UNCERTAINTIES ON VS PROFILES AND SITE RESPONSE AT A VERTICAL STRONG MOTION ARRAY

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Published: Jul 27, 2016
DOI: https://doi.org/10.12681/bgsg.11865
Keywords:
interferometry stress-strain seismic noise prospecting
K. Makra
Institute of Engineering Seismology and Earthquake Engineering EPPO-ITSAK
D. Raptakis
Aristotle University of Thessaloniki, Department of Civil Engineering
Abstract

Παρουσιάζουμε μια λεπτομερή μελέτη πολλών VS προσομοιωμάτων στη θέση TST του νπειραματικού πεδίου Euroseistest. Επωφελούμαστε από 62 διαθέσιμα προσομοιώματα που προέκυψαν στην ίδια θέση από μετρήσεις και μεθόδους όπως σεισμική συμβολομετρία, ανάλυση τάσεων-παραμορφώσεων και προσομοίωσης ανόπτησης σε σεισμικές καταγραφές, συμβατικές σεισμικές διασκοπήσεις (αντιστροφή επιφανειακών κυμάτων, crosshole and downhole), και σεισμικό θόρυβο σε δίκτυα. Όλα τα προσομοιώματα ομαδοποιήθηκαν σύμφωνα με τις τεχνικές ανάλυσης σε 5 μέσους όρους, Τα αποτελέσματα έδειξαν ότι διαφέρουν μεταξύ τους καθώς εξαρτώνται από τις υποθέσεις κάθε τεχνικής. Οι διαφοροποιήσεις τους σε σχέση με τον μέσο όρο τους, αν και μικρές, είναι σημαντικές στις κατακόρυφες ασυνέχειες που ορίζουν τους σχηματισμούς διαφορετικής δυστμησίας, εισάγοντας σχετική αβεβαιότητα. Αποτελέσματα της σεισμικής απόκρισης με βάση τα προσομοιώματα έδειξαν ανάλογη αβεβαιότητα με σημαντική υποεκτίμηση της ενίσχυσης, γεγονός που πρέπει να διαχειρίζεται με προσοχή στον αντισεισμικό σχεδιασμό των κατασκευών.

