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This research was funded by Ministry of Science, Innovation and Universities grant number RTI2018-099639-B-I00.

Analysis of institutional authors

MuÑoz Diaz, IvanAuthorBarrera-Vargas, Christian AAuthorSoria, Jose MAuthorGarcia-Palacios, Jaime HAuthor
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Enhancing Friction Pendulum Isolation Systems Using Passive and Semi-Active Dampers

Publicated to:Applied Sciences-Basel. 10 (16): - 2020-08-01 10(16), DOI: 10.3390/app10165621

Authors: Barrera-Vargas, Christian A.; Diaz, Ivan M.; Soria, Jose M.; Garcia-Palacios, Jaime H.;

Affiliations

‎ Univ Politecn Madrid, Dept Continuum Mech & Theory Struct, ETS Ingenieros Caminos Canales & Puertos, Madrid 28040, Spain - Author
‎ Univ Politecn Madrid, Dept Hydraul Energy & Environm Engn, ETS Ingenieros Caminos Canales & Puertos, Madrid 28040, Spain - Author

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.

Keywords
Base isolationBase-isolationEnergy-predictive-based controlFriction pendulum systemPhase controlSemi-active control

Quality index

Bibliometric impact. Analysis of the contribution and dissemination channel

The work has been published in the journal Applied Sciences-Basel due to its progression and the good impact it has achieved in recent years, according to the agency WoS (JCR), it has become a reference in its field. In the year of publication of the work, 2020, it was in position 38/90, thus managing to position itself as a Q2 (Segundo Cuartil), in the category Engineering, Multidisciplinary. Notably, the journal is positioned en el Cuartil Q2 para la agencia Scopus (SJR) en la categoría Instrumentation.

From a relative perspective, and based on the normalized impact indicator calculated from the Field Citation Ratio (FCR) of the Dimensions source, it yields a value of: 2.89, which indicates that, compared to works in the same discipline and in the same year of publication, it ranks as a work cited above average. (source consulted: Dimensions May 2025)

Specifically, and according to different indexing agencies, this work has accumulated citations as of 2025-05-16, the following number of citations:

  • WoS: 2
  • Scopus: 14
  • OpenCitations: 11
Impact and social visibility

From the perspective of influence or social adoption, and based on metrics associated with mentions and interactions provided by agencies specializing in calculating the so-called "Alternative or Social Metrics," we can highlight as of 2025-05-16:

  • The use of this contribution in bookmarks, code forks, additions to favorite lists for recurrent reading, as well as general views, indicates that someone is using the publication as a basis for their current work. This may be a notable indicator of future more formal and academic citations. This claim is supported by the result of the "Capture" indicator, which yields a total of: 34 (PlumX).

It is essential to present evidence supporting full alignment with institutional principles and guidelines on Open Science and the Conservation and Dissemination of Intellectual Heritage. A clear example of this is:

  • The work has been submitted to a journal whose editorial policy allows open Open Access publication.
Leadership analysis of institutional authors

There is a significant leadership presence as some of the institution’s authors appear as the first or last signer, detailed as follows: First Author (BARRERA VARGAS, CHRISTIAN ALEXANDER) and Last Author (GARCIA PALACIOS, JAIME).