Temperature and Shrinkage Horizontal and Vertical Reinforcement
Temperature and Shrinkage Horizontal and Vertical Reinforcement
(OP)
I am designing a ring wall foundation for an above ground crude oil storage tank and i am using PIP STE03350 as a guide. I clearly understand Hoop Tension (and have been able to find that) and from example 2 in PIP, i do not necessarily have to design for Twist moment since my tank has the same specifications and environmental factors as that example. My challenge is: PIP does not exactly state the formula for vertical and horizontal minimum steel for temperature and shrinkage and API 650 does not state it precisely too... can anyone pls give me a detailed formula and steps of how to determine the minimum horizontal and vertical reinforcement for this? Urgent answers would be appreciated..





RE: Temperature and Shrinkage Horizontal and Vertical Reinforcement
These are only T&S for buildings, and NOT directly applicable to API, which may require higher minimums. If you are reinforcing for hoop tension, then you should already have vertical reinforcement to tie the "hoops" together, so unless a specific minimum reinforcement ratio is identified, you should be above the minimum. Is there a pad under the tank, or will the tank be built/installed on fill inside your wall? (I've seen them both ways)
RE: Temperature and Shrinkage Horizontal and Vertical Reinforcement
Mike McCann
MMC Engineering
RE: Temperature and Shrinkage Horizontal and Vertical Reinforcement
1) The tank is to be built directly on the fill (crushed stone - sharp sand + an asphaltic coating for water resistance) in the ring wall. No pads would be used.
2) The location where the tank is to be installed is south-south Nigeria. The soil in the site is primarily clayey.
3) The tank is a 10000Metric tonne tank with R:9250mm, H:7500mm, b: 450mm, h:1500mm, drw: 1000mm, L: 150mm. fOr reinforcement is 60Ksi.
Tx,from ur 2nd paragraph, r u implying that there are cases where you dont need to design for T&S because your As(hoops) already covers for it? Pls clarify.
Thanks
RE: Temperature and Shrinkage Horizontal and Vertical Reinforcement
RE: Temperature and Shrinkage Horizontal and Vertical Reinforcement
Thanks
RE: Temperature and Shrinkage Horizontal and Vertical Reinforcement