Finite element model updating of multi-span steel-arch-steel-girder bridges based on ambient vibrations

Tsung Chin Hou, Wei Yuan Gao, Chia Sheng Chang, Guan Rong Zhu, Yu Min Su

研究成果: Conference contribution

2 引文 斯高帕斯(Scopus)

摘要

The three-span steel-arch-steel-girder Jiaxian Bridge was newly constructed in 2010 to replace the former one that has been destroyed by Typhoon Sinlaku (2008, Taiwan). It was designed and built to continue the domestic service requirement, as well as to improve the tourism business of the Kaohsiung city government, Taiwan. This study aimed at establishing the baseline model of Jiaxian Bridge for hazardous scenario simulation such as typhoons, floods and earthquakes. Necessities of these precaution works were attributed to the inherent vulnerability of the sites: near fault and river cross. The uncalibrated baseline bridge model was built with structural finite element in accordance with the blueprints. Ambient vibration measurements were performed repeatedly to acquire the elastic dynamic characteristics of the bridge structure. Two frequency domain system identification algorithms were employed to extract the measured operational modal parameters. Modal shapes, frequencies, and modal assurance criteria (MAC) were configured as the fitting targets so as to calibrate/update the structural parameters of the baseline model. It has been recognized that different types of structural parameters contribute distinguishably to the fitting targets, as this study has similarly explored. For steel-arch-steel-girder bridges in particular this case, joint rigidity of the steel components was found to be dominant while material properties and section geometries relatively minor. The updated model was capable of providing more rational elastic responses of the bridge superstructure under normal service conditions as well as hazardous scenarios, and can be used for manage the health conditions of the bridge structure.

原文English
主出版物標題Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, and Civil Infrastructure 2017
編輯Tzu-Yang Yu, H. Felix Wu, Peter J. Shull, Andrew L. Gyekenyesi
發行者SPIE
ISBN(電子)9781510608238
DOIs
出版狀態Published - 2017
事件Conference on Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, Civil Infrastructure, and Transportation XI 2017 - Portland, United States
持續時間: 2017 3月 262017 3月 29

出版系列

名字Proceedings of SPIE - The International Society for Optical Engineering
10169
ISSN(列印)0277-786X
ISSN(電子)1996-756X

Other

OtherConference on Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, Civil Infrastructure, and Transportation XI 2017
國家/地區United States
城市Portland
期間17-03-2617-03-29

All Science Journal Classification (ASJC) codes

  • 電子、光磁材料
  • 凝聚態物理學
  • 電腦科學應用
  • 應用數學
  • 電氣與電子工程

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