www.www.buonovino.com

[sandeep_nimbalkar]

�
Dear all
i am sandeep Nimbalkar doing my dissertation on "Effect of Soil

Structure Interaction on High Rise Building founded on Soft Soil

subject to Seismic Forces" I want to model the founding soil. We have

SAP 2000 and STAAD 2004 available in our college. Is any one of you

have idea @ How to model the founding soil & how to define its Dynamic

Properties in Software.

ThankYou

Sandeep Nimbalkar
M. E. (Structures)
Mobile: 9422547167

Posted via Email

[rsm]

Dear Sandeep:

You can either user soil springs to model Winkler type foundation or else
you can also use 3DSOLID elements to model soil.

Hemant Kr
----- Original Message -----
Message From
To:
Sent: Friday, December 30, 2005 4:35 PM
Subject: @ Modelling of Soil

[prof.arc]

Dear Mr. Sandeep Nimbalkar,
The actual problem is too complicated.
However, in practice the soil is sometimes replaced by a set of
springs - springs in all 6 DOF if you are modelling the superstructure
by beam elements.
The expressions used are based on studies on Machine Foundations.
If you are in Mumbai, the BARC and IIT-Bombay libraries have excellant
国米出版物对土壤结构action.
Not only soil springs but soil damping is also to be considered and
modal damping must be derived. It is not an easy problem even with
gross assumptions of soil as spring-dashpot system. There is a
controversy associated with how much soil mass to be lumped or not.
Just blindly using packaged software, will lead you nowhere. You must
read literature and note the assumptions.
This is not to discourage you but to inform you that if you are doing
research, you must readw what has been attempted so far.
On the contray, if you are designing, anything goes. There is a draft
Code [may be already finalised] on industrial structures which you may
use for design but not for research.
Sincerely
Prof. ARC