How to generate reversed cyclic sine function

[jjeon34]

I want to use reversed cyclic sine function with different peak values every loading cycle for static cyclic pushover analysis.
I already had the displacement values as input motion (text file). The loading is applied at the top of the column.
But I couldn't find this kind of example in OpenSees manual and Forum.

Please let me know how to use kind of sine wave in OpenSees when doing static cyclic pushover analysis.

Thank you.

[vesna]

I'm not sure I understand your question well. Do you have a text file of the motion that you want to apply at the top of the column?

[jjeon34]

Yes, vesna

I have a text file for static cyclic analysis.
In the my case, the loading pattern [displacement vs. time (or frequency)] at top of column is irregular (kind of sine curve), so I made a text file.

[vesna]

Let's say that the file name is Disp.out

Define the load pattern like this:

set Disp "Series -dt $dt -filePath Disp.out"

pattern Plain 10 $Disp {
sp $nodeTag $dofTag 1.0
}

and use load control integrator.