Theoretical and experimental modal analysis of the Guangzhou New TV Tower

W. H. Chen, Z. R. Lu, W. Lin, S. H. Chen, Yiqing Ni, Yong Xia, W. Y. Liao

Research output: Journal article publicationJournal articleAcademic researchpeer-review

96 Citations (Scopus)

Abstract

The Guangzhou New TV Tower (GNTVT) in Guangzhou, China, is a supertall tube-in-tube structure with a total height of 600 m. A complicated structural health monitoring (SHM) system consisting of over 800 sensors has been implemented to the GNTVT for both in-construction and in-service real-time monitoring. By making use of this SHM system, the ambient vibration measurement is carried out in a continuous and long-term manner. This paper presents the analytical and experimental modal analysis of the tower and the field ambient vibration measurement at different construction stages and under different excitation conditions, particularly addressing the following issues: (1) a reduced-order FE model for the GNTVT; (2) field vibration measurement and modal parameter identification of the tower under construction and two environmental excitations (typhoon and earthquake); and (3) comparison of results under different excitation events in the time-frequency domain and correlation between natural frequencies and air temperature using linear regression analysis. The experimental dynamic characteristics of the tower can be used to update the finite element of the tower, so that the updated finite element model of the tower can be obtained, which will serve as the baseline model for future health monitoring and damage detection. They can also be used to verify the effectiveness of vibration control devices installed on the tower.
Original languageEnglish
Pages (from-to)3628-3646
Number of pages19
JournalEngineering Structures
Volume33
Issue number12
DOIs
Publication statusPublished - 1 Dec 2011

Keywords

  • Ambient vibration test
  • Dynamic analysis
  • Finite element method
  • Least-squares regression analysis
  • Modal analysis
  • Structural health monitoring
  • Supertall structure
  • Time-frequency analysis

ASJC Scopus subject areas

  • Civil and Structural Engineering

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