Structural Analysis - Study Mode
[#61] The maximum bending moment due to a train of wheel loads on a simply supported girder
Correct Answer
(B) Always occurs under a wheel load
Explanation
Solution: 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.
[#62] When a uniformly distributed load, shorter than the span of the girder, moves from left to right, then the conditions for maximum bending moment at a section is that
Correct Answer
(D) The load position should be such that the section divides the load in the same ratio as it divides the span
[#63] In the displacement method of structural analysis, the basic unknowns are
Correct Answer
(A) Displacements
[#64] If the specified thickness of a footing is 100 cm, the depth of the form work may be tolerated from
Correct Answer
(D) -5 mm to +5 mm
[#65] For the stability of a structural part, the weight or anchorage should be
Correct Answer
(C) Sum of (A) and (B)