DYNAMIC TESTING PROCEDURES FOR HIGHWAY BRIDGES USING TRAFFIC LOADS

Dynamic bridge testing techniques used on a series of highway bridges in Quebec, Canada, are presented in this paper. Investigators developed the procedures in order to obtain a reliable evaluation of the dynamic amplification factor for existing bridges and as part of an ongoing rehabilitation program of Quebec's road network. Vertical acceleration responses are obtained under normal or controlled traffic using different test vehicles and loading patterns. The vibration frequencies and mode shapes are computed from a frequency analysis of the measured data and are used to calibrate finite-element models for each structure. Data processing techniques and experimental methods are described. Discussion focuses on the need to establish standard testing procedures; some recommendations are offered. Examples from dynamic tests carried out on three different highway bridges are provided and then compared with finite-element eigenvalue analyses.

Language

  • English

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Filing Info

  • Accession Number: 00674165
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Feb 23 1995 12:00AM