R=1000 mm,t=8 mm
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Remaining length of bulge: B=100 mm,R=1000 mm
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Remaining length of bulge: R=1000 mm,t=8 mm
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Equivalent plastic strain at the bulged center on lower surface: B=100 mm,R=1000 mm
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Equivalent plastic strain at the bulged center on lower surface: R=1000 mm,t=8 mm
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Deformation: B=100 mm,R=1000 mm,t=8 mm
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Longitudinal bending moment: B=100 mm,R=1000 mm,t=8 mm
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Plastic region: B=100 mm,R=1000 mm,t=12 mm,P=15,000 mmAq

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