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Communication Dans Un Congrès Année : 2010

Engineering tools to design regular spectra adapted to local site conditions

Régnier Julie
Anne-Marie Duval

Résumé

Site effects are now clearly identified as responsible for damage increases. In France (as in the rest of Europe), public decision makers ask for technical studies that allow to adapt national regulation to specific territories, as towns or a industrial sites. Many technical approaches have been tested during recent years to define either Vs profiles, or site transfer function, or resonance frequency for instance. Based on earthquake recordings, ambient noise measurement or numerical simulation, these methods have been proved to provide one representation of the site response. Many procedures and tools have been published to validate and allow standard use of these techniques. Yet, one step was missing until now : how to transform in practical terms the products of these approaches (resonance frequency, transfer function, surface response spectrum ...) in a response spectrum with similar shape than EC8 spectra? The method proposed here was developed for the urban planning risk in Nice (France) on the bases of differents surveys (H. Cadet, 2009; J. Régnier, 2009; A.-M. Duval, 2001, E. Bertrand, 2007) . It consists first in a comparison of maps elaborated from different approaches: direct EC8 classification, surface signal spectrum from 1D numerical simulations and amplification function issued from Vsz and Fo (Cadet, 2009). The last approach reveals to be the more adapted for the survey scale and goals. Then numerical tools are proposed to build specific regular response spectra (on a reproducible way) from the available elements one the one hand, and to connect each specific spectrum (with any shape) to the closest "regular" response spectrum on the other hand. These proposed tools, together with the experimental and numerical methods now currently available for site effect assessment, allow to draw microzoning map and relative spectra following a reliable and reproducible approach.
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Dates et versions

hal-03588963 , version 1 (25-02-2022)

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  • HAL Id : hal-03588963 , version 1

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Régnier Julie, Anne-Marie Duval, Etienne Bertrand, Héloïse Cadet. Engineering tools to design regular spectra adapted to local site conditions. 14th European Conference on Earthquake Engineering, Aug 2010, Ohrid, Macedonia. ⟨hal-03588963⟩

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