FATIGUE BEHAVIOR OF NEGATIVE MOMENT REGIONS OF CONTINUOUS COMPOSITE BEAMS AT LOW TEMPERATURES

The fatigue behavior of the negative moment region of continuous steel-concrete composite beams under Canadian temperature conditions was studied. Tests were conducted on three 26 ft. 0 in. (7.92 m) long beams, continuous over a central support, and on 11 conventional pushout specimens. These were supplemented by a theoretical study of the internal forces in the beams using an interative method of analysis. The close agreement between measured and theoretical strains and deflections indicated that good interaction was achieved throughout the length of the beams. The beams sustained 500,000 cycles of loading with no serious deterