A REVIEW OF SEISMIC SITE AMPLIFICATION BY CONSIDERING GEOMETRICAL AND GEOTECHNICAL CHARACTERISTICS OF SITES

Pooneh Maghoul

In the proceedings of: GeoQuébec 2015: 68th Canadian Geotechnical Conference & 7th Canadian Permafrost Conference

Session: Earthquakes and Geohazards I / Séismes et géoaléas I

ABSTRACT: An extensive numerical analysis on the seismic site effects due to local topographical and geotechnical characteristics is carried out. Two dimensional (2D) configurations under incidence of vertically propagating SV waves is modeled with the aid of HYBRID program, combining finite elements in the near field and boundary elements in the far field. A parametric study is conducted to examine the combined effects of topography and geology on the amplification of the response spectrum at various points across the valley. The influence of different parameters is considered, such as filling ratios (from empty to full valleys), impedance contrasts between bedrock and sediments, and dimensions. Finally, some criteria are proposed in terms of engineering applications to assess the spectral response at the surface of sedimentary valleys.

RÉSUMÉ: Une analyse numérique sur les effets de site sismiques dus aux caractéristiques topographiques et géotechniques locales est effectuée. Les configurations bidimensionnelles (2D) soumises aux ondes SV se propageant verticalement sont modélisées à l'aide du code HYBRID, combinant la méthode des éléments finis dans le champ proche et la méthode des éléments de frontière dans le champ lointain. Une étude paramétrique est menée pour étudier les effets combinés de la topographie et de la géologie sur l'amplification du spectre de réponse à différents endroits dans la vallée. L'influence des différents paramètres est considérée, comme le taux de remplissage, l'impédance entre le substratum rocheux et les sédiments, et les dimensions des vallées. Enfin, certains critères sont proposés en termes d'applications d'ingénierie pour évaluer la réponse spectrale sur la surface des vallées sédimentaires.

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Cite this article:
Pooneh Maghoul (2015) A REVIEW OF SEISMIC SITE AMPLIFICATION BY CONSIDERING GEOMETRICAL AND GEOTECHNICAL CHARACTERISTICS OF SITES in GEO2015. Ottawa, Ontario: Canadian Geotechnical Society.

@article{786,author = Pooneh Maghoul,title = A REVIEW OF SEISMIC SITE AMPLIFICATION BY CONSIDERING GEOMETRICAL AND GEOTECHNICAL CHARACTERISTICS OF SITES ,year = 2015}