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You can define a uniaxial Viscous material, which will define your C parameter: uniaxialMaterial Viscous $matTag $C $alpha (http://opensees.berkeley.edu/wiki/index.php/Viscous_Material) Additionally, you can define your K parameter using an uniaxial Elastic material: uniaxialMaterial Elastic $matTag...

Hi, I am modelling a soil column (ElasticIsotropic and PressureDependMultiYield02 materials) with an attached SDOF to it. I attach the SDOF to the soil column using the following method: ---------------------------------------------------------------------------------------- set MidTopX [expr {int((...

Dear fmk,

could you please explain how this recorder works and what does it actually record? (11, 22, 12)?

I was struggling to find a good explanation on the wiki.

Hello, I am using a zeroLengthContact2D element in my script to simulate the friction between the base of the SDoF and the soil deposit. However, after running the script I end up with the following error: WARNING FullGenLinLapackSolver::solve() - lapack solver failed - 1 returned WARNING Accelerate...

You should read them horizontally and it would be good to provide the script with the file, which has got only one number in a row. Additionally, quite often you may want to apply the earthquake scaled to a certain peak ground acceleration, which cannot be done using the record handler from the exam...

I assume that the reason is in your analysis bit and truncation/convergence errors.
Try to play around with different types of integrators, tests, etc.
At least, that's what was suggested earlier with a similar type of error:
http://opensees.berkeley.edu/community/ ... =2&t=60632

The thing is that I don't know the theory well as I did not had any dynamics modules yet. So far I have made the model of my soil column and the model for SDoF. The next step will be combining these two together. While as the the soil models works (at least I get something I expected), the SDoF does...

Hello. I am currently writing my dissertation on the SSI effect and I have already modelled the soil and SDoF separately. At the moment, I am applying the earthquake accelerations at the bedrock, getting the accelerations at the ground level and applying them directly at the base of the SDoF. I unde...

Up.

All the links now seem to be broken.
It would be good if somebody could upload the latest version of Building Tcl somewhere.

Cheers.