1. What is Negative Shear Force?

Negative shear force in beams represents the internal force that tends to cause one part of the beam to slide relative to the adjacent part in the opposite direction to the applied load. It is calculated as the negative integral of the distributed load along the beam's length.

2. How Does the Calculator Work?

The calculator uses the negative shear force equation:

Where:

• \( V \) — Negative shear force (N)
• \( w \) — Distributed load (N/m)
• \( x \) — Distance along the beam (m)

Explanation: For a constant distributed load, the equation simplifies to V = -w*x, where the negative sign indicates the direction of the shear force.

3. Importance of Shear Force Calculation

Details: Accurate shear force calculation is crucial for structural analysis, beam design, and ensuring structural integrity under various loading conditions.

4. Using the Calculator

Tips: Enter distributed load in N/m and distance in meters. All values must be valid positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What does negative shear force indicate?
A: Negative shear force indicates that the internal force acts in the opposite direction to the conventional positive shear direction, typically downward on the right face of a beam section.

Q2: How is shear force related to bending moment?
A: Shear force is the derivative of bending moment with respect to distance along the beam (V = dM/dx).

Q3: When is shear force maximum in a beam?
A: Shear force is typically maximum at supports for simply supported beams and at points where concentrated loads are applied.

Q4: What are the units of shear force?
A: Shear force is measured in Newtons (N) in the SI system.

Q5: How does distributed load affect shear force?
A: Distributed load causes a linear variation in shear force along the beam length, with the slope equal to the load intensity.