DBPapers
DOI: 10.5593/sgem2012/s06.v2012

PRELIMINARY RESULTS OF DISPERSIVE WAVE VS MEASUREMENTS IN THE GRANITIC URBAN ENVIRONMENT OF PORTO, PORTUGAL

R. MOURA, R. UMARALIEV, G. DAL MORO, F. NORONHA
Wednesday 1 August 2012 by Libadmin2012

References: 12th International Multidisciplinary Scientific GeoConference, www.sgem.org, SGEM2012 Conference Proceedings/ ISSN 1314-2704, June 17-23, 2012, Vol. 2, 625 - 634 pp

ABSTRACT

The measurement of shear wave velocity (Vs) is an established approach in contributing
to earthquake site response. Currently, in terms of sensors, horizontal geophones have
been added as an option to the more common vertical geophones and thus being able to
measure Love waves. In terms of processing the most recent development has been the
possibility of joint inversion of data sets of different types (Rayleigh+Love,
Rayleigh+HVSR, Rayleigh+Refraction). Since some of most important earthquake site
response measurements have to be performed in urban environments this can pose a
problem to the in situ measurements due to the lower signal to noise ratio. Thus we aim
to show a case study of results of dispersive wave tests, made in the urban environment
of the city Porto in Northern Portugal, with the objective of contributing towards a
microzoning GIS map that we are currently engaged in improving. Porto is set in a
crystalline environment with a rock mass that is variably weathered thus our test results
will be compared with the geotechnical map of Porto.

Keywords: MASW, REMI, Seismic response, Vs30