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Static Engineering - Beam Question

I am completing a work pack as preparation for an exam coming up. The questions have moved onto beams and the question is very dissimilar to the examples I've been given and I am having trouble progressing, and unsure of any answers I produce. The question is separated into 5 parts.

I have linked the question in the picture below.

http://farm6.staticflickr.com/5486/12302826523_75bdcecabe_c.jpg

Any help would be greatly appreciated. Thanks

Solution Preview

Length of the beam, L = 2+1+5+2 = 10 m

(a)
Force equation:
R1 + R2 = 5*10 + 10 + 20
=> R1 + R2 = 80 ...(1)

Moment of forces about R1 (anti-clockwise +ve):
R2*6 - 20*(1+5+2) - 5*(1+5+2)*(1+5+2)/2 - 10*1 + 5*2*2/2= 0
=> R2*6 = 320
=> R2 = 320/6 = 160/3 kN = 53.33 kN --Answer

Hence, from Equation (1):
R1 = 80 - 160/3 = 80/3 = 26.67 kN --Answer

(b)
From left end:
x = 0 to x = 2m (left side), shear force,
F = -5*x
At x = 0, F = 0
at x = 2m, F = -10 kN

x = 2 (right) to x = (2+1) = 3m (left):
F = ...

Solution Summary

A beam problem, describing shear force and bending moment estimation at different points corresponding to U.d.l. and point loads.

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