What is the best damping type in dynamic modeling by Flac2D using mohr coulomb model?

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Francisco Alonso Flores

Dear Bouraoui,

Rayleigh damping used in models FLAC gives very acceptable results compared with SHAKE91. The key in Rayleigh damping is used to determine the frequency.

Madhavi Latha Gali

Depends on the problem you are solving. I have used Rayleigh damping successfully for studying the seismic response of retaining walls & liquefaction related numerical studies, using FLAC. See the attached paper

Zakaria Bouraoui

thank you Ouassim Rahmouni ,Francisco alonso Flores,Madhavi Latha Gali

for your awesome answers im using a mhor coulomb model for studying the seismic response of retaining walls

what is the damping ration used by you and how we can estimate it ?

thank you dears friend again