I have to find the Shear Force and Bending Moment diagrams for this problem. The lengths in the picture are 1.2m each and the peak force is 4kN/m and I calculated the support reactions to be:
Ma= 5.76kN.m (anticlockwise)
These are what I'm looking for but failed to do...
The Attempt at a Solution
I first section the beam 0<x<4
I got the 3.33x by using similar triangles; if triangle 1 is (1,2;4) then sectioned triangle should be (x;y) so therefore 4/1.2=y/x x=3.33x
this gave me Vx=-1.67x^3+4.8 which is wrong.
+Mx +.5x*3.33x*(x/3) -4.8x +5.76=0
which gets me Mx=-0.56x^3 +4.8x +5.76
The correct answers for this question are:
Mx=4.8x -(x^3/18) -5.76
I have a feeling I'm not using the triangle force correctly. Please advise.