Assessment of Bridge Expansion Joints Using Long-Term Displacement and Temperature Measurement

The authors present a procedure for using long-term monitoring data for bridge expansion joint assessment. The normal correlation pattern between thermal movement and effective temperature is first established using bridge temperature and expansion joint displacement measurement data. If there is deviation from this normal pattern in the future it will cause alarm. Using design maximum and minimum temperatures, expansion joint displacements are predicted and compared with design allowable values for validation under the established correlation pattern. Measurement data for design verification are also derived for extreme temperatures for a certain return period. Estimation of expansion joint annual or daily-average cumulative movements occurs with the monitoring data for comparison with expected design values. Accurate cumulative displacement prediction will provide a robust basis for reasonable expansion joint inspection or replacement intervals since expansion joint service life and replacement intervals rely on cumulative displacements to a great extent. Expansion joint replacement on the cable-stayed Ting Kau Bridge using one year monitoring data is assessed using the proposed procedure.

  • Availability:
  • Authors:
    • Ni, Y Q
    • Hua, X G
    • Wong, K Y
    • Ko, J M
  • Publication Date: 2007-3-4

Language

  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 01046915
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Apr 3 2007 5:39PM