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The shear center in standard rolled channel section is-
  • a)
    At the CG of the section
  • b)
    On the middle line and away from the CG but within flange width.
  • c)
    On the horizontal line passing through and away from the CG beyond the web
  • d)
    None of the above
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
The shear center in standard rolled channel section is-a)At the CG of...
The shear center is always located on the symmetric axis.
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The shear center in standard rolled channel section is-a)At the CG of...
The Shear Center in Standard Rolled Channel Section

The shear center in a standard rolled channel section is located on the horizontal line passing through and away from the centroidal axis, beyond the web. This means that it is neither at the centroid of the section nor on the middle line and within the flange width.

Explanation:
To understand the concept of shear center, we need to first understand the concept of shear force. Shear force is the force that acts parallel to a surface, causing one part of the surface to slide or shear relative to an adjacent part. In structural engineering, shear force is an important consideration as it affects the stability and strength of a structure.

When a load is applied to a structural member, such as a channel section, shear forces are induced. These shear forces cause the section to deform, resulting in bending moments and shear stresses. The shear center is the point in the cross-section where the shear forces can be applied without causing any additional bending moments.

Significance of Shear Center:
The shear center is a critical point in a structural member as it determines the load paths and the distribution of shear forces. It is essential to know the location of the shear center for the accurate analysis and design of structures.

Location of Shear Center in Standard Rolled Channel Section:
In a standard rolled channel section, the shear center is located on the horizontal line passing through and away from the centroidal axis, beyond the web. This means that it is not at the centroid of the section (option A) and not on the middle line within the flange width (option B).

The reason for the shear center being away from the centroidal axis is due to the asymmetry of the channel section. The flanges and the web of the channel section have different dimensions and contribute differently to the resistance against shear forces. As a result, the shear center is shifted away from the centroidal axis.

Conclusion:
In summary, the shear center in a standard rolled channel section is located on the horizontal line passing through and away from the centroidal axis, beyond the web. This is because of the asymmetry of the section, which causes the shear center to be shifted away from the centroidal axis. Understanding the location of the shear center is crucial for the accurate analysis and design of structures using channel sections.
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The shear center in standard rolled channel section is-a)At the CG of the sectionb)On the middle line and away from the CG but within flange width.c)On the horizontal line passing through and away from the CG beyond the webd)None of the aboveCorrect answer is option 'C'. Can you explain this answer?
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