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  • Seismology
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References
Abrahamson, N., Atkinson, G., Boore, D., Bozorgnia, Y., Campbell, K., Chiou, B., Idriss, I.M.,
Silver, W. and Youngs, R., 2008. Comparison of the NGA ground-motion relations, Earthq.
Spectra, 24, 45-66.
Aki, K., 1957. Space and time spectra of stationary stochastic waves with special reference to
microtremors, Bull. Earthq. Res. Inst., 35, 415-456.
Aki, K., 1988. Local site effects on strong ground motion, in Earthquake Engineering and Soil
Dynamics II, Proc. Am. Soc. Civil Eng. Geotech. Eng. Div. Specialty Conf., June 27-30, 1988,
Park City, Utah, 103-155.
Apostolidis, P., 2002. Determination of the soil structure using microtremors. Application to the
estimation of the dynamic properties and the geometry of the soil formations at Thessaloniki
city, PhD Thesis (in Greek), Aristotle University of Thessaloniki, Greece.
Bard, P.Y., 1994. Effects of surface geology on ground motion: recent results and remaining issues.
In: Proc. 10th Eur. Conf. on Earthq. Engrg, Vienna, August-September 1994, Duma, G., ed.,
, 305-324.
Boore, D.M., 2003. Simulation of ground motion using the stochastic method, Pure Appl. Geophys.,
(3-4), 635-676, doi: 10.1007/ PL00012553.
Boore, D.M., 2004. Can site response be predicted? J. Earthq. Engrg., 8, Special Iss. 1, 1-41.
Borcherdt, R.D., 1970. Effects of local geology on ground motion near San Francisco Bay, Bull.
Seismol. Soc. Am., 60, 29-61.
Brown, L.T., Boore, D.M. and Stokoe, K.H., 2002. Comparison of shear-wave slowness profiles at
ten strong-motion sites from noninvasive SASW measurements and measurements made in
boreholes, Bull. Seismol. Soc. Am., 92, 3116-33.
Chávez-García, F.J., Raptakis, D., Makra, K. and Pitilakis, K., 2000. Site effect at Euroseistest-II.
Results from 2D numerical modeling and comparison with observations, Soil Dyn. Earthq.
Engrg., 19(1), 23-39.
Chávez-García, F.J. and Raptakis, D., 2008. Inversion of soil structure and analysis of the seismic
wavefield from a vertical array, Proc. 14th WCEE, October 12-17, Beijing, China.
Chávez-García, F.J., 2011. Site effects due to topography and to soft soil layers: Progress made and
pending issues. A personal perspective, Proc. 5th ICEGE, January 10-13, Santiago, Chile.
Chávez-García, F.J., Manakou, M. and Raptakis, D., 2014. Subsoil structure and site effects: A
comparison between results from SPAC and HVSR in sites of complex geology, Soil
Dynamics and Earthquake Engineering, Volume, 57, 133-142.
Douglas, J., Gehl, P., Bonilla, L.F., Scotti, O., Régnier, J., Duval, A.M. and Bertrand, E., 2009.
Making the most of available site information for empirical ground-motion prediction, Bull.
Seism. Soc. Am., 99, 1502-1520.
Elgamal, A.W., Zcghal, M., Tang, H.T. and Stepp, J.C., 1995. Evaluation of low-strain site
characteristics using the Lotung seismic array, J. Geotech. Engrg., 121(4), 350-362.
Hannemann, K., Papazachos, C., Ohrnberger, M., Savvaidis, A., Anthymidis, M. and Lontsi, A.M.,
Three-dimensional shallow structure from high-frequency ambient noise tomography:
New results for the Mygdonia basin-Euroseistest area, northern Greece, J. Geophys. Res.
Solid. Earth, 119, doi: 10.1002/2013JB010914.
Jongmans, D., Pitilakis, K., Demanet, D., Raptakis, D., Riepl, J., Horrent, C., Tsokas, G., Lontzetidis,
K. and Bard, P.-Y., 1998. EURO-SEISTEST: determination of the geological structure of the
Volvi graben and validation of the basin response, Bull. Seism. Soc. Am., 88, 473-87.
Joyner, W.B., Warrick, R.E. and Fumal, T.E., 1981. The effect of quaternary alluvium on strong
ground motion in the Coyote Lake, California, earthquake of 1979, Bull. Seismol. Soc. Am.,
(4), 1333-1349.
Kennett, B.L.N., 1983. Seismic Wave Propagation in Stratified Media. Cambridge University Press,
Cambridge, 1983.
Kudo, K., Kanno, T., Okada, H., Sasatani, T., Morikawa, N., Apostolidis, P., Pitilakis, K., Raptakis,
D., Takahasi, M., Ling, S., Nagumo, H., Irikura, K., Higashi, S. and Yoshida, K., 2002. Swave
velocity structure at EUROSEISTE, Volvi, Greece, determined by the spatial autocorrelation
method applied for array records of microtremors, Proc. Earthq. Engrg. Symp.,
November, Japan, 15-28.
Manakou, M.V., Raptakis, D.G., Chávez-García, F.J., Apostolidis, P.I. and Pitilakis, K.D., 2010. 3D
soil structure of the Mygdonian basin for site response analysis, Soil Dyn. and Earthq.
Engrg., 30(11), 1198-1211.
Okada, H., 1998. Microtremors as an exploration method: Geo-exploration Handbook, Vol. 2,
Society of Exploration Geophysicists of Japan.
Pitilakis, K., Roumelioti, Z., Raptakis, D., Manakou, M., Liakakis, K., Anastasiadis, A. and Pitilakis,
D., 2013. The EUROSEISTEST strong ground motion database and web portal,
Seismological Research Letters, 84(5), 796-804.
Raptakis, D., Chávez-García, F.J., Makra, K. and Pitilakis, K., 2000. Site effect at Euroseistest-I.
Determination of the valley structure and confrontation of observations with 1D analysis,
Soil Dyn. Earthq. Engrg., 19(1), 1-22.
Raptakis, D.G., Manakou, M.V., Chávez-García, F.J., Makra, K.A. and Pitilakis, K.D., 2005. 3D
configuration of Mygdonian basin and preliminary estimate of its seismic response, Soil Dyn.
Earthq. Engrg, 25, 871-887.
Raptakis, D., 2012. Pre-loading effect on dynamic soil properties: Seismic methods and their
efficiency in geotechnical aspects, Soil Dyn. Earthq. Engrg., 34, 69-77.
Raptakis, D., 2013. Pre-loading effect on site response. Site amplification and soil properties
mismatchk, Soil Dyn. Earthq. Engrg., 53, 1-10.
Raptakis, D. and Makra, K., 2015. Multiple estimates of soil structure at a vertical strong motion
array: Understanding uncertainties from different shear wave velocity profiles, Engineering
Geology, 192, 1-18. http://dx.doi.org/10.1016/j.enggeo.2015.03.016.
Stephenson, W.J., Louie, J.N., Pullammanappallil, S., Williams, R.A. and Odum, J.K., 2005. Blind
shear-wave velocity comparison of ReMi and MASW results with boreholes to 200 m in
Santa Clara Valley: implications for earthquake ground-motion assessment, Bull. Seism.
Zeghal, M., Elgamal, A.W., Tang, H.T. and Stepp, J.C., 1995. Lotung downhole array. II: evaluation
of soil nonlinear properties, J. Geotech. Engrg., ASCE, 121(4), 363-378.
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