Steel Water Tank Seismic Anchorage

[minorchord2000]

I have designed a 80,000 gallon water steel tank and I need some guidance on how to the anchor the tank to a concrete slab. There will 12 equally spaced anchors around a 20'-6" diameter tank. Seismic forces govern the overturning moment. The max uplift force is about 7 kips. I was thinking of using angle clips with 1" diameter anchors (ASTM F1554 Grade 36). Can anyone guide me to a good rational method for designing the clip angle?

 

[JStephen]

Typical procedure is to use anchor bolt chairs rather than clips. One design procedure for them is included in this publication:

https://shop.steel.org/p/186/steel-...eries-design-of-plate-structures-volumes-i-ii

Usually, the chairs would be designed and detailed by the tank fabricator as part of their shop drawings.

 

[MJCronin]

Here is another very detailed methodology:

http://proceedings.asmedigitalcollection.asme.org/proceeding.aspx?articleid=2590378

An older method is here:

https://www.scribd.com/doc/255157098/AISI-Anchor-Chair-Design

Also see the Pressure Vessel Handbook:

MJCronin
Sr. Process Engineer

 

[JStephen]

Note that the second link above is the document that I referenced (I referenced a newer version, but am assuming that part is relatively unchanged.)