Variable curvature pendulum isolator and viscous fluid damper for seismic isolation of structures

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12 Citations (Scopus)

Abstract

The performance of a variable curvature pendulum isolator (VCPI) with additional passive damping using a viscous fluid damper (VFD) for seismic isolation of a structure is studied. VCPI is developed by varying the curvature of the conventional friction pendulum system (FPS). A four story symmetrical space frame structure isolated using VCPI with VFD is analysed to study the effectiveness of the proposed system. The performance of the VCPI is compared to a corresponding performance of a conventional FPS. The results of the analysis show that the proposed isolator reduces the base shear considerably without increase in the residual displacement. Further, a hybrid system consisting of VCPI and VFD is found to be more effective than a FPS and VFD hybrid system to isolate the structure subjected to the earthquake ground motions.

Original languageEnglish
Pages (from-to)1779-1790
Number of pages12
JournalJVC/Journal of Vibration and Control
Volume17
Issue number12
DOIs
Publication statusPublished - 10-2011

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Pendulums
Fluids
Friction
Hybrid systems
Earthquakes
Damping

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering
  • Automotive Engineering
  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Science(all)

Cite this

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AB - The performance of a variable curvature pendulum isolator (VCPI) with additional passive damping using a viscous fluid damper (VFD) for seismic isolation of a structure is studied. VCPI is developed by varying the curvature of the conventional friction pendulum system (FPS). A four story symmetrical space frame structure isolated using VCPI with VFD is analysed to study the effectiveness of the proposed system. The performance of the VCPI is compared to a corresponding performance of a conventional FPS. The results of the analysis show that the proposed isolator reduces the base shear considerably without increase in the residual displacement. Further, a hybrid system consisting of VCPI and VFD is found to be more effective than a FPS and VFD hybrid system to isolate the structure subjected to the earthquake ground motions.

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