[Réponse sismique d'un ensemble de blocs partiellement encastrés dans un terrain mou]
On étudie numériquement la réponse sismique d'un ensemble de dix blocs, dissemblables, non équiespacés et ancrés dans une couche molle au-dessus d'un demi-espace dur, et on montre qu'elle est généralement plus importante, en termes d'amplitude, durée et variabilité spatiale, que la réponse au niveau du sol en presence d'un seul bloc ou en l'absence de blocs. Ceci est qualitativement en accord avec la réponse sismique constatée dans le passé dans des villes telles que Mexico et indique que la partie bâtie peut, dans certaines conditions, jouer un rôle significatif dans la réponse sismique globale d'une ville.
The seismic response of a set of ten non-equally spaced, non-equally sized, homogeneous blocks partially imbedded in a soft soil layer overlying a hard halfspace is studied numerically and shown to be generally larger, in terms of amplitude, duration and spatial variability than that of the ground in the presence of one block or in the absence of blocks. This is qualitatively similar to observed seismic response in the past at sites such as Mexico City and suggests that the built portion of cities may, under certain conditions, play a significant role in the global seismic response of a city.
Accepté le :
Publié le :
Mots-clés : Solides et structures, Tremblements de terre, villes
Chrysoula Tsogka 1 ; Armand Wirgin 1
@article{CRMECA_2003__331_3_217_0,
author = {Chrysoula Tsogka and Armand Wirgin},
title = {Seismic response of a set of blocks partially imbedded in soft soil},
journal = {Comptes Rendus. M\'ecanique},
pages = {217--224},
publisher = {Elsevier},
volume = {331},
number = {3},
year = {2003},
doi = {10.1016/S1631-0721(03)00041-X},
language = {en},
}
Chrysoula Tsogka; Armand Wirgin. Seismic response of a set of blocks partially imbedded in soft soil. Comptes Rendus. Mécanique, Volume 331 (2003) no. 3, pp. 217-224. doi : 10.1016/S1631-0721(03)00041-X. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.1016/S1631-0721(03)00041-X/
[1] EQE: The January 17, 1995 Kobe earthquake, EQE summary report, April 1995, http://www.eqe.com/publications/kobe/kobe.htm
[2] M. Mucciarelli, R. Camassi, M.R. Gallipoli, The Izmit (Turkey) 1999 earthquake, http://www.pz.cnr.it/imaaa/turchia/report_e.html
[3] Numerical analysis of seismic wave amplification in Nice (France) and comparisons with experiments, Soil Dynam. Earthquake Engrg., Volume 19 (2000), pp. 347-362
[4] Evidence for anomalous body-wave radiation between 0.3 and 0.7 Hz from the 1985 September 19 Michoacan, Mexico earthquake, J. Int. Geophys., Volume 101 (1990), pp. 37-48
[5] Site effects in Mexico City eight years after the September 1985 Michoacan earthquakes, Soil Dynam. Earthquake Engrg., Volume 13 (1994), pp. 229-247
[6] The Mexico earthquake of September 19, 1985 – a theoretical investigation of large-and small-scale amplification effects in the Mexico City valley, Earthquake Spectra, Volume 4 (1988), pp. 609-633
[7] Site Amplification in the Los Angeles Basin from three-dimensional modeling of ground motion, Bull. Seism. Soc. Am., Volume 90 (2000), pp. 77-94
[8] Variablility of site response in the Los Angeles urban area, Bull. Seism. Soc. Am., Volume 87 (1997), pp. 1377-1400
[9] The seismic response of the Los Angeles Basin, California, Bull. Seism. Soc. Am., Volume 88 (1998), pp. 337-356
[10] Soil amplification of plane seismic waves, Phys. Earth Planet Int., Volume 22 (1989), pp. 122-136
[11] Love waves in a slab with rough boundaries (D.F. Parker; G. Maugin, eds.), Recent Developments in Surface Acoustic Waves, Springer, Berlin, 1988, pp. 145-155
[12] Effects of buildings on the duration and amplitude of ground motion in Mexico City, Bull. Seism. Soc. Am., Volume 86 (1996), pp. 914-920
[13] C. Tsogka, Modélisation mathématique et numérique de la propagation des ondes élastiques tridimensionnelles dans des milieux fissurés, Thèse de Doctorat, Université Paris IX Dauphine, Paris, 1999
[14] Application of the fictitious domain method to 2D linear elastodynamic problems, J. Comput. Acoust., Volume 9 (2001), pp. 1175-1202
[15] A perfectly matched layer for the absorption of electromagnetic waves, J. Comput. Phys., Volume 114 (1994), pp. 185-200
[16] Application of the PML absorbing layer model to the linear elastodynamic problem in anisotropic heterogeneous media, Geophys., Volume 66 (2001), pp. 294-307
[17] Etude d'un nouvel élément fini mixte permettant la condensation de masse, C. R. Acad. Sci. Paris, Sér. I, Volume 324 (1997), pp. 1281-1286
[18] An analysis of new mixed finite elements for the approximation of wave propagation problems, SIAM J. Numer. Anal., Volume 37 (2000), pp. 1053-1084
[19] Amplification du mouvement du sol au voisinage d'un groupe de montagnes de profil rectangulaire ou triangulaire soumis à une onde sismique SH, Génie Parasismique et Aspects Vibratoires dans le Génie Civil, AFPS, Saint-Rémy-lès-Chevreuse, 1993, p. ES-28-ES-37
[20] Site-city seismic interaction in Mexico City like environments: an analytic study, Bull. Seism. Soc. Am., Volume 92 (2002), pp. 794-804
[21] Vibration Analysis Using Simple Physical Models, Prentice-Hall, Englewood Cliffs, 1994
[22] Resonances of low-velocity layers with lateral variations, Bull. Seism. Soc. Am., Volume 74 (1984), pp. 521-537
[23] P-SV resonances in irregular low-velocity surface layers, Bull. Seism. Soc. Am., Volume 75 (1984), pp. 847-864
[24] Calcul Dynamique des Structures en Zone Sismique, Eyrolles, Paris, 1980
Cité par Sources :
Commentaires - Politique