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Modal Parameters Estimation of Building Structures from Vibration Test Data Using Observability Measurement

Author(s):


Medium: journal article
Language(s): English
Published in: Shock and Vibration, , v. 2015
Page(s): 1-13
DOI: 10.1155/2015/627852
Abstract:

The load distribution to each mode of a structure under seismic loading depends on the modal participation factors and mode shapes and thus the exact estimation of modal participation factors and mode shapes is essential to analyze the seismic response of a structure. In this study, an identification procedure for modal participation factors and mode shapes from a vibration test is proposed. The modal participation factors and mode shapes are obtained from the relationship between observability matrices realized from the system identification. Using the observability matrices, it is possible to transform an arbitrarily identified state space model obtained from the experimental data into a state space model which is defined in a domain with physical meaning. Then, the modal participation factor can be estimated based on the transformation matrix between two state space models. The numerical simulation is performed to evaluate the proposed procedure, and the results show that the modal participation factor and mode shapes are estimated from the structural responses accurately. The procedure is also applied to the experimental data obtained from the shaking table test of a three-story shear building model.

Copyright: © 2015 Jae-Seung Hwang, Hongjin Kim, Bong-Ho Cho
License:

This creative work has been published under the Creative Commons Attribution 3.0 Unported (CC-BY 3.0) license which allows copying, and redistribution as well as adaptation of the original work provided appropriate credit is given to the original author and the conditions of the license are met.

  • About this
    data sheet
  • Reference-ID
    10676341
  • Published on:
    28/05/2022
  • Last updated on:
    01/06/2022
 
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