Using component mode synthesis to estimate the restoring force of an isolation layer subjected to earthquakes

Liyu Xie, Akira Mita

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

A new method for estimating the restoring force of an isolation layer in a base-isolated system is proposed. The hybrid motion equation involving the modal coordinates and the physical coordinates is derived by component mode synthesis. This significantly reduces the number of unknown parameters after the mode shape information of the superstructure is substituted and makes it possible to identify the isolation layer directly and locally. The effectiveness of this method was validated in a simulation example and in an application to an actual base-isolated building. The difficulty lies in how to describe the state of a nonlinear device of a real structure. In this paper, the amplitude-dependent equivalent stiffness and damping coefficient are adopted to describe the nonlinearity of the isolation layer. The identified results by our proposed method reconfirm the experimental observation of nonlinearity in the layer made up of isolators.

Original languageEnglish
Pages (from-to)152-177
Number of pages26
JournalStructural Control and Health Monitoring
Volume17
Issue number2
DOIs
Publication statusPublished - 2010 Mar

Fingerprint

Equations of motion
Earthquakes
Damping
Stiffness

Keywords

  • Amplitude dependent
  • Component mode synthesis
  • Hysteresis
  • Identifiability
  • Mode expansion

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Mechanics of Materials

Cite this

@article{4f32a2d10ce64e879876cf16813c6097,
title = "Using component mode synthesis to estimate the restoring force of an isolation layer subjected to earthquakes",
abstract = "A new method for estimating the restoring force of an isolation layer in a base-isolated system is proposed. The hybrid motion equation involving the modal coordinates and the physical coordinates is derived by component mode synthesis. This significantly reduces the number of unknown parameters after the mode shape information of the superstructure is substituted and makes it possible to identify the isolation layer directly and locally. The effectiveness of this method was validated in a simulation example and in an application to an actual base-isolated building. The difficulty lies in how to describe the state of a nonlinear device of a real structure. In this paper, the amplitude-dependent equivalent stiffness and damping coefficient are adopted to describe the nonlinearity of the isolation layer. The identified results by our proposed method reconfirm the experimental observation of nonlinearity in the layer made up of isolators.",
keywords = "Amplitude dependent, Component mode synthesis, Hysteresis, Identifiability, Mode expansion",
author = "Liyu Xie and Akira Mita",
year = "2010",
month = "3",
doi = "10.1002/stc.281",
language = "English",
volume = "17",
pages = "152--177",
journal = "Structural Control and Health Monitoring",
issn = "1545-2255",
publisher = "John Wiley and Sons Ltd",
number = "2",

}

TY - JOUR

T1 - Using component mode synthesis to estimate the restoring force of an isolation layer subjected to earthquakes

AU - Xie, Liyu

AU - Mita, Akira

PY - 2010/3

Y1 - 2010/3

N2 - A new method for estimating the restoring force of an isolation layer in a base-isolated system is proposed. The hybrid motion equation involving the modal coordinates and the physical coordinates is derived by component mode synthesis. This significantly reduces the number of unknown parameters after the mode shape information of the superstructure is substituted and makes it possible to identify the isolation layer directly and locally. The effectiveness of this method was validated in a simulation example and in an application to an actual base-isolated building. The difficulty lies in how to describe the state of a nonlinear device of a real structure. In this paper, the amplitude-dependent equivalent stiffness and damping coefficient are adopted to describe the nonlinearity of the isolation layer. The identified results by our proposed method reconfirm the experimental observation of nonlinearity in the layer made up of isolators.

AB - A new method for estimating the restoring force of an isolation layer in a base-isolated system is proposed. The hybrid motion equation involving the modal coordinates and the physical coordinates is derived by component mode synthesis. This significantly reduces the number of unknown parameters after the mode shape information of the superstructure is substituted and makes it possible to identify the isolation layer directly and locally. The effectiveness of this method was validated in a simulation example and in an application to an actual base-isolated building. The difficulty lies in how to describe the state of a nonlinear device of a real structure. In this paper, the amplitude-dependent equivalent stiffness and damping coefficient are adopted to describe the nonlinearity of the isolation layer. The identified results by our proposed method reconfirm the experimental observation of nonlinearity in the layer made up of isolators.

KW - Amplitude dependent

KW - Component mode synthesis

KW - Hysteresis

KW - Identifiability

KW - Mode expansion

UR - http://www.scopus.com/inward/record.url?scp=77649304782&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77649304782&partnerID=8YFLogxK

U2 - 10.1002/stc.281

DO - 10.1002/stc.281

M3 - Article

VL - 17

SP - 152

EP - 177

JO - Structural Control and Health Monitoring

JF - Structural Control and Health Monitoring

SN - 1545-2255

IS - 2

ER -