Enhancing Friction Pendulum Isolation Systems Using Passive and Semi-Active Dampers

Barrera Vargas, Christian Alexander and Muñoz Díaz, Iván and Soria Herrera, José Manuel and García Palacios, Jaime (2020). Enhancing Friction Pendulum Isolation Systems Using Passive and Semi-Active Dampers. "Applied Sciences", v. 10 (n. 16); p. 5621. ISSN 2076-3417. https://doi.org/10.3390/app10165621.

Description

Title: Enhancing Friction Pendulum Isolation Systems Using Passive and Semi-Active Dampers
Author/s:
  • Barrera Vargas, Christian Alexander
  • Muñoz Díaz, Iván
  • Soria Herrera, José Manuel
  • García Palacios, Jaime
Item Type: Article
Título de Revista/Publicación: Applied Sciences
Date: 13 August 2020
ISSN: 2076-3417
Volume: 10
Subjects:
Freetext Keywords: Base Isolation, Friction Pendulum System, Semi-Active Control, Phase Control, Energy-Predictive-Based Control
Faculty: E.T.S.I. Caminos, Canales y Puertos (UPM)
Department: Mecánica de Medios Continuos y Teoría de Estructuras
Creative Commons Licenses: Recognition - No derivative works - Non commercial

Full text

[img]
Preview
PDF - Requires a PDF viewer, such as GSview, Xpdf or Adobe Acrobat Reader
Download (4MB) | Preview

Abstract

Friction pendulum systems (FPSs) are a common solution for isolating civil engineering structures under ground movements. The result is a base-isolated structure in which the base exhibits low shear stiffness in such a way that the input energy of the earthquake is concentrated and dissipated into it, leaving the superstructure free of damage. As a consequence, large displacements of the FPS may be demanded depending on the earthquake intensity and the fundamental period of the FPS. To accommodate these displacements, large-size isolators with high friction coefficients are usually required. However, the FPS will then exhibit poor re-centering capacity and the risk of future shocks will increase due to previous residual displacements, especially for low-intensity earthquakes. An alternative solution is to include a semi-active damper to the FPS, keeping the friction coefficient low and achieving both, limited base displacement under high-intensity earthquakes and good re-centering capacity under low-intensity ones. Thus, this work presents a design methodology for base isolators formed by an FPS with a damper added. The design methodology is applied to an FPS with a passive damper and to an FPS with a semi-active damper. Two ON-OFF control strategies are studied: (i) a fairly simple phase control, and (ii), a mechanical energy-predictive based algorithm. The advantages of semi-active FPSs with low friction coefficients with respect to FPS with high friction coefficients are demonstrated. The results with the designed semi-active FPS are compared with the single FPS and the FPS with a passive damper. Finally, the use of semi-active FPS allows us to enhance the FPS performance as the isolator size can be reduced while keeping the capacity to cope with low and high-intensity earthquakes without residual displacements.

Funding Projects

TypeCodeAcronymLeaderTitle
Government of SpainRTI2018-099639-B-I00UnspecifiedUnspecifiedMejora de la eficiencia estructural de puentes sometidos a acciones dinámicas: integración de amortiguadores inteligentes

More information

Item ID: 67396
DC Identifier: https://oa.upm.es/67396/
OAI Identifier: oai:oa.upm.es:67396
DOI: 10.3390/app10165621
Official URL: https://www.mdpi.com/2076-3417/10/16/5621
Deposited by: Memoria Investigacion
Deposited on: 23 Jun 2021 14:52
Last Modified: 23 Jun 2021 14:52
  • Logo InvestigaM (UPM)
  • Logo GEOUP4
  • Logo Open Access
  • Open Access
  • Logo Sherpa/Romeo
    Check whether the anglo-saxon journal in which you have published an article allows you to also publish it under open access.
  • Logo Dulcinea
    Check whether the spanish journal in which you have published an article allows you to also publish it under open access.
  • Logo de Recolecta
  • Logo del Observatorio I+D+i UPM
  • Logo de OpenCourseWare UPM