circular raft design
circular raft design
(OP)
I am designing a raft foundation for a 10m diameter by 7m high tank. can any one point me in the right diresction with regards to books or literature on circular raft foundation designs
Thanks
Thanks






RE: circular raft design
Section 9-5 of Foundation Analysis and Design by Joseph Bowles has an example of this type of footing. They do most of their analysis and design assuming an "equivalent" square foundation. But, in my experience that is typical design practice.
RE: circular raft design
Pick a cross section, sum moments and forces about the cross section. A table of integrals is handy.
RE: circular raft design
RE: circular raft design
With a tank of the dimensions mentioned, there probably won't be any uplift unless seismic loads are very high, and that simplies the calculations considerably.
RE: circular raft design
As per books and references you could also read up design principles in "foundation design' by Tezaghi and Peck. Bowles Joseph also has a discussion on the Bossineq method too.
From experience I want to advice that you model this in some structural analysis program if you got access to one and pay a good attention to the steel detailing at the corners and the centre, stresses are critical here.
Lexim
RE: circular raft design
Where will the tank be built? What is the depth of frost penetration? What will the tank hold...water, oil or other?
Is the tank made of concrete or steel?
Is it entirely above grade or partially buried? Is there likely to be groundwater higher than the raft?
Is the roof clear spanning or will you have interior columns?
BA
RE: circular raft design
Mike McCann
MMC Engineering
RE: circular raft design
The tank will hold water and is a steel tank which is designed according to API 650. the roof is clear spanning and there is no danger of frost or ground water effect on site.
Okey1
RE: circular raft design
http://www
A very useful reference was provided by AeolianTexan toward the end of the thread which you may find as illuminating as I did.
BA