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Re: Structural concrete chimney

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Junata,
 
        You might look at ASME STS-1-2000, Steel Stacks.  This publication contains a lot of useful information that would also apply to concrete stacks.
 
        Some useful points to consider are the following.
 
1.) In all likelihood wind considerations rather than earthquake considerations will govern the in service design.  The procedure outlined in the Vibration and Shock Handbook is the same as that required in the National Building Code of Canada
 
2.) The dynamic response of a flexible stack to variations in wind loading will probably result in wind loading between 1.5 and 2.0 times higher than wind applied to a rigid structure.  You must check for vortex shedding as a possible critical condition.
 
3.) In many or even most cases lifting/erection loading will govern stack wall thickness.  If possible you should get the lifting procedures from your client in advance or you may have to do some redesign.  In any event you will have to design or approve the lifting device attachments.
 
4.) Local buckling of thin wall tubes is likely to be critical.  Don't be too surprised if your maximum allowable bending stress for the stack shell is in the order of 9,000 to 12,000 p.s.i. I've seen stresses that low many times.  Also the yield stress, E, may reduce a lot due to high temperature.
 
5.) Don't forget to add a corrosion allowance to your wall thickness.  1/8 inch or 3 mm is fairly common for carbon steel.
 
        Hope this gives you enough to think about.
 
Regards,
 
H. Daryl Richardson
----- Original Message -----
From: Junata
Sent: Monday, November 21, 2005 8:45 PM
Subject: Structural concrete chimney

Hi all,
 
I am designing a 35m high chimney. I need some reffrence books to design this kind of structure. Anybody who has ever design it please share your experiences. Many thanks in advance
 
Best Regards
Junata