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What exactly is the correct way to implement the "variable transient" version of the "analyze" command?

Is it the following?:

set ok [analyze 1 $dtMin $dtMax $Jd]

If so, what do $Jd, $dtMin, $dtMax represent?

~Simon

Yea I've tried that code you posted already (btw there's a typo in "analyze" in case you're using it for your work). Additionally, I've tried to deliberately focus on the region of displacements that was giving me trouble and fine tune the dU in that region, but I was unable to get farther...

Hello, I have a column discretized into about 10 elements. The bottom half uses one fiber section and the top half uses another fiber section. When performing pushover analysis using displacement control, I get the following error: WARNING - ForceBeamColumn3d::update - failed to get compatible eleme...

I used the set recTag 1 so that I can pinpoint this recorder and remove it later on in the analysis such that output can be written WITHOUT me having to close the OpenSees DOS window.

I think my problem was from my load pattern. Thanks for your input.

~Neal Simon

set recTag1 [recorder Node -file $eigFolder/MasterNodeDisp_Long.out -time -node 39 -dof 1 2 disp]
set recTag2 [recorder Node -file $eigFolder/Reactions_Long.out -node 1 81 82 91 -dof 1 2 3 reaction]

I want to also remark that I've tried integrator DisplacementControl $cntrlNode 1 $dU 30 $minDu with a very small maxU but I still get this situation where the displacements in the output are immediately larger than maxU. I stopped using the "30" in the command above because I thought the ...

When I use this integrator, am I supposed to be able to specify the final displacement value that the analysis reaches? In other words, if I have the following: set drift 0.001 set height 26.8333 set maxU [expr $height*$drift] set dU [expr $maxU/100] constraints Transformation numberer RCM system Ba...

What is the correct way of using the region and recorder commands to obtain the eigenvector values at certain nodes? I have the following code and it crashes opensees when I run it: # eigNodeList is a list containing the node numbers desired (eg [100 200 300 ...] ) region 1 -node $eigNodeList . . . ...

Yep. Got it Thanks!

I don't have the Units&Constants.tcl file

Try checking the vertical load you're putting on the structure and also the number of steps in gravity analysis? If it's not too large, maybe you can paste the code?

BEFORE you apply any loads, were you able to get the fundamental period for all 20 structures?

1) Period: If you do not apply any load on your model, the period will be the same in both cases. However, if you get the period, perform gravity analysis, and then get the period again, you will find (usually) that your period has increased (if you had pdelta on as geotransf) 2) Deformation: Simply...

I have two more questions/clarifications related to influence vectors. For a 3d model with z axis as vertical, I would like to perform RHA with uniform and bidirectional patterns. 1) For uniform pattern with direction specified in $dir, is the influence vector all ones in the direction $dir and zero...

What are you trying to do with these two models?