Ambient vibration test and modal analysis for high-rise structure under construction

Weihuan Chen, Zhongrong Lü, Shuhui Chen, Yiqing Ni, Yong Xia, Weiyang Liao

Research output: Journal article publicationJournal articleAcademic researchpeer-review

2 Citations (Scopus)

Abstract

Taking the Guangzhou New TV Tower (GNTVT) under construction as a test bed, a detailed introduction of a ambient vibration test conducted on it under normal wind excitation is given. Two different modal analysis methods, namely, frequency domain based method and time domain based method are used to identify the modal parameters of the tower. The first ten modal parameters, namely, modal frequencies, mode shapes and damping ratios, have been identified successfully from both methods, and they are compared with those from finite element model of SAP2000. It is shown that several low modes agree well with the analytical ones, but large errors are observed in the higher modes. This shows that modal parameters from this test can be used to update the finite element of the tower, such that a better baseline model of the tower can be obtained for future health monitoring and damage detection for the tower.
Original languageEnglish
Pages (from-to)34-40
Number of pages7
JournalZhongshan Daxue Xuebao/Acta Scientiarum Natralium Universitatis Sunyatseni
Volume49
Issue number5
Publication statusPublished - 1 Sep 2010

Keywords

  • Ambient vibration test
  • Health monitoring
  • High-rise structure
  • Modal analysis
  • Parameter identification

ASJC Scopus subject areas

  • General

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