Area of Steel in RCC Circular Water Tank Calculator

Area of Steel Reinforcement Formula:

\[ Ast = \frac{d \times h \times \frac{D}{2}}{σst} \]

Density of Water:

N/m³

Depth of Water:

Diameter of Tank:

Permissible Stress in Steel:

Area of Steel Reinforcement (m²):

1. What is Area of Steel in RCC Circular Water Tank?

Definition: This calculator determines the required area of steel reinforcement for circular reinforced concrete water tanks.

Purpose: It helps structural engineers and designers calculate the steel area needed to withstand hoop tension caused by water pressure.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ Ast = \frac{d \times h \times \frac{D}{2}}{σst} \]

Where:

\( Ast \) — Area of steel reinforcement (m²)
\( d \) — Density of water (N/m³)
\( h \) — Depth of water in tank (m)
\( D \) — Diameter of tank (m)
\( σst \) — Permissible compressive stress in steel (Pa)

Explanation: The formula calculates the steel area required to resist the hoop tension generated by water pressure in a circular tank.

3. Importance of Steel Area Calculation

Details: Proper steel reinforcement ensures the tank can withstand hydraulic pressure without cracking or failing, while maintaining structural integrity.

4. Using the Calculator

Tips: Enter water density (default 10000 N/m³), water depth, tank diameter, and permissible steel stress (default 100 MPa). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why is steel reinforcement needed in water tanks?
A: Steel reinforcement resists tensile forces caused by water pressure that concrete alone cannot withstand.

Q2: What's a typical permissible stress for steel?
A: Commonly 100 MPa (100,000,000 Pa) for mild steel, but varies based on steel grade and design codes.

Q3: How does tank diameter affect steel area?
A: Larger diameters create greater hoop tension, requiring more steel reinforcement.

Q4: Should I include a safety factor?
A: The permissible stress already includes safety factors according to design codes.

Q5: How is this different for rectangular tanks?
A: Rectangular tanks require different calculations for bending moments in walls and base slabs.