hy,
I need to determine the ratio between effective pressure (sigma_N to interface) and passive pressure (maximum resistence). For passive pressure i do not know how to calculate with plaxis (take sigma_v and calculate to hand maybe?) . Did someone ever resolve this situation?
Thanks a lot.
PP
Dear Pasquale,
Unfortunately you didn't give any information on the kind of situation you want to apply this. But generally both active and passive pressure is taken from the normal stress of the interface on active or passive side respectively.
With kind regards,
Dennis Waterman
Dear Dennis, a following question came up to my mind. What's the difference between taking the normal stress from the Interface and taking it from a very close cross-section (cross-section total normal stress)? Do you recommend each method for a specific case or goal?
Dear Mohamad,
For a cross section the stresses are determined by interpolation of the stresses in the soil elements where the cross section passes through. For the interfaces we actually directly calculate the stresses, hence interface stresses are more accurate than cross section stresses.
Best regards,