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Site effects assessment using ambient excitations (SESAME)

Objective

This proposal deals with the important issue of site effect estimation for seismic risk mitigation, with special attention to urban areas. It focuses on two low cost techniques using ambient seismic vibrations, and aims at clarifying their actual ability to provide useful, direct or indirect, information for local amplification estimates. The first technique, a very simple one, is the so-called H/V technique advertised by Nakamura; he second, more advanced, one uses noise array measurements to derive the dispersion curves of surface waves, and from that the velocity profile. The proposed work includes a theoretical and numerical part to better understand the nature of seismic noise, and to develop validated numerical tools to simulate seismic noise in arbitrary environments. It also includes thorough experimental and data processing investigations to clearly assess the stability, robustness, reliability and physical meaning of these 2 techniques. All the theoretical, experimental and numerical results will be used to propose user guidelines for the H/V technique (a drastic need at the European and world levels since this technique is very often misused), and practical recommendations for array measurements (not yet as developed), and corresponding software

Funding Scheme

CSC - Cost-sharing contracts

Coordinator

UNIVERSITE JOSEPH FOURIER - GRENOBLE 1
Address
Rue De La Piscine 1381 Domaine Universitaire Bètim
38041 Grenoble
France

Participants (13)

CENTRE D'ETUDES TECHNIQUES DE L'EQUIPEMENT - MEDITERRANEE
France
Address
Boulevard Stalingrad 56
06300 Nice
CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE
France
Address
1381,Rue De La Piscine 1381 Univ. Grenoble 1 - Irigm
38041 Grenoble
GEOPHYSICAL INSTITUTE - SLOVAK ACADEMY OF SCIENCES
Slovakia
Address
9,Dubravska Cesta 9
842 28 Bratislava
INSTITUTE OF ENGINEERING SEISMOLOGY AND EARTHQUAKE ENGINEERING
Greece
Address
46,Georgikis Scholis Street 46
55102 Thessaloniki
INSTITUTO DE CIENCIAS DA TERRA E DO ESPACO
Portugal
Address
58,Rua Da Escola Politecnica 58
1269-102 Lisboa
ISTITUTO NAZIONALE DI GEOFISICA E VULCANOLOGIA
Italy
Address
Via Di Vigna Murata 605
Roma
LABORATOIRE CENTRAL DES PONTS ET CHAUSSEES
France
Address
Boulevard Lefebvre 58
75732 Paris
NATIONAL RESEARCH COUNCIL OF ITALY
Italy
Address
Via Mangiagalli 34
20133 Milano
RESONANCE INGENIEURS-CONSEILS SA
Switzerland
Address
Rue Jacques Grosselin 21
1227 Carouge
SWISS FEDERAL INSTITUTE OF TECHNOLOGY ZUERICH
Switzerland
Address
Eth Hoenggerberg
8093 Zurich
UNIVERSITE DE LIEGE
Belgium
Address
Boulevard Du Rectorat - Sart Tilman B19
4000 Liege
UNIVERSITY OF BERGEN
Norway
Address
41,Allegatan 41
5007 Bergen
UNIVERSITY OF POTSDAM
Germany
Address
Karl-liebknecht-strasse 24-25
14415 Potsdam