Résumé
Remerciements
Résumé étendu
Notation
General introduction

I Basic concepts and data processing

1 Linear wave propagation

• 1.1 Wave propagation in linear elastic and visco-elastic media
• 1.2 Wave propagation in a linear visco-elastic layered model
• 1.3 Borehole-site response and implication for inversion purposes
• 1.4 Computational approach
• 1.5 Sensitivity analysis

2 KiK-net database: data-selection, signal processing and site-response calculations

• 2.1 Data selection and signal processing
• 2.2 Empirical site-response calculations
• 2.3 Computation of the empirical site response
• 2.4 Definition of the soil and linear site-response proxy parameters
• 2.5 Definition of the seismic motion intensity parameters
• 2.6 Conclusions

II Analysis of empirical seismic site response variability

3 Inter-site site-response variability

• 3.1 Introduction
• 3.2 Selection of the KiK-net sites with 1-D site configuration
• 3.3 Variability of the Vs profiles and site responses according to Vs30 only
• 3.4 On the use of additional parameters to Vs30
• 3.5 Illustration of three KiK-net sites
• 3.6 Analyses of the Vs profile and BFSRemp variabilities of the 1-D selected sites
• 3.7 Conclusion and discussion

4 Inter-event site-response variability

• 4.1 Introduction
• 4.2 Elements of soil non-linear behaviour
• 4.3 Quantification of the non-linear effects
• 4.4 Statistical analyses of the event/ site parameters
• 4.5 Optimal parameters to assess soil non-linearity
• 4.6 Conclusions

III Inversion of the borehole transfer function

5 The simulated annealing downhill simplex hybrid global inverse algorithm

• 5.1 Simulated annealing
• 5.2 Downhill simplex method
• 5.3 The hybrid method
• 5.4 Inversions on synthetic cases

6 Inversion of empirical data

• 6.1 Introduction
• 6.2 Description of the selected KiK-net sites
• 6.3 Inversion of linear data
• 6.4 Inversion of non-linear data
• 6.5 discussion on the inversion of non-linear data
• 6.6 Conclusion

Conclusions
Conclusion and perspectives
References

• A Earthquake locations at sites FKSH12, FKSH14, KSRH10 and MYGH04
• B Illustration of the down-going wave effect on the numerical borehole site responses
• C Picking the fundamental resonance frequency
  • C.1 Methodology
  • C.2 Comparison of the f0
  • C.3 Conclusion and discussion
  • D Characteristics of KiK-net sites that have recorded at least two earthquakes with PGAs at depth >50 cm/s2