Correct option is D
When a point load is applied at the shear center of a beam, it induces bending without twisting. Here’s why:
Key Outcome:
Pure Bending:
The beam will deflect in the direction of the applied load.
No torsional (twisting) effects occur because the shear center is the point where loads can be applied without causing rotation.
Shear Center Significance:
The shear center is the point through which a transverse load must pass to avoid twisting the beam.
For symmetric cross-sections (e.g., I-beams, rectangles), the shear center coincides with the centroid.
For asymmetric sections (e.g., channels, angles), the shear center lies elsewhere (often outside the cross-section).
