Our tunnel team is trying to do some seismic analysis on our FE design models but not sure whether we are following the best procedure that works best with Plaxis or not and I would be very appreciated if give us some advise.To simulate seismic on our model, we apply displacements on X direction over the four boundaries of the FE model. Please let us know if it is the best way to do seismic analysis on Plaxis model?
pp Siamak Aghili
As long as you reach the same deformation difference from top to bottom. However, it is not over with that. This is very tricky process and even after 100ths of analyses, I can still find some problems in a procedure that works for 100 others. So, you should understand the analytical method, the expected deformation profile (both free field and with tunnel) and check the Plaxis with that. Assuming Plaxis will work well for this method is not a good idea.
Hi Berk,
As this is an accepted approach by authentic sources including FHWA and ITA, and also there are so many papers are referring to Plaxis results based on this approach.
It is brought in 13.5.1.1 Simplified Procedure for Ovaling Response of Circular Tunnels: https://www.fhwa.dot.gov/bridge/tunnel/pubs/nhi09010/tunnel_manual.pdf
Can you please provide us with your comments in more details?
Regards,
Siamak
Dear Siamak and Neil,
I noticed that you have also submitted a Service Request regarding this topic and my colleague has already responded.
Please check with the service request and reply if something is unclear or needs further clarification.