[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.
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Mot clés : Solides et structures, Tremblements de terre, villes
@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/
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