A major issue related to the performance of sliding pendulum isolators employed for the seismic protection of building and structures concerns the heat generation occurring at the sliding interface under large friction forces and high velocities, and the effects of temperature rise on the properties of the friction materials. In this contribution the problem is approached by studying the heat state of seismic isolation units using computer analyses. A finite element model of the pendulum unit was developed and movement at constant speed is applied between the friction surfaces. The generation of frictional heat is reproduced by a heat source located between the two moving parts, with intensity calculated based upon friction coefficient, contact pressure and velocity. Experiments carried out on real scale isolators confirm the reliability of model predictions. The procedure can be a useful design tool for carrying out computational investigations within a wide range of loading and material parameters

HEAT GENERATION IN SLIDING PENDULUM BEARINGS. COMPUTATIONAL STUDY AND EXPERIMENTAL ASSESSMENT

QUAGLINI, VIRGINIO;DUBINI, PAOLO;MOTTA, RICCARDO;FERRONI, DANIELA
2011-01-01

Abstract

A major issue related to the performance of sliding pendulum isolators employed for the seismic protection of building and structures concerns the heat generation occurring at the sliding interface under large friction forces and high velocities, and the effects of temperature rise on the properties of the friction materials. In this contribution the problem is approached by studying the heat state of seismic isolation units using computer analyses. A finite element model of the pendulum unit was developed and movement at constant speed is applied between the friction surfaces. The generation of frictional heat is reproduced by a heat source located between the two moving parts, with intensity calculated based upon friction coefficient, contact pressure and velocity. Experiments carried out on real scale isolators confirm the reliability of model predictions. The procedure can be a useful design tool for carrying out computational investigations within a wide range of loading and material parameters
Proceedings of the 7th World Congress on Joints, Bearings and Seismic Systems for Concrete Structures
SLIDING PENDULUM ISOLATOR; THERMAL ANALYSIS; HEAT GENERATION; COMPUTATIONAL STUDY; EXPERIMENTS
File in questo prodotto:
File Dimensione Formato  
World Congress Proceedings-41.pdf

Accesso riservato

: Post-Print (DRAFT o Author’s Accepted Manuscript-AAM)
Dimensione 204.94 kB
Formato Adobe PDF
204.94 kB Adobe PDF   Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11311/631993
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact