record force in any station of a element

[vehy]

Hi everybody. How can I record output in special station of a element? e.g. I want to record moment in middle of the element

[fmk]

you can only record where there are integration points.

[vehy]

you mean I should define node in middle of element, that means 2 node with 1 element between them converted to 3 node with 2 element?

[fmk]

if there is no integration point there then yes.

depending on the integration scheme and the number of points there may be a gauss pt at the location, e.g. if force-beam column and using default integration if you specify 3,5,7,..
integration points there is one in the middle of the beam:

http://opensees.berkeley.edu/WebSVN/fil ... ration.cpp

[vehy]

but it is not possible to define integration point in elasticbeamcolumn element

[fmk]

nope. sorry though automatically you were dealing with a nonlinear beam column element.

good new is that you don't need to record anything in the middle. it's an ELASTIC beam, you can determine everything knowing end forces. it's simple static equilibrium after all.