Soil-Structure Interaction + Single Degree of Freedom

[yegoroff]

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 understand that this this de-coupled model neglects the SSI effect.

Hence, I am looking for an example, where SSI effect is studied on a SDoF.

If you could give me any recommendations on the modelling of the interface between the soil column and the SDoF or provide some examples (tcl scripts), your help would be much appreciated.

Many thanks!

[fmk]

how complicated are you planning on getting?

look at the following:
http://opensees.berkeley.edu/OpenSees/w ... amples.pdf

[yegoroff]

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 doesn't.

Here is the script of my SDoF model: http://pastebin.com/p3BNftxy (str2.tcl)
The input motion file is available here: http://pastebin.com/gVcwJyVC (STR_inc.out)

The input motion file contains 295 acceleration values with dT=0.01 at the point of interest after the analysis of my soil column.
However, after the SDoF displacement output file Node_disp.out (line 50) contains only 251 lines, while as Node_acc.out contains 289 lines, but still, not 295 as it should.

Could you please tell me what might be the reason for this problem?

Here is also the link to the folder with scripts: https://www.dropbox.com/sh/kti5veryrpfc ... hPx52wmOxa