Question

The center of mass is at 137.4mm above the lowest point on the drawing.

The moment of inertia is 4.1488 104mm

N 17 kN

1. = 12h:N

M -33kNm

120 mm 3

Calculate the beam shear.

4.1488 104mm
N 17 kN
1. = 12h:N
M -33kNm
120 mm 3
0 0
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Answer #1

Ans) We know,

Beam shear = M y / Ix

where, M = moment

y = distance of centroid from lowest point

Ix = moment of Inertia

Putting values,

   Beam shear = 33 x 106 x 137.4 / 4.1488 x 104

= 109.29 kN/mm2

Longitudinal shear force at bottom of beam = F b2h2 t2 / 4 Ix

= 109290 x 1202 x 2002 x 32 / 4 x 4.1488 x 104

= 3414 kN/m

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