The maximum bending moment due to a train of wheel loads on a simply supported girder
A. Always occurs at centre of span
B. Always occurs under a wheel load
C. Never occurs under a wheel load
D. None of the above
Answer: Option B
Solution (By Examveda Team)
1. Wheel Load: When a train of wheel loads moves over a simply supported girder, the bending moment changes depending on the position of the wheel loads.2. Influence Line: The influence line for bending moment indicates that the maximum bending moment occurs when the wheel load is at a specific point on the span.
3. Critical Position: For the maximum bending moment to occur, the critical position of the wheel load is generally at a distance from the support, calculated based on the span and the load distribution.
4. Conclusion: Hence, the maximum bending moment due to a train of wheel loads on a simply supported girder always occurs under a wheel load.
Therefore, the correct answer is Option B: Always occurs under a wheel load.
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Comments (1)
A. 5 mm less than the minimum clear distance between the main bars
B. 5 mm less than the minimum cover to the reinforcement
C. Smaller of A and B
D. Greater of A and B
The fixed support in a real beam becomes in the conjugate beam a
A. Roller support
B. Hinged support
C. Fixed support
D. Free end
A. The centre of gravity of the load system is midway between the centre of span and wheel load under consi-deration
B. The centre of span is midway between the centre of gravity of the load system and the wheel load under consideration
C. The wheel load under consideration is midway between the centre of span and the centre of gravity of the load system
D. None of the above
B