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Título del libro: Computer Methods For Geomechanics: Frontiers And New Applications
Título del capítulo: Seismic response of bridges with massive foundations

Autores UNAM:
JUAN MANUEL MAYORAL VILLA;

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Autores externos:

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Idioma:
Inglés

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Año de publicación:
2011

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Palabras clave:

Convenient alternatives; Massive foundations; Raft foundations; Seismic scenarios; Spectral acceleration; Structural response; Structural seismic response; Structurally-connected; Dynamic response; Earthquakes; Foundations; Overpasses; Seismic response; Three dimensional; Geomechanics

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Resumen:

The dynamic response of vehicular overpasses with massive foundations built in highly populated earthquake prone regions is studied, to assess the massive foundation potential of being a technically sound mean to reduce the structural response during major earthquakes. The study consists on numerical simulations using 3-D fi nite element models. Two typical supports of a major 23 km long vehicular overpass currently under construction in the north east part of Mexico City valley were considered in this research. Initially, a conventional raft foundation structurally connected to four precast closed-end concrete piles was considered. Then, a massive foundation of variable depth was assumed. Lateral dynamic stiffness and damping were computed for all cases in order to evaluate the effect of the massive foundation. Sets of 3-D fi nite element models were developed and the response of the systems was evaluated for a typical seismic scenario such as that prevailing at the zone, assuming a potential Mw = 8.1 seismic event. Important attenuations of about 30% to 50% at the upper deck spectral accelerations and of 17% to 30% in displacements were achieved with the massive soil improvement, for the case analyzed. Thus, the massive foundations seem to be a convenient alternative to reduce the overall structural seismic response.

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Entidades citadas de la UNAM:

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Fuente:


ISBN:
9780980824421
Editorial:

Tipo de producto:
Conference Paper