Seismic characterization of rigid sites in the ITACA database by ambient vibration monitoring and geological surveys

The problem of seismic characterization of rock-mass or stiff-soil outcrops by the use of passive seismic prospecting techniques is discussed. Difficulties in the application of this kind of procedure in the presence of rugged morphology, high surface wave velocities and low ambient vibration powers, typical of stiff-soil/rock-mass sites are examined. A methodology to face these problems is here proposed, which is based on the strict synergy of detailed geologic surveys and application of robust seismic prospecting techniques, jointly considering single-station and multi-station tools. The application of this approach for the characterization of a number of sites belonging to the Italian Accelerometric Network is described, focusing on two representative case histories.

[1]  E. Tavarnelli,et al.  Geometry and kinematics of Triassic-to-Recent structures in the Northern-Central Apennines: a review and an original working hypothesis , 2009 .

[2]  Dario Albarello,et al.  Structure of an ambient vibration wavefield in the frequency range of engineering interest ([0.5, 20] Hz): insights from numerical modelling , 2011 .

[3]  Jamison H. Steidl,et al.  What is a reference site? , 1996, Bulletin of the Seismological Society of America.

[4]  Y Nakamura,et al.  A METHOD FOR DYNAMIC CHARACTERISTICS ESTIMATION OF SUBSURFACE USING MICROTREMOR ON THE GROUND SURFACE , 1989 .

[5]  Sebastiano Foti,et al.  Surface-wave analysis for building near-surface velocity models — Established approaches and new perspectives , 2010 .

[6]  Dario Albarello,et al.  On the seismic noise wavefield in a weakly dissipative layered Earth , 2009 .

[7]  Sesame Team,et al.  Sesame project - Deliverable D23.12 - WP12 - GUIDELINES FOR THE IMPLEMENTATION OF THE H/V SPECTRAL RATIO TECHNIQUE ON AMBIENT VIBRATIONS MEASUREMENTS, PROCESSING AND INTERPRETATION , 2004 .

[8]  Experimental Uncertainty on the Vs(z) Profile and Seismic Soil Classification , 2009 .

[9]  Robert O. Davis.  Effects of weathering on site response , 1995 .

[10]  M. Ohori,et al.  A Comparison of ESAC and FK Methods of Estimating Phase Velocity Using Arbitrarily Shaped Microtremor Arrays , 2002 .

[11]  Dario Albarello,et al.  Theoretical HVSR curves from full wavefield modelling of ambient vibrations in a weakly dissipative layered Earth , 2010 .

[12]  D. Rossi,et al.  Neogene-Quaternary tectonics and sedimentation in the Central Apennines , 2009 .

[13]  Cécile Cornou,et al.  Effects of Love Waves on Microtremor H/V Ratio , 2008 .

[14]  P. Leary,et al.  Fault zone trapped seismic waves , 1990, Bulletin of the Seismological Society of America.

[15]  Kohji Tokimatsu,et al.  S-Wave Velocity Profiling by Joint Inversion of Microtremor Dispersion Curve and Horizontal-to-Vertical (H/V) Spectrum , 2005 .

[16]  Dario Albarello,et al.  Combining genetic and linearized algorithms for a two-step joint inversion of Rayleigh wave dispersion and H/V spectral ratio curves , 2007 .

[17]  J. Vidale,et al.  Low-velocity fault-zone guided waves: Numerical investigations of trapping efficiency , 1996, Bulletin of the Seismological Society of America.

[18]  S. Parolai,et al.  S-wave Velocity Profiles for Earthquake Engineering Purposes for the Cologne Area (Germany) , 2006 .

[19]  Dario Albarello,et al.  Alternative interpretations of horizontal to vertical spectral ratios of ambient vibrations: new insights from theoretical modeling , 2010 .

[20]  Maria Rosaria Gallipoli,et al.  A critical review of 10 years of microtremor HVSR technique , 2001 .

[21]  F. Cotton,et al.  The nature of noise wavefield and its applications for site effects studies A literature review , 2006 .

[22]  Keith D. Koper,et al.  On the Composition of Earth's Short-Period Seismic Noise Field , 2010 .

[23]  H. Okada.  The Microtremor Survey Method , 2003 .

[24]  Dario Albarello,et al.  Statistical Analysis of Noise Horizontal-to-Vertical Spectral Ratios (HVSR) , 2005 .