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Large dia water tank

 
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er_spsvasan
SEFI Member
SEFI Member


Joined: 26 Jan 2003
Posts: 16

PostPosted: Sun Feb 08, 2004 3:01 pm    Post subject: Large dia water tank Reply with quote

Hello B.J.Gupta,

As already discussed, provision of vertical expansion joints in large circular water tanks will destroy the hoop action. Sliding joints at top and bottom of the wall can relieve the thermal stresses; but I do not know how practical they will be. Hence, I think that, in the case of large circular tanks we do have to consider thermal stresses.

Apart from hoop stresses, the following effect also will have to be considered. Temperatures on the outer face and on the inner face of the circular wall will be different and the effect of this thermal gradient has to be considered in the design. For a lucid discussion on this aspect, you may refer "Concrete Water Towers, Bunkers, Silos & Other Elevated Structures" by W.S.Gray & G.P.Manning published by Cement and Concrete Association, UK.

The thermal movement of the roof should also be considered in the design of the walls.

Hope this information is useful

Regards

S.P.Srinivasan

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