You're allowed to omit rotational DOFs at moment-free ends provided that you use the right stiffness factors and force recovery process. We do this to reduce the problem to a 3x3 instead of the 5x5 it would otherwise be.
We use an appendix from a published structural analysis book. The title doesn't come to mind, but any intermediate or advanced structural analysis text will have similar appendices.
![[SFM] Risky Recital](http://i.ytimg.com/vi/RzNkY1_Nk3o/mqdefault.jpg)
thanks a lot, this really helped me.
Thank you!!
Is there a reason you do not consider the rotation of the joints at the pinned supports as DOF 4 & 5?
You're allowed to omit rotational DOFs at moment-free ends provided that you use the right stiffness factors and force recovery process. We do this to reduce the problem to a 3x3 instead of the 5x5 it would otherwise be.
what kind of book do you use with the stiffness definitions?
We use an appendix from a published structural analysis book. The title doesn't come to mind, but any intermediate or advanced structural analysis text will have similar appendices.
I ran the same script in MathLab but I get 7.58....not sure why