Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/1945
DC Field | Value | Language |
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dc.contributor.authorall | Mucciarelli, M.; DiSGG Università della Baslicata | en |
dc.contributor.authorall | Gallipoli, M. R.; DiSGG Università della Baslicata | en |
dc.date.accessioned | 2006-12-07T11:14:02Z | en |
dc.date.available | 2006-12-07T11:14:02Z | en |
dc.date.issued | 2006-09 | en |
dc.identifier.uri | http://hdl.handle.net/2122/1945 | en |
dc.description.abstract | During 5 microzonation projects in Italy, we had access to 46 estimates of Vs30 (30 obtained with down-hole or cross-hole measurements, plus 10 velocity profiles obtained with surface techniques, 6 sites were considered A without drilling, being rock sites). In all the sites we performed HVNR measurements to verify the presence of a resonant frequency and in 34 sites we installed seismic instrumentation to record earthquakes and estimate site amplification using HVSR. It is important to note that we did not pre-selected the sites, but just followed the requests of two Regional governments (Marche and Basilicata) to study a set of localities that were chosen for reasons other than geo-morphological ones (previous earthquakes, pilot studies, design of new infrastructures). The comparison between site seismic amplification and Vs30 showed that this last parameter is not a good proxy of observed site effects. The reason why in Italy Vs30 does not provide satisfactory estimates is linked to peculiar geological settings that are widespread in our country. The main problems encountered are underestimations by Vs30 at sites with velocity inversions and overestimations on deep basins. Vs30 seems to work fine only if a site has a strictly monotonic velocity profile increasing with depth and a strong impedance contrast in the first dozen meters. Further data will be available thanks to an ongoing national project funded by the Civil Defence Department that is focusing on Vs30 estimates in the presence of velocity inversions, fractured rock masses, landslides and karst areas. | en |
dc.format.extent | 401228 bytes | en |
dc.format.mimetype | application/pdf | en |
dc.language.iso | English | en |
dc.relation.ispartof | First European Conference on Earthquake Engineering and Seismology | en |
dc.subject | Vs30 | en |
dc.subject | Site Amplifcation | en |
dc.title | Comparison between VS30 and other estimates of site amplification in Italy | en |
dc.type | Conference paper | en |
dc.description.status | Published | en |
dc.subject.INGV | 04. Solid Earth::04.06. Seismology::04.06.04. Ground motion | en |
dc.description.ConferenceLocation | Geneva | en |
dc.relation.references | Anderson J. G., Y. Lee, Y. Zeng and S. Day (1996). Control of Strong Motion by the Upper 30 Meters, Bull. Seism. Soc. Am., Vol. 86, 1749-1759. Borcherdt R. D. (1992). Simplified site classes and empirical amplification factors for site-dependent code provisions, in Proc. NCEER, SEAOC, BSSC Workshop on Site Response during Earthquakes and Seismic Code Provisions, November 18-20, University of Southern California, Los Angeles, California. Di Giacomo D., M. R. Gallipoli, M. Mucciarelli, S. Parolai, and S. M. Richwalski (2005). Analysis and modeling of HVSR in the presence of a velocity inversion: the case of Venosa, Italy, Bull. Seism. Soc. Am. 95, 2364-2372. Martino S., A. Minutolo, A. Paciello, A. Rovelli, G. Scarascia Mugnozza and V. Verrubbi (2006). Evidence of amplification effects in fault zone related to rock mass jointing, Natural Hazard, in press. Park D. and Y.M.A. Hashash (2004). Probabilistic seismic hazard analysis with non linear site effects in the Mississippi embayment, Proc. 13th World Conf. Earthq. Eng, Vancouver, CD-Rom Edition, paper n. 1549. Stewart J. P., A. H Liu. and Y. Choi (2003). Amplification Factors for Spectral Acceleration in Tectonically Active Regions, Bull. Seism. Soc. Am., 93, 332–352. Wald L. A. and J. Mori (2000). Evaluation of Methods for Estimating Linear Site-Response Amplifications in the Los Angeles Region, Bull. Seism. Soc. Am, 90, S32–S42 | en |
dc.description.fulltext | open | en |
dc.contributor.author | Mucciarelli, M. | en |
dc.contributor.author | Gallipoli, M. R. | en |
dc.contributor.department | DiSGG Università della Baslicata | en |
dc.contributor.department | DiSGG Università della Baslicata | en |
item.openairetype | Conference paper | - |
item.cerifentitytype | Publications | - |
item.languageiso639-1 | en | - |
item.grantfulltext | open | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | ituto di Metodologie Avanzate di Analisi Ambientale, CNR, Tito Scalo (PZ), Italy | - |
crisitem.classification.parent | 04. Solid Earth | - |
Appears in Collections: | Conference materials |
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Vs30 ECEES.pdf | 391.82 kB | Adobe PDF | View/Open |
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