FEM stiffness matrix for simple frame exploiting symmetry

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JohnnyR
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Hello. I need help with the following problem:
Unavngivet.jpg
Unavngivet1.jpg

I don't know where to start. I know that the frame can be split up into one symmetric part and one symmetric+asymmetric part but i forgot the theory and rules on translation and axis etc.
I hope someone can help as I have to hand in the assignment soon and my grade depends on it.

Best regards
Johnny
 

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Sorry about your memory loss, but the policy at PF is that you must show some effort at a solution before you can receive help.