2D Frame – 3-story, 3-bay Static Reversed-Cyclic

[wfwest]

hi fmk and silvia，
I want make a Static Reversed-Cyclic analysis of 3-story, 3-bay 2D Frame, but with different displacement history in three different nodes,I want make a displacement control of all three nodes at the same time. Is this posible?

[vesna]

What you are trying to do is possible.

1. define displacement histories for all three nodes using "timeSeries Path command" (one at a time) (http://opensees.berkeley.edu/wiki/index ... TimeSeries)
2. define 3 plain patterns (one for each timeSeries) and use "sp" command to constrain displacement of a node to one defined with timeSeries.
3. use LoadControl integrator
4. use Penalty constraints

[wfwest]

Thank you very much , vesna .I do as you said,but at last I do not get the right result,in my opinin ,I just move three node in the model,but there are a lot of nodes in the model,that is not enough.

Another question,can I use rigidDiaphragm in 2D frame,if can,please give me the scripts of it.

[wangbin_tongji]

You can use the equalDOF command to do the rigidDiaphragm in 2D frame.