DYNAMIC ANALYSIS OF BEAM-SLAB HIGHWAY BRIDGES

THE FINDINGS OF AN ANALYTICAL STUDY ON THE DETERMINATION OF VEHICLE-INDUCED DYNAMIC RESPONSE OF HIGHWAY BRIDGE SUPERSTRUCTURES ARE PRESENTED. THE INVESTIGATION UTILIZED THE FINITE ELEMENT DISPLACEMENT APPROACH. IN CONTRAST TO THE TRADITIONAL ONE- DIMENSIONAL MODELING, WHICH ASSUMES THE SUPERSTRUCTURE TO BE A SINGLE BEAM, THE SUPERSTRUCTURE IS HERE ASSUMED TO BE TWO-DIMENSIONAL, A COMPOSITION OF DISCRETE BEAM AND SLAB ELEMENTS. THE REPORTED INVESTIGATION WAS CARRIED OUT FOR A SIMPLE SUPPORTED BRIDGE SUPERSTRUCTURE WITH A 71 1/2-FT SPAN LENGTH AND NO SKEW. THE SYSTEM CONSISTS OF SIX 24/45 PRESTRESSED CONCRETE I-BEAMS AND A 7 1/2-IN. THICK CONCRETE DECK. AN AASHO HS20-44 DESIGN VEHICLE WAS SIMULATED BY USING A CONSTANT FORCE SYSTEM IN THE DYNAMIC ANALYSIS. DAMPING WAS NEGLECTED, AND THE BRIDGE SURFACE WAS ASSUMED TO BE FREE OF IMPERFECTIONS. NUMERICAL STUDIES WERE CARRIED OUT FOR VARIOUS LANE LOADINGS AND VARIOUS VEHICULAR SPEEDS. DEFLECTION AND BENDING MOMENT TIME HISTORIES FOR BEAMS AND DEFLECTION CONTOUR GRAPHS FOR THE DECK SLAB CORRESPONDING TO THE 50-MPH VEHICULAR SPEED ARE PROVIDED. ANALYTICAL RESULTS WERE COMPARED WITH THE DATA OBTAINED FROM FIELD TESTS PERFORMED ON THE ACTUAL BRIDGE. A GOOD CORRELATION WAS OBSERVED. THIS PAPER DOES NOT INCLUDE THE EXPERIMENTAL STUDY, WHICH IS PRESENTED IN ANOTHER PUBLICATION. CONCLUSIONS WERE DRAWN AND REPORTED BASED ON THIS INVESTIGATION. /AUTHOR/

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 57-63
  • Monograph Title: Bridge evaluation and analysis
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00209906
  • Record Type: Publication
  • ISBN: 030902157X
  • Files: TRIS, TRB
  • Created Date: Aug 5 1973 12:00AM