Modeling Deformation Induced by Thermal Loading Using Long-Term Bridge Monitoring Data

An accurate correlation model between thermal loading and deformation is required for facilitating a reliable deformation-based condition evaluation in bridge service periods. In this paper, a general approach for modeling closed-form thermal correlation of deformation based on monitoring data is proposed and applied in a long-span arch bridge. First, samples of all available thermal variables and deformation induced by thermal loading are prepared by averaging preprocessed monitoring records at a 10-min interval. Then these available thermal variables are reduced to several predominant thermal variables, each of which represents a cluster of thermal variables with statistical similarity and has the strongest relationship with the thermal deformation in concern. Finally, the model of thermal deformation is formulated as a weighted sum of fitted functions of predominant thermal variables. The weighted coefficients are calculated by the back-propagation neural network technique combined with the mean impact value method and the fitted functions are estimated by the nonlinear least-squares method. The proposed approach is applied to 1 year of monitoring data obtained from a sophisticated structural health monitoring system deployed on the Jiubao Bridge. The proposed method is validated and a closed-form thermal correlation model of vertical deformation in the Jiubao Bridge is established.

• Record URL:
  • https://doi.org/10.1061/(ASCE)CF.1943-5509.0001154
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/08873828
• Supplemental Notes:
  • ©2018 American Society of Civil Engineers.
• Authors:
  • Zhou, Guang-Dong
  • Yi, Ting-Hua
  • Chen, Bin
  • Chen, Xin
• Publication Date: 2018-6

Language

• English

Media Info

• Media Type: Web
• Pagination: 04018011
• Serial:
  • Journal of Performance of Constructed Facilities
  • Volume: 32
  • Issue Number: 3
  • Publisher: American Society of Civil Engineers
  • ISSN: 0887-3828
  • Serial URL: http://ascelibrary.org/toc/jpcfev/27/1

Subject/Index Terms

• TRT Terms: Arch bridges; Deformation; Long span bridges; Structural health monitoring; Temperature
• Identifier Terms: Jiubao Bridge (China)
• Subject Areas: Bridges and other structures; Highways; Maintenance and Preservation;

Filing Info

• Accession Number: 01669974
• Record Type: Publication
• Files: TRIS, ASCE
• Created Date: May 22 2018 5:22PM