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Total Horizontal Shear Formula:
Definition: This is the shear force between the maximum positive moment at each end of steel beams or between the point of contra flexure in a continuous beam.
Purpose: It helps structural engineers determine the shear forces in beams and ensure proper reinforcement design.
The calculator uses the formula:
Where:
Explanation: The product of reinforcement area and yield stress is divided by 2 to calculate the horizontal shear.
Details: Proper shear calculation ensures structural integrity and prevents failure in beam-column joints and continuous beams.
Tips: Enter the area of longitudinal reinforcement (m²) and specified minimum yield stress (Pa). All values must be > 0. The ±5% indicates acceptable tolerance range.
Q1: What is the point of contraflexure?
A: It's the point in a beam where the bending moment changes sign from positive to negative or vice versa.
Q2: Why is there a ±5% tolerance?
A: This accounts for material variability and measurement uncertainties in real-world applications.
Q3: How do I determine the area of longitudinal reinforcement?
A: This is calculated based on the number and size of reinforcing bars in the cross-section.
Q4: What's a typical yield stress for reinforcement?
A: Common values range from 400-500 MPa for standard reinforcement steel.
Q5: Does this calculation include safety factors?
A: No, appropriate safety factors should be applied separately according to design codes.