7 step design procedure for RCC Circular Water Tank
In our previous article, we discussed some important theory and formulas required in the design procedure of Circular Water Tank.
We will now move on with the stepwise design procedure for Water tank design.
Determine the design constants such as σcbc, σct, m, σst
σcbc = permissible compressive stress in concrete
σct = permissible tensile stress in concrete
m = modular ratio
σst = permissible compressive stress in steel
- Dimensions of the tank
- Volume of the tank
- Area of the tank (by assuming its depth)
Hoop tension, Ht = d x h x D/2
Area of steel, Ast = d x h x D/2 σst
Thickness of the wall of water tank
Ht = [1000t + (m – 1)Ast] x σct
Reduction in hoop steel. The steel calculated in step 3 is for 1m height from the bottom of the water tank. The pressure of water decreases at the top. Hence, steel can be reduced by keeping the same thickness of wall.
Distribution steel (vertically placed)
Ast = 0.3% of Ag
Floor of the tank
Provide 0.3% of Ag both ways
We will also do some good examples for the circular water tank in our succeeding articles.