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Modelling of frictional soil damping in finite element analysis
Van Baars, Stefan
2011In The Second International Symposium on Computational Geomechanic
Peer reviewed
 

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Abstract :
[en] In soil dynamics, the soil is often described as a viscous material. In a viscous material however, the dissipated energy is assumed to be proportional to the wave frequency, which is absolutely not applicable to soils. It is therefore better to use a concept of damping based on dry particle friction. A non-viscous model based on this concept results in a damping ratio that becomes constant for small deformations for both sand and clay, and is also independent of frequency or shear strain amplitude. This behaviour corresponds with laboratory measurements and requires only one damping parameter which can be obtained from laboratory tests. This model is implemented in Plaxis as a User-Defined Soil Model to analyse the problem of a strip footing subjected to a dynamic load. The initial results are rather remarkable. . For example, a Power Spectral Density plot of the velocities shows that not all frequencies seem to be damped equally and at some distance the input frequency is not even present.
Disciplines :
Civil engineering
Author, co-author :
Van Baars, Stefan ;  University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit
Language :
English
Title :
Modelling of frictional soil damping in finite element analysis
Publication date :
April 2011
Event name :
The Second International Symposium on Computational Geomechanic
Event place :
Dubrovnik, Croatia
Event date :
April 2011
Main work title :
The Second International Symposium on Computational Geomechanic
ISBN/EAN :
978-960-98750-1-1
Peer reviewed :
Peer reviewed
Available on ORBilu :
since 16 January 2014

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