Thanks,
_Ig G8)k; XeZv%` ? Some points you may concern:
j l7e6#zu I7[+:?2 1) M-C model, undrained condition, effective stress analysis:
Y-,#3%bT;; In this case, the plasticity can be predicted as usual;
Sfvi|kZX f$H"|Mb e 2)M-C model, undrained condition, total stress analysis:
O#k ?c } @j^qT-0M In this case, there is not effective stress calculation due to no pore pressure generated.
c)Y I3G$ $s)
^zm~ The total stress analysis plasticity occurs as soon as the total stresses reach the failure
gu"Agct4 pwu5Fxn) criterium while with an effective stresses analysis plasticity occurs when the effective stresses
VvoJ85 g5T~%t5lo reach the failure criterium.
%!eK"DKG^ xJO[pT v The latter is of course more realistic; only the effective stresses determine plasticity, not the water pressures.
x "N,oDs G`)I _uO In other words, using total stress analysis is only correct when the calculation is elastic. But this case is not very often in reality.
Y
%<B, 3 if `/LJsa Suggestion: Try to use effective stress analysis when it is undrained condition (typically, there is option for this in PLAXIS).
[ 此贴被mano在2007-08-31 16:34重新编辑 ]
