- #1
bigu01
- 57
- 0
Homework Statement
Draw the shear and moment diagram for the beam
Homework Equations
∑Fy=0 ∑M=0; ΔV=∫w(x)dx ΔM=∫V dx
The Attempt at a Solution
I am firstly finding the external forces as any statics problem(Ay=13.5kN upwards, By=13.5kN upwards).Then I found the equations of the lines for the two loading forces.The first one is w(x)=-3xand the second one w(x)=3x-18.To find the V, I am integrating these equations and from what I get I drew the graph of V,of course jumping 13.5kN upwards in both sides.For V(x) I get 13.5-(3x^2)/2 for the first loading and (3x^2)/2-18x for the second, but when drawing the moment diagram for the second part at x=6 I do not get moment zero as it should be, my equation there is x^3/2-9x^2.What have I done wrong?