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Título del libro: Optimal Energy Growth In Variable-Density Mixing Layers At High Atwood Number
Título del capítulo: Structural behavior of the support of a railway bridge that the footing was rebuilt

Autores UNAM:
HECTOR GUERRERO BOBADILLA; VICTOR CECILIO ROMOALDO; JOSE ALBERTO ESCOBAR SANCHEZ; ROBERTO GOMEZ MARTINEZ;

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Autores externos:

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Idioma:
Inglés

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Año de publicación:
2019

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Palabras clave:

Finite element method; Numerical models; Pile foundations; Piles; Springs (components); Ambient vibrations; Dynamic response analysis; Foundation piles; Inelastic behavior; Non-linear static analysis; Structural behaviors; Structural component; Structural point; Structural health monitoring

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Resumen:

A study on the behavior of a bridge support (column, footing and foundation piles) with re-foundation is presented. Re-foundation was carried out because two out-of-six piles, that make up its foundation, presented doubtful integrity. Therefore, the construction of three new piles and expansion of the shoe to improve the load capacity was proposed. For this study three numerical models were developed: two elastic (based on finite elements) and one non-linear (based on multi-springs). In one of the finite element models, "solid" elements were used; while in the other used frame elements. The models were calibrated with the results of ambient vibration. The multi-springs had the ability to represent the inelastic behavior of the structural components. Likewise, each model was analyzed for five case studies emulating scenarios the foundation pile with doubtful integrity. To determine the support's behavior, the numerical models were studied applying dynamic response analysis using a series of grond motions (i.e. synthetic earthquakes obtained from the project design spectrum). For the multi-springs model, additional non-linear static analysis (pushover) was performed to obtain the yielding displacement. According to the obtained results, it was seen that, from a structural point of view, the improved support has adequate load capacity to resist the expected acting loads. © 2019 9th International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII 2019 - Conference Proceedings. All rights reserved.

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Entidades citadas de la UNAM:

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Fuente:


ISBN:
9780000000002
Editorial:
TSFP-9

Tipo de producto:
Conference Paper