## ANR DEBATE

## DEvelopment of Broadband Acceleration Time histories for Engineers

Développement des accelerogrammes larges bandes pour les ingénieurs

## Summary

The proper way to reduce seismic risk is to construct earthquake resistant infrastructures. As infrastructure becomes more sophisticated and complex, such a system has become increasingly mechanically complex and nonlinear. In the project DEBATE we approach this problem from three perspectives: (1) The development of improved methods for the simulation of deterministic strong ground motion, which will be combined with a stochastic simulation at higher frequencies, (2) the nonlinear soil behaviour on strong ground motion, considering the reliability and variety of signals (broadband acceleration time histories) as well as the consistency with our knowledge from the real data, and (3) the recent large earthquakes with acquired strong motion data in Japan and in Chile.

- 440 k€ funded from the Natural Risk program of ANR call 2008.
- 42 months (from 1st Feb 2009 to 31 Jul 2012)
- DEBATE patners participate in Euroseis Test (Volvi basin, Greece).
## Parteners - Participants

- BRGM

- Hideo Aochi ... Coordination. Model setting. Wave propagation simulation.
- Mickael Delatre ... Development of stochastic Green function method.
- Ariane Ducellier ... Wave propagation simulation.
- Florent de Martin ... Site characterization. Wave propagation simulation.
- Evelyne Foerster ... Expert on non-linsear soil response simulation.
- CNRS - ENS Paris

- Raul Madariaga ... Characterization of source parameters.
- Maria Lancieri (postdoc) ... Characterization of source parameters.
- Géodynamique & Structure

- Alain Pecker ... Non-linear soil response simulation.
- IRSN

- Fabian Bonilla ... Non-linear soil response simulation.
- Céline Gelis ... Wave propagation simulation. Non-linear soil response simulation.
- Olga Ktenidou (postdoc) ... Wave propagation simulation. Non-linear soil response simulation.
## Working Packages

- Seismological description for broadband input ground motion
- Non-linear effect of foundation according to different input ground motion
- Real field examples

- 2007 Tocopilla (Chile) earthquake (Mw7.8)
- 2007 Niigata Chuetsu-oki (Japan) earthquake (Mw6.3)
## Publication List

- Aochi, H., A. Ducellier, F. Dupros, M. Delatre, T. Ulrich, F. de Martin and M. Yoshimi, Finite difference simulations of the seismic wave propagaion for the 2007 Mw6.6 Niigata-ken Chuetsu-Oki earthquake: Validity of models and reliable input ground motion in the near field, accepted in Pure appl. Geophys., 2011.
- Aochi, H. and F. Dupros, MPI-OpenMP hybrid simulations using boundary integral equation and finite difference methods for earthquake dynamics and wave propagation: Application to the 2007 Niigata Chuetsu-Oki earthquake (Mw6.6), Procedia Comptuter Science, 4, 1496-1505, doi:10.1016/j.procs.2011.04.162, 2011.
- Aochi, H. and A. Kato, Dynamic rupture of cross-cutting faults: A possible rupture process for the 2007 Mw6.6 Niigata-ken Chuetsu-oki earthquake, J. Geophys. Res., 115, B05310, doi :10.1029/2009JB006556, 2010.
- Lancieri, M. and R. Madariaga, Fast determination of magnitude for the Tocopilla(Chile) earthquake, and its aftershocks, Bull Seismol. Soc. Am., 101, 447-463, doi: 1785/01201000045, 2011.
- Madariaga, R., Vigny, Ch., Métois, M., and Campos, J., Central Chile finally breaks Science 238, 181-182, 2010.
- Ruiz, S., Kausel, E., Campos, J., Saragoni, G. R. and Madariaga, R.., Identification of High Frequency Pulses from Earthquake Asperities Along Chilean Subduction Zone Using Strong Motion. Pure Appl. geophys., doi:10.1007/s00024-010-0117-, 2010.
## Other documents and references

- will come soon.

still under construction on 2011/12/01