Help: Seismic design of storage tanks
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For seismic design, one should refer to GB50341 and API650 – both of which are quite confusing. EN1998-4 is even more difficult to understand. Does anyone have a simpler explanation?
GB50341 is the standard for oil tanks, while EN1998-4 applies to oil tanks for export. Ordinary storage tanks do not need to be considered.
Not only oil tanks, but also flat-roof arch tanks designed in accordance with or with reference to GB50341 must be designed for seismic resistance. Look at Appendix D.2, the design guidelines – there are three main points to consider: 1. Axial compressive stress on the tank wall (this is likely related primarily to the thickness of the tank wall at the bottom) ； 2. Seismic shaking amplitude of the liquid storage (this determines the maximum liquid level) ； 3. Finally, it’s anchored. Use LPEC’s PVDESKTOP or another program to calculate it, and the result will be clear at a glance.