Seismosoft | Earthquake Engineering Solutions

After runing a time step analysis I receive a "range check error" when I want to access the analysis results in the post processor. This happens for Element Action Effects and for Global Resonse Paramaters. The model is a simple "stick model" of a concrete shear wall (40 elements and 41 nodes)

Please send us the model (through an email message), so that we may try to have a look at this issue.
In the meantime, you may try to access the results you need through the 'Step Output' module.

SeismoSoft Support

quote:Originally posted by janw

After runing a time step analysis I receive a "range check error" when I want to access the analysis results in the post processor. This happens for Element Action Effects and for Global Resonse Paramaters. The model is a simple "stick model" of a concrete shear wall (40 elements and 41 nodes)

We did not check the range check problems you reported, because we have detected a number of basic errors in your model. You should thus revise the latter, before anything else. Some examples of such modelling errors are:
- your meshing is unreasonably discretised (a good rule of thumb is to employ elements which length is at least equal to the width/height of the cross-section). For a wall system such as yours it suffices to use one, or maximum two elements per storey.
- your displ/rot convergence criteria is extremely relaxed, with a displacement tolerance of 10 cm and a rotation tolerance of 0.01 rad, thus rendering very much unreliable the solutions you are getting. If your model was not converging with the standard convergence criteria settings then you should try to find the error in the model, rather than relaxing the convergence criteria to unreliably large values.
- you should also employ a time-step that is equal to the dt of the accelerogram you are using (indeed you gain little in using an analysis dt of 0.00025 seconds when your accelerogram is defined with a dt of 0.01 seconds)
- the properties of your confined concrete seem a bit peculiar; extremely high values for confinement factor and for strain at peak stress. Are you sure about these?

In revising your model do make sure you follow more closely the suggestions found in the Help System (or the modelling options used in Wizard-created models).

SeismoSoft Support