MINIMUM REQUIRED SHEAR CONNECTORS BETWEEN SLABS AND STEEL STRINGERS IN COMPOSITE CONSTRUCTION BRIDGES

THE STUDY WAS UNDERTAKEN IN ORDER TO DETERMINE IF SATISFACTORY COMPOSITE ACTION OF A CONCRETE SLAB ON STEEL BEAMS COULD BE OBTAINED WITH A LESSER NUMBER OF SHEAR CONNECTORS THAN REQUIRED BY AASHO SPECIFICATIONS. TWO ALTERNATIVE APPROACHES WERE USED' THE ELIMINATION OF SHEAR CONNECTORS AT THE ENDS OF THE BEAM OUTSIDE THE CENTRAL PORTION OF THE SPAN WHERE THE MOMENT CAPACITY OF THE STEEL STRINGER ALONE WAS EXCEEDED, AND CONVERSELY, THE PROVISION OF SHEAR CONNECTORS ONLY NEAR THE ENDS OF THE SPAN TO RETARD END SLIPPAGE SUFFICIENTLY TO FURNISH COMPOSITE ACTION THROUGHOUT THE SPAN. THREE TEST BEAMS INCORPORATING EACH OF THE ABOVE TWO CONCEPTS WERE LOADED STATICALLY AT 2 POINTS NEAR MIDSPAN ALONG WITH 3 CONTROL BEAMS DESIGNED IN ACCORDANCE WITH AASHO SPECIFICATIONS. THE LOADING WAS INCREASED FROM ZERO TO THREE INCREMENTS WITHIN THE ELASTIC RANGE IN TURN AND THENCE TO ULTIMATE. THE RESULTS ARE PRESENTED IN TERMS OF OBSERVED DEFLECTION, STRAIN AND SLIP AT THE VARIOUS LOAD LEVELS. IT WAS CONCLUDED THAT THE PERFORMANCE OF THE BEAMS WITH SHEAR CONNECTORS AT THE SPAN ENDS ONLY COMPARED FAVORABLY WITH THAT OF THE CONTROL BEAMS. IT WAS POINTED OUT, HOWEVER, THAT THE TEST PROGRAM WAS LIMITED TO STATIC TESTS AND THAT FATIGUE LOADING EFFECTS ON SIMILAR SPECIMENS SHOULD BE INVESTIGATED. /BPR/

  • Supplemental Notes:
    • Hps-1/27/, JUN64
  • Corporate Authors:

    North Carolina State University, Raleigh

    Raleigh, NC  USA  27695
  • Authors:
    • Uyanik, M E
    • Bramer, C R
    • Robinson, J C
  • Publication Date: 1964-6

Subject/Index Terms

Filing Info

  • Accession Number: 00207728
  • Record Type: Publication
  • Source Agency: Bureau of Public Roads /US
  • Files: TRIS
  • Created Date: Oct 1 1994 12:00AM