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Título del libro: 8th Us National Conference On Earthquake Engineering 2006
Título del capítulo: Effect of interface friction-variation during sliding on base-isolated structures

Autores UNAM:
EDUARDO BOTERO JARAMILLO; BOGART CAMILLE MENDEZ URQUIDEZ; MIGUEL PEDRO ROMO ORGANISTA;

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Autores externos:

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Idioma:

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Año de publicación:
2006

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Palabras clave:

Base-isolated structures; Displacement patterns; Displacement rate; Kinetic friction coefficient; Mechanical systems; Modal response; Model response; One-form; Relative displacement; Seismic analysis; Seismic energy; Shaking tables; Sliding distances; Sliding interfaces; Stiffness distributions; Vibration characteristics; Civil engineering; Dynamic loads; Engineering geology; Factor analysis; Friction; Seismology; Tribology; Structural design

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Resumen:

Over the last decade many mechanical systems have been developed and implemented to mitigate the magnitude of seismic energy transmitted to structures. One form to achieve this is to use the so called base friction-isolators which dissipate energy by allowing relative displacements between the structure and its foundation. These relative displacements may induce non-accounted effects in the design of the structure, which in turn may cause its modal response to be modified and thus the kinetics due to structure-sliding can induce additional, unknown, dynamic loads. These loads depend on the sliding distance along the interface, changes in displacement rate, interface full contact during pre-earthquake time, transition from static to kinetic friction coefficient during the initiation of sliding, amount of energy that is transmitted through the sliding interface, and mass and stiffness distributions in the model. In this paper a technique to analyze some of these aspects is proposed on the basis of shaking table results obtained from the response of a number of instrumented models. Comparisons between results recorded during different tests, showed that the vibration characteristics of the model response were appreciably affected during the sliding phase, modifying the displacement pattern and its total magnitude. The results point out the necessity of considering the coupled action of the above mentioned factors in the seismic analyses of structures on base friction-isolators. Copyright © (2006) by Earthquake Engineering Research Institute.

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Entidades citadas de la UNAM:

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ISBN:
9781615670444
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Tipo de producto:
Conference Paper