It is not a mattter of phreatic surface only, but the load of the flood water exerts excess pore pressure in the dam (assuming ,at least, part of the dam is saturated)
If you have earth dam composed of low permeability soils and this dam is exposed to flood , it should shear under undrained case. However, in most practice earth dams and levees are usually analyzed considering undrained shear only when they are under rapid drawdown case. Why the undrained...
If you have earth dam containing low permeability soil layer and this dam is exposed to flood , it should shear under undrained case. However, in most practice earth dams and levees are usually analyzed considering undrained shear only when they are under rapid drawdown case. Why the undrained...
- Is anyone aware of on-line spreadsheets doing the calssical geotechnical computations: bearing capacity, consolidation, earth pressure, mass-volume relationships, and other classical geotechnical formulas.
I am very clear with the underlying formulations and the philosphy on which these...
Sorry . I want to say :
Regarding space, the load taken by the skeleton will DECREASE by moving to the bottom of the layer (far from the drainage surface). I attach a graph demonstrating what I am talking about...
"as you said, because of zero pore pressure BC, fluid squeezes out from the surface. If it happens, then fluid does not take any external load. Is it true?? "
-Yes but only at the surface on which pore pressure is zero
For example, if you you have a layer with thickness H allowed to drain from...
-Undrained case means that there is no flow of fluid within the porous medium (insignificant consolidation/volumetric strain at a point). This happens, for example, when the permeability is low. As you may know also when Poission ratio is 0.5 (or close to 0.5), one will also have no volumetric...
As I answered you in the previous post. This may be due to low permeability. Try to increase it and see what happens.
Regarding your question: I am wondering how to control Zero Vol Flux in porous medium.
This requires going to solution control and changing the pre-set convergence, accurecy, and...
-Go to message file and see details on the error which you are getting and report it to us.
I suggest that you first consider full bonding (cancel the interface initially) and see if the model converges.
Modelling a porous medium usually requires special attention.
Some general guidelines may...
You have to define intial pressure (use Keyword and insert value of the initial pressure in the input file), otherwise the strength will be zero.
Porous elasticity implies that you should use SOIL analysis and use Displacemenet_Pore Pressure Element, I forgot it is identity in ABAQUS. (I do not...
