Ry-μ-Tn relations for seismically isolated structures

Anastasios Tsiavos, Michalis F. Vassiliou, Kevin R. Mackie, Bozidar Stojadinovic

Research output: Contribution to conferenceConference Paperpeer-review

6 Citations (Scopus)

Abstract

The relations between the strength reduction factor Ry, the displacement ductility μ and the vibration period of the structure Tn have been extensively studied for fixed-base structures by numerous researchers in the past. This project aims at identifying similar relations for base-isolated structures. The investigation is conducted using a two-degree-offreedom model of a base-isolated structure. The hysteretic behavior of the base isolation devices and the isolated superstructure is simulated in Matlab and OpenSees using a Bouc-Wen model. The results of the observed response are verified through the excitation of the isolated structure by a large number of recorded ground motions. These motions cover a wide range of ground motion types, magnitudes and distances. The effects of base isolation and superstructure design parameters, such as stiffness and strength, are quantified through parametric studies. The resulting Ry-μ-Tn relationship for inelastic seismically isolated structures is based on the statistical processing of the inelastic response data of the isolated superstructure.

Original languageEnglish
Pages1771-1781
Number of pages11
Publication statusPublished - 1 Jan 2013
Event4th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, COMPDYN 2013 - Kos Island, Greece
Duration: 12 Jun 201314 Jun 2013

Conference

Conference4th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, COMPDYN 2013
CountryGreece
CityKos Island
Period12/06/1314/06/13

Keywords

  • Extreme hazards
  • Inelastic isolated structures
  • Resilience
  • Seismic isolation

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