Thanks,
yMd< <:Ap |+aUy^ Some points you may concern:
xpO'.xEs {\-9^RL 1) M-C model, undrained condition, effective stress analysis:
Sb/`a~q ^ In this case, the plasticity can be predicted as usual;
WLy%| {/ ZNKopA(=|% 2)M-C model, undrained condition, total stress analysis:
mRNA ,* Q| 6lp In this case, there is not effective stress calculation due to no pore pressure generated.
~OE1Sd:2 nB &[ R The total stress analysis plasticity occurs as soon as the total stresses reach the failure
^?~WIS <27:O,I criterium while with an effective stresses analysis plasticity occurs when the effective stresses
>, 9R :X( j@Ta\a-,x reach the failure criterium.
qDV t \C& [BQ\ The latter is of course more realistic; only the effective stresses determine plasticity, not the water pressures.
YcmLc)a7 zUIh^hbFf In other words, using total stress analysis is only correct when the calculation is elastic. But this case is not very often in reality.
xpU7ZY <Wwcd8d 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 ]
