TA project: ENINALS

Click here to read the final report of the ENINALS project.

A concise presentation of the project's aim and main outcomes is available in the Joint brochure of the SERIES TA facilities.

TITLE OF PROPOSAL: Experimental and Numerical Investigations of Nonlinearity in Soils Using Advanced Laboratory-scaled Models

HOST TA FACILITY: 
IFSTTAR, Nantes, France

TA AGREEMENT BETWEEN USERS AND FACILITY:
June 2010

STARTING DATE:
December 2011

END DATE:
March 2013

NO. OF USERS (researchers):
8

LEAD USER:
Gabriele Scarascia Mugnozza - Research Centre for Geological Risks (CE.RI.) - University of Rome “Sapienza” (Italy)

ADDITIONAL USERS:
Francesca Bozzano - University of Rome “Sapienza” (Italy)
Salvatore Martino - University of Rome “Sapienza” (Italy)
Fabian Bonilla - Institute for Radiological protection and Nuclear Safety (IRSN - France)
Celine Gélis - Institute for Radiological protection and Nuclear Safety (IRSN - France)
Peter Moczo - University Bratislava (Slovakia)
Jozef Kristek - University Bratislava (Slovakia)
Martin Galis - University Bratislava (Slovakia)



SUMMARY OF PROPOSED RESEARCH:

Sapienza University in Roma has developed a new approach of “equivalent signals” to an earthquake input   (LEMA_DES process by Lenti & Martino - 2009) whose vantages can be regarded in terms of:
i)  both kinetic and energetic equivalence with respect to the real reference seismic inputs;
ii) no pass-band filtering operations required;
iii) reduced time duration of the experiments due to the high time-compression of the derived equivalent signal (i.e. few seconds vs. some tens of seconds);
iv) analysis of the shaking-induced effects due to a frequency-controlled (i.e. up to 5 frequency values) forcing input.

The main goals of the experimental program in the centrifuge ruled by this transnational use agreement can be summarised in the following list:
1)  reliability of LEMA_DES derived multifrequencial signals for centrifuge-scaled modelling;
2)  analysis of seismically-induced strains (and/or vertical settlements) vs. stratigrafic features (i.e. presence, thickness and location of clay levels within the alluvial deposits);
3)  providing data for numerical modelling of non linearity by 1D-3C and 2D-3C approach of the response of soil columns;
4)  transposition of the obtained results to the Rome’s historical centre case history.

The drawing and table show the size, characteristics and soil models involved in the experimental program 

What's next

Series logo small   SERIES Concluding Workshop
  Joint with US-NEES "Earthquake Engineering Research Infrastructures

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