FEM for Space frame one beam is Pinned at its Local Y axis 1

[Penpendrum]

Hello Everyone.. I have a problem for the space frame direct stiffness method .. If one of the beam is pinned at one end(eg. @ local y axis only), does this mean that the stiffness matrix of this beam would be written differently from other beam elements..

I am currently making a software and I tried to make some modifications on the stiffness matrix for the beam that is pined at one end.. it seemed to work.. but I would like to make sure if my solution is correct..because there may be a better way.

see the figure below for clarifications

 

[IDS]

Have a look at:

http://people.duke.edu/~hpgavin/cee421/frame-element.pdf

It should give you what you want.

By the way, we aren't supposed to put the same question in more than one thread.

Doug Jenkins
Interactive Design Services

http://newtonexcelbach.wordpress.com/

 

[Penpendrum]

Thank you IDS. It did gave me what I want. Sorry for being 2 desperate to post 2 same thread