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NUMERICAL MODELLING OF SHAKING EFFECTS DUE TO STRONG MOTIONS ON THE TIBER ALLUVIAL DEPOSITS IN ROME (ITALY)

Abstract : A multidisciplinary approach is proposed for evaluating the effects of shaking due to strong motions on the Tiber river alluvial deposits in Rome's historical centre. At this aim, a detailed 3D geological model of the Tiber river alluvial deposit has been constructed and a numerical analysis of site response was performed along two geological sections across the historical centre of Rome. The numerical models were performed in both 1D and 2D configurations assuming linear and nonlinear conditions, by applying a three component seismic input. The results show that the maximum shear strains are strongly conditioned by the layer geometries (i.e. 2D or 1D conditions) and by the soil heterogeneity. Moreover, the reliability of the maximum strains obtained by numerical modeling is discussed comparing these values respect to both the volumetric and the degradation dynamic thresholds of the considered soils.
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https://hal.archives-ouvertes.fr/hal-01314273
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Submitted on : Wednesday, May 11, 2016 - 9:58:26 AM
Last modification on : Wednesday, October 14, 2020 - 4:24:24 AM
Long-term archiving on: : Wednesday, November 16, 2016 - 12:38:32 AM

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  • HAL Id : hal-01314273, version 1
  • ARXIV : 1607.05068

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Fabian Bonilla, Francesca Bozzano, Céline Gelis, Anna Chiara Giacomi, Luca Lenti, et al.. NUMERICAL MODELLING OF SHAKING EFFECTS DUE TO STRONG MOTIONS ON THE TIBER ALLUVIAL DEPOSITS IN ROME (ITALY). Effects of Surface Geology on Seismic Motion, University of California Santa Barbara, Aug 2011, University of California Santa Barbara, United States. ⟨hal-01314273⟩

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