COMPARISON OF MEASURED AND COMPUTED LOAD-DEFLECTION BEHAVIOR OF TWO HIGHWAY BRIDGES

Four deck girder highway bridges in Tennessee, located in an area to be inundated as part of a Tennessee Valley Authority reservoir, were tested under static load to failure. Research was directed toward comparing actual bridge behavior with that which could be calculated by using accepted structural analysis methods. This paper is concerned specifically with a comparison of measured and computed load-deflection relationships of two steel girder continuous bridges. Load-deflection curves calculated on the basis of strain compatibility relationships, assuming that the entire bridge with curbs acts as a wide beam, gave results that compared reasonably well with the actual load-deflection curves. Actual and calculated curves were particularly close for bridge A. The behavior of bridge B in the elastic region indicated that, although no provision was made to ensure composite action, such action did exist. The computed load-deflection curve compared very well with the measured curve in the elastic range when composite action was assumed to exist. It was concluded that the method presented for the prediction of load-deflection relationships was satisfactory. The total moment capacities calculated by this method were closed to the measured capacities for both bridges.

Media Info

  • Media Type: Print
  • Features: Figures; References;
  • Pagination: pp 17-25
  • Monograph Title: Bridge design
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00265549
  • Record Type: Publication
  • ISBN: 0309023505
  • Files: TRIS, TRB
  • Created Date: Feb 11 1975 12:00AM