I have obviously misunderstood how to use this. I don't have any books on this subject, do you guys know any good ones?
Let me illustrate what I mean with a problem. Take a look at this beam:
The stiffness matrix for a beam, which only degree of freedom at the noeds is:
M(1)=EI/L(4*thetta(1)+2*thetta(2))
But at this beam, we see that there can't be any internal moment at (1). And we also see that end 2 is not free to rotate, the stiffness matrix then says that in order to have zero moment at (1) thetta(1) must be zero. But this is obviously wrong, because if we use the method of virtual work, we get a rotation there. So where am I thinking wrong?
I expect I might have used the stiffness matrix when I can't use it?, is this correct?, and why can't I use it here?
I would very much appreciate your help.
Stiffness Matrix for a Beam
Re: Please tell me how to use the stiffness matrix for a beam.
