Scholarlink

This paper describes a series of Ambient Vibration Tests (AVTs) conducted on a curved six-span concrete bridge in British Columbia, Canada. Operational Modal Analysis (OMA) was performed to identify the dynamic properties of the structure, including predominant natural frequencies, damping ratios and the corresponding mode shapes. A Finite Element Model (FEM) was created for the structure and updated using the AVTs results. The calibrated FEM can be used to support seismic assessment and upgrading of the bridge. The AVT method was implemented using sophisticated methods of modal analysis. The testing program consisted of multiple measurement setups on predetermined locations using portable sensors. The computer program ARTeMIS was used to analyze the measurement recordings. The software allows to develop a 3D model of the structure and test points; the resulting mode shapes are displayed using this geometry. As result, a total of 8 modes were identified in the 0 to 11 Hz range. Modal frequencies, damping and mode shapes were identified for each of the 8 modes. The OMA results helped refine the FEM by adjusting the theoretical model to align with experimental data. Adjustments included model modifications to boundary conditions, node restraints and material properties. The calibrated model was then validated against the OMA results, ensuring an accurate representation of the bridge’s behavior. This comprehensive analysis provided a detailed assessment of the bridge current condition but also demonstrated the effectiveness of integrating multiple analytical techniques and adapting to field testing data.

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Ambient Vibration Testing, Modal Response Analysis and FE Model Updating of a Curved Concrete Bridge in Canada

  • 会议论文

  • 发表日期：

    2025年

查看全文
  • Mehrtash Motamedi,
  • Carlos E. Ventura,
  • Brook Robazza

摘要

This paper describes a series of Ambient Vibration Tests (AVTs) conducted on a curved six-span concrete bridge in British Columbia, Canada. Operational Modal Analysis (OMA) was performed to identify the dynamic properties of the structure, including predominant natural frequencies, damping ratios and the corresponding mode shapes. A Finite Element Model (FEM) was created for the structure and updated using the AVTs results. The calibrated FEM can be used to support seismic assessment and upgrading of the bridge. The AVT method was implemented using sophisticated methods of modal analysis. The testing program consisted of multiple measurement setups on predetermined locations using portable sensors. The computer program ARTeMIS was used to analyze the measurement recordings. The software allows to develop a 3D model of the structure and test points; the resulting mode shapes are displayed using this geometry. As result, a total of 8 modes were identified in the 0 to 11 Hz range. Modal frequencies, damping and mode shapes were identified for each of the 8 modes. The OMA results helped refine the FEM by adjusting the theoretical model to align with experimental data. Adjustments included model modifications to boundary conditions, node restraints and material properties. The calibrated model was then validated against the OMA results, ensuring an accurate representation of the bridge’s behavior. This comprehensive analysis provided a detailed assessment of the bridge current condition but also demonstrated the effectiveness of integrating multiple analytical techniques and adapting to field testing data.