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Longitudinal shear occurs due to(a) light load on beam(b) bending of beam(c) twisting of beam(d) does not occurThe question was posed to me in unit test.My question is taken from Shear Strength of Beams topic in division Design of Beams of Design of Steel Structures

Answer» RIGHT answer is (b) bending of beam

For EXPLANATION I would say: Longitudinal or horizontal shear occurs due to bending of beam. The fibers aboveshorten in length and those below neutral axis ELONGATE under SAGGING bending moments. Therefore, the fibers tend to slip over each other and the effect is maximum at the neutral axis. The TENDENCY to slip is resisted by shear strength of the material.


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