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thanks for the hand-calculation comparison. You applied a “quadPlane” load, that distributes the forces “by centroid”, hence it will not generate trapezoidal loads. That’s why you see these peak loads, that are correct in a “centroid”-like distribution (in your hand calculation, Lx1=0).
If by “reversed” you mean that you have to press “Reverse” once the loading plane has been drawn, this happen because you have “Normal to the plane” option active: this means that, for vertical loading, you have to draw the plane in counterclockwise way in order to have it directed on -Z.
If this is not the case, please clarify what you mean for “reversed”.Yes, it seems that you left the loadcases in the model set for LC1 also for non-linear cases. In Analysis settings, click on LC1, remove PDelta effects check and delete all the case you find in TH loadcases. Then re-enable Pdelta effects and store the changes.
There’ll automatic controls in future, thanks for reporting us.This is a custom elements on our own code, no reference for that, it’ll work only inside Designer.
To use outside it, replace the element with a linear spring.We cannot reproduce the problem, all the conversion runs fine starting from any combination of lenght and force units.
ActiveTcl 8.6.9 is ok, this is apparently due to the distribution of OpenSees that came along with some tcl init files.
DIscard then and use another built of OpenSees, like: https://github.com/eesd-epfl/OpenSees/blob/master/Win64/bin/OpenSees.exeThanks for the file. We cannot reproduce the error, because analysis with OS runs fine in our pc.
I can advice to place opensees.exe in the installation folder and ActiveTcl 8.6 must be installed and added to path (see https://www.activestate.com/products/tcl/downloads/).Sorry, no support for OpenSees solver. If the springs are not part of NonLinear module, please attach the model.
Hello,
it mainly depends on type of seismic isolator. If damping is provided, you can use dashpot (see https://www.nextfem.it/it/a-survey-on-non-linear-analysis-in-nextfem-designer-part-1/).
If bilinear behaviour and damping are present, a bilinear spring with dashpot could be used.