Diameter of Anchor Bolt Circle Calculator

Diameter of Anchor Bolt Circle Formula:

\[ D_{bc} = \frac{4 \times F_{wind} \times (H - c)}{N \times P_{load}} \]

Total Wind Force acting on Vessel:

Height of Vessel above Foundation:

Clearance between Vessel Bottom and Foundation:

Number of Brackets:

Maximum Compressive Load on Remote Bracket:

Diameter of Anchor Bolt Circle (m):

1. What is a Diameter of Anchor Bolt Circle Calculator?

Definition: This calculator determines the diameter of the bolt circle needed to securely anchor a vessel based on wind forces, vessel height, and bracket specifications.

Purpose: It helps engineers and designers ensure proper anchoring of vessels to withstand wind loads and maintain structural integrity.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ D_{bc} = \frac{4 \times F_{wind} \times (H - c)}{N \times P_{load}} \]

Where:

\( D_{bc} \) — Diameter of anchor bolt circle (meters)
\( F_{wind} \) — Total wind force acting on vessel (Newtons)
\( H \) — Height of vessel above foundation (meters)
\( c \) — Clearance between vessel bottom and foundation (meters)
\( N \) — Number of brackets
\( P_{load} \) — Maximum compressive load on remote bracket (Newtons)

Explanation: The formula calculates the required bolt circle diameter to distribute wind forces evenly across all brackets while considering the vessel's height and clearance.

3. Importance of Anchor Bolt Circle Calculation

Details: Proper calculation ensures vessel stability under wind loads, prevents overturning, and maintains structural safety margins.

4. Using the Calculator

Tips: Enter all required parameters with appropriate units. The ±5% indicates typical tolerance ranges for these calculations.

5. Frequently Asked Questions (FAQ)

Q1: Why is wind force important in this calculation?
A: Wind force creates overturning moments that the anchor bolts must resist to prevent vessel failure.

Q2: How does vessel height affect the bolt circle diameter?
A: Taller vessels create larger moments from wind forces, requiring larger bolt circles for stability.

Q3: What's the significance of the clearance value?
A: Clearance affects the moment arm of wind forces acting on the vessel.

Q4: How many brackets are typically used?
A: Most vessels use 4-8 brackets, but the exact number depends on vessel size and load requirements.

Q5: What safety factors should be considered?
A: Engineers typically apply safety factors of 1.5-2.0 to the calculated diameter for additional safety margin.