Recording at common node of column and brace

[ashf]

hi,
I have a problem with recording base reaction.when I model a column by elastic element and a brace connecting it at base by concentrated plasticity spring,how I should record reaction at their common node?
when I record only reaction of spring,I get less strength,but I see strength degradation,
when I record reaction of both node,I get strange curve without any strength degradation and push curve is similar to below:
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can anybody help me?
thanks in advance

[selimgunay]

You should record the reaction at the fixed node.

[ashf]

thank you very much.
Do you mean the common node?as I said the curve is very strange!!in your opinion,above figure is reseanable?

[selimgunay]

I don't think it is the common node. It should be the fixed node. Do you have a sketch of your geometry and the nodes? Could you upload it? Even hand sketch is fine.

[ashf]

here is a summery of my sketch,specially in base nodes:
https://drive.google.com/file/d/0BxSrrh ... sp=sharing
thanks a lot

[selimgunay]

You should record the reactions at nodes 1000,1100, 1200, etc.