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RE: Seismic Base Shear - Tank With Supported Bottom

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Title: Seismic Base Shear - Tank With Supported Bottom
Are you responsible only for the tank itself ( reservoir ) ? or your
engineering is involving the ' whole system', including the foundations,
i.e. the piles and raft ? I dare to mention this because, in order to
properly assess the seismic case for the piles, it seems you should
run the 'whole system', in which case the shear at tank base level
may come as a byproduct in this analysis. 
If you are using piles, you have a weak soil, in surface and intermediate
strata, and this means not only a poor vertical bearing support, but also
soft lateral conditions, which call for the type of analysis mentioned 
-----Mensaje original-----
De: Klarkowski, Kevin <Kevin.Klarkowski(--nospam--at)>
Para: 'seaint(--nospam--at)' <seaint(--nospam--at)>
Fecha: Miércoles, 24 de Julio de 2002 03:38 p.m.
Asunto: Seismic Base Shear - Tank With Supported Bottom

When calculating the seismic base shear for a tank with supported bottom per the Rigid Structures Criteria of UBC section 1634.3, should the weight of the foundation(pile cap) be included in W when the foundation is pile-supported?

Kevin J. Klarkowski
Jacobs - Green Bay

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