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Lateral buckling of beam starts from top flange because of
- a)compression in top flange
- b)different nature of forces in top and bottom flange
- c)less value of shear force over cross-section
- d)None of these
Correct answer is option 'A'. Can you explain this answer?
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Lateral buckling of beam starts from top flange because ofa)compressio...
Compression in top flange:
Lateral buckling of a beam starts from the top flange because of compression in the top flange. When a load is applied to a beam, the top flange experiences compressive forces due to bending. This compression can cause the top flange to buckle laterally, especially if the beam is slender or has a high slenderness ratio.
Different nature of forces in top and bottom flange:
The top and bottom flanges of a beam experience different types of forces when subjected to bending. The top flange experiences compressive forces, while the bottom flange experiences tensile forces. This difference in forces can lead to lateral buckling starting from the top flange.
Less value of shear force over cross-section:
Shear forces do not directly cause lateral buckling in beams. Lateral buckling is primarily caused by compressive forces in the flanges due to bending. Shear forces can affect the overall behavior of the beam, but they do not directly contribute to lateral buckling starting from the top flange.
Therefore, the correct answer is option 'A' - compression in the top flange. Compressive forces in the top flange due to bending are the primary reason why lateral buckling of a beam starts from the top flange.
Lateral buckling of a beam starts from the top flange because of compression in the top flange. When a load is applied to a beam, the top flange experiences compressive forces due to bending. This compression can cause the top flange to buckle laterally, especially if the beam is slender or has a high slenderness ratio.
Different nature of forces in top and bottom flange:
The top and bottom flanges of a beam experience different types of forces when subjected to bending. The top flange experiences compressive forces, while the bottom flange experiences tensile forces. This difference in forces can lead to lateral buckling starting from the top flange.
Less value of shear force over cross-section:
Shear forces do not directly cause lateral buckling in beams. Lateral buckling is primarily caused by compressive forces in the flanges due to bending. Shear forces can affect the overall behavior of the beam, but they do not directly contribute to lateral buckling starting from the top flange.
Therefore, the correct answer is option 'A' - compression in the top flange. Compressive forces in the top flange due to bending are the primary reason why lateral buckling of a beam starts from the top flange.
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