Dear Amir
We've already done the f.e. modelling. We are looking for a closed-form
solution - similar to the one derived by Dr. Al-Tabbaa in her Ph.D. thesis.
Thanks.
Jitendra
-----Original Message-----
From: Amir Rahim [mailto:[log in to unmask]]
Sent: Friday, March 03, 2000 11:07 PM
To: Jitendrapal S Sharma (Asst Prof)
Cc: [log in to unmask]
Subject: Re: Radial consolidation - Biot's theory
Hello Jitendra,
You can model the problem as axi-symmetric by including the filter in the
finite element mesh. The centre line of the filter remains fixed in the
radial direction. You can apply zero pore pressure fixities to the centre
line. I guess you can chose an appropriate permeability value to represent
the porous nature of the filter.
I don't think you really need a 3D or Fourier series solution.
regards,
Amir
http://www.crispconsortium.com
The CRISP Consortium Ltd
Rm 407B, South Bank University
202 Wandsworth Rd, London SW8 2JZ
Work phone and fax 020 7815 7189
Mobile 0771 8880943
----- Original Message -----
From: "Jitendrapal S Sharma (Asst Prof)" <[log in to unmask]>
To: <[log in to unmask]>
Cc: <[log in to unmask]>
Sent: Friday, March 03, 2000 12:54 AM
Subject: RE: Radial consolidation - Biot's theory
> Dear Andrew
>
> Thanks very much for responding to my message.
>
> The vertical drain at the centre is a geosynthetic filter bag of circular
> cross section and is filled with uniformly graded fine sand. Application
of
> rigid surcharge at the top would result in bulging of the drain to
> accomodate the settlement. Hence the need for a solution that does not
> impose zero radial strain condition on the inner boundary.
>
> I am aware of the use of Fourier analysis to solve quasi-axisymmetric
> problems where only the loading does not follow axis symmetry. However, I
> don't quite understand the need for this in back-analysing our experiments
> in which both the geometry and the loading follow axis symmetry. The
radial
> strains at the inner boundary (at any vertical cross-section) are going to
> be the same along the circumference.
>
> Thank you. With best wishes,
>
> Jitendra
>
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|