基于上部结构振动响应的杭州湾大桥桥塔冲刷状态分析

Translated title of the contribution: Scour condition analysis on pylons of Hangzhou Bay Bridge by tracing dynamic behaviors of superstructures

Wen Xiong, Xuefeng Zhang, Pingbo Tang, Bing Wang, Jianshu Ye

Research output: Contribution to journalArticle

Abstract

A superstructure vibration-based pylon scour condition analysis was proposed. Firstly, the arrangement of sensors installed on the superstructure was suggested based on the theoretical scour-sensitive modal analysis. The multiple field measurements were conducted to record the acceleration data of the superstructure on the ambient vibration. A modal analysis was carried out to obtain the discrepancy of modal parameters between each measurement. The pylon scour condition was evaluated by tracing the changes of the natural frequencies and modes of vibration of bridge superstructure. The method was finally applied in the pylon scour assessment of the Hangzhou Bay Bridge. The sensitivities to scour development for different components and modes were discussed. The accuracy was verified by the underwater measurement of the 3D riverbed terrain around the foundation of the bridge. It is concluded that the pylon scour can be identified by tracing the vibration response of bridge superstructure. The lower order modes or the vibration of the pylon component are more sensitive than others to the scour development of pylons. The proposed scour condition analysis method is economical and convenient, and has no need of underwater operation. Thus, the method can be applied as a routine condition assessment to quickly detect the bridge scour.

Original languageChinese
Pages (from-to)871-877
Number of pages7
JournalDongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Southeast University (Natural Science Edition)
Volume48
Issue number5
DOIs
StatePublished - Sep 20 2018

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Scour
Modal analysis
Vibrations (mechanical)
Natural frequencies
Sensors

Keywords

  • Modal analysis
  • Natural vibration frequency
  • Pylon scour
  • Vibration mode
  • Vibration response

ASJC Scopus subject areas

  • Engineering(all)

Cite this

基于上部结构振动响应的杭州湾大桥桥塔冲刷状态分析. / Xiong, Wen; Zhang, Xuefeng; Tang, Pingbo; Wang, Bing; Ye, Jianshu.

In: Dongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Southeast University (Natural Science Edition), Vol. 48, No. 5, 20.09.2018, p. 871-877.

Research output: Contribution to journalArticle

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