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Título del libro: 12th National Conference On Earthquake Engineering, Ncee 2022
Título del capítulo: Three-dimensional Effects in the Seismic Response of Two-dimensional Alluvial Valleys for Oblique Incidence of P, SV, SH and Rayleigh Waves

Autores UNAM:
FRANCISCO JOSE SANCHEZ SESMA; MARCELA ELVIRA BAENA RIVERA;

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Autores externos:

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Idioma:

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Año de publicación:
2022

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Palabras clave:

Boundary element method; Earthquake engineering; Engineering geology; Rayleigh waves; Sailing vessels; Seismic waves; Wave propagation; 3D effects; Alluvial valleys; Engineering practices; Indirect boundary element method; Layered media; Oblique incidence; Theoretical technique; Three dimensional effect; Two-dimensional; Wave propagation problems; Seismic response

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Resumen:

The seismic response of alluvial valleys is usually studied by simplifying them as horizontally layered media and solving the resultant 1D wave propagation problem. However, lateral geometric and material irregularities give rise to additional 3D effects and make their analyses more complicated. This explains why these effects are often neglected in common engineering practices. Various theoretical techniques have been proposed to study the problem quantitatively. Among them are domain approaches like finite differences, spectral elements, and finite elements. Because of the computational cost and complexity of domain methods, boundary formulations have become more popular due to their dimensionality reduction. In this study, we bridge the gap between simplified models and more complex real cases by using the indirect boundary element method (IBEM) to investigate the 3D response of 2D geological models. This is the case when a 2D basin is subjected to an oblique seismic wave (2.5D case). While the formulation is 3D, the numerical burden increases slightly because the analyzed section remains 2D. The features of 2.5D IBEM are summarized, and some results for a simplified model under oblique incidence of Rayleigh waves are described. © 2022 12th National Conference on Earthquake Engineering, NCEE 2022 All rights reserved.

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Entidades citadas de la UNAM:

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Fuente:


ISBN:
9781713884767
Editorial:
Earthquake Engineering Research Institute

Tipo de producto:
Conference Paper