GNGTS 2017 - 36° Convegno Nazionale

360 GNGTS 2017 S essione 2.2 2) � ����� ��� ��������� �������� a rough but effective estimate of V S,30 can be obtained straightforwardly from the values of the experimental dispersion curve with no need for the formal solution of the inverse problem aimed at estimating the shear wave velocity profile. Indeed an approximation of V S,30 is given by the value of the experimental Rayleigh wave phase velocity (fundamental mode) for a wavelength equal to about 40-45 m. Finally, for 1D numerical simulations of seismic ground response, it is suggested to consider a set of possible solutions obtained with global search approaches, rather than a single best fit solution, in order to quantify the implications of solution non-uniqueness. Aknowledgements The InterPACIFIC Project has been financed by the Research & Development Program SIGMA funded by EdF, Areva, CEA and ENEL and by CASHIMA project, funded by CEA, ILL and ITER. Partial funding for participants from the Politecnico di Torino was provided by the ReLUIS 3 project, sponsored by the Italian Civil Protection Agency. Partial funding for participants from the University of Texas was provided by U.S. National Science Foundation (NSF) grant CMMI-1261775. However, any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the funding agencies. References Foti S., Hollender F., Garofalo F., Albarello D., Asten M., Bard P.Y., Comina C., Cornou C., Cox B.R., Di Giulio G., Forbriger T., Hayashi K., Lunedei E., Martin A., Mercerat D., M. Ohrnberger, Poggi V., Renalier F., Sicilia D., Socco V.; 2017: Guidelines for the good practice of surface wave analysis: a product of the Interpacific project . Bulletin of Earthquake Engineering. Online first. Doi:10.1007/s10518-017-0206-7 Garofalo F., Foti S., Hollender F., Bard P.Y., Cornou C., Cox B.R., Ohrnberger M., Sicilia D., Asten M., Di Giulio G., Forbriger T., Guillier B., Hayashi K., Martin A., Matsushima S., Mercerat D., Poggi V., Yamanaka H.; 2016a: InterPACIFIC project: Comparison of invasive and non-invasive methods for seismic site characterization. Part I: Intra-comparison of surface wave methods . Soil Dynamics and Earthquake Engineering, 82 , 222-240. Garofalo F., Foti S., Hollender F., Bard P.Y., Cornou C., Cox B.R., Dechamp A., Ohrnberger M., Perron V., Sicilia D., Teague D., Vergniault C.; 2016b: InterPACIFIC project: Comparison of invasive and non-invasive methods for seismic site characterization. Part II: Inter-comparison between surface-wave and borehole methods , Soil Dynamics and Earthquake Engineering, 82 , 241-254. Fig. 3 - Comparison of VS,30 values from invasive and non- invasive methods with uncertainty bars were available (Garofalo et al. , 2016b).