Physical-parameter identification of base-isolated buildings using backbone curves

Ming Chih Huang*, Yen-Po Wang, Jer Rong Chang, Yi Hsuan Chen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

In this paper, a simplified system identification procedure is developed to investigate the dynamic characteristics of base-isolated buildings equipped with lead-rubber bearings (LRBs). The multistory superstructure is assumed to be linear on the account of substantial reduction in seismic forces due to the installation of LRBs for which a bilinear hysteretic model is considered. The hysteretic model is in turn characterized by a backbone curve by which the multivalued restoring force is transformed into a single-valued function. With the introduction of backbone curves, the system identification analysis of inelastic structures is simplified to a large extent. The proposed algorithm extracts individually the physical parameters of each floor and the bearing system that are considered useful information in the structural health monitoring. A numerical example is conducted to demonstrate the feasibility of using the proposed technique for physical-parameter identification of partially inelastic based-isolated buildings.

Original languageEnglish
Pages (from-to)1107-1114
Number of pages8
JournalJournal of Structural Engineering
Volume135
Issue number9
DOIs
StatePublished - 28 Aug 2009

Keywords

  • Base isolation
  • Curvature
  • Hysteresis
  • Identification
  • Inelasticity
  • Parameters

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