Civil Engineering (CE) Exam > Civil Engineering (CE) Questions > For a compression member having the same effe...
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For a compression member having the same effective length about any cross-sectional axis, the most preferred section from the point of view of strength is
- a)A box
- b)An I-section
- c)A circular tube
- d)A single angle
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
For a compression member having the same effective length about any cr...
Slenderness ratio, 
Lesser the value of λ (greater radius of gyration r), the column can take more load. Maximum radius of gyration is obtained when material is farthest from centroid. Therefore box section is best.
Lesser the value of λ (greater radius of gyration r), the column can take more load. Maximum radius of gyration is obtained when material is farthest from centroid. Therefore box section is best.
Most Upvoted Answer
For a compression member having the same effective length about any cr...
Compression Member Strength
Effective Length
Preferred Section
In conclusion, a box section is the most preferred section for a compression member having the same effective length about any cross-sectional axis due to its equal resistance to bending about both axes and higher resistance to buckling and bending compared to other sections.
- A compression member is a structural element that is designed to resist compressive forces.
- The strength of a compression member is dependent on its cross-sectional area and shape.
Effective Length
- The effective length of a compression member is the length of the member between points of zero moment.
- The effective length is different for different cross-sectional axes.
Preferred Section
- The most preferred section for a compression member having the same effective length about any cross-sectional axis is a box section.
- A box section has equal dimensions in both the x and y directions, resulting in an equal resistance to bending about both axes.
- Compared to other sections, such as an I-section, a circular tube, or a single angle, a box section provides a higher resistance to buckling and bending about both axes.
In conclusion, a box section is the most preferred section for a compression member having the same effective length about any cross-sectional axis due to its equal resistance to bending about both axes and higher resistance to buckling and bending compared to other sections.
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