Seismic Load on Tank

[rquerin]

Hi,

I have a cylindrical tank (oriented horizontally on integral stands). I am trying to calculate the horizontal force imparted by the tank during a seismic event. Normally we only deal with buildings. Should I proceed with the same type of calculation as what we would do for a building or is there some quicker method that can be used? I am working in Ontario using our codes.

Normally we use the simplified method (V=vSIFW) type of equation. I'm not sure how to calculate the period etc.. for the tank supports.

Any help would be greatly appreciated.

R.Querin, P.Eng.

 

[ishvaaag]

I have found in the web this answer to related question:

http://revobiz.dyndns.org/group/seaint/2000c/msg01769.html

"See ASCE publication Guidlines for Seismic Evaluation and Design of Petrochemical Facilities. It will provide you some information on equipment of that type.
Regards,
Bob Hanson"

Please also browse links from search

http://www.google.es/search?q=seism...&oe=UTF-8&hl=es&btnG=Búsqueda+en+Google&meta=

 

[edba]

For horizontal vessel, the consideration on the support is cantilever with concentrated load at top.

Approximately we calculate period T (seconds) = 0.32sqrt(d)
where d=PL^3/3EI (deflection in inches)
P= Vertical Load (kips)
E= Modulus of Elasticity (ksi)
I= moment of Inertia (in^4)
L= height of cantilever (in)

Hope this help