1. What is Shear Buckling Coefficient?

Definition: The shear buckling coefficient C is a geometrical constant that depends on the h/tw ratio (web depth to thickness ratio) of a structural member.

Purpose: It's used to determine the allowable shear stress in flexural members of bridges and other steel structures.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( C \) — Shear buckling coefficient (dimensionless)
• \( \tau \) — Shear stress for flexural members (Pa)
• \( f_y \) — Yield strength of steel (Pa)

Explanation: The coefficient is calculated by multiplying the shear stress by 3 and dividing by the yield strength of the steel.

3. Importance of Shear Buckling Coefficient

Details: Proper calculation of this coefficient is essential for designing safe and efficient steel bridge members that resist shear buckling.

4. Using the Calculator

Tips: Enter the shear stress and yield strength of steel. Both values must be > 0. The ±5% indicates the typical tolerance range for these values.

5. Frequently Asked Questions (FAQ)

Q1: What's the typical range for shear buckling coefficient?
A: For most bridge applications, C typically ranges between 0.8 and 1.5 depending on the section geometry.

Q2: Why is there a ±5% tolerance shown?
A: This accounts for typical variations in material properties and stress calculations in real-world applications.

Q3: How does web slenderness affect the coefficient?
A: More slender webs (higher h/tw ratios) generally result in lower buckling coefficients.

Q4: What units should I use for input values?
A: Use consistent units (both in Pa, MPa, or psi) for shear stress and yield strength.

Q5: Does this consider post-buckling strength?
A: No, this is the elastic buckling coefficient. Additional calculations are needed for post-buckling behavior.

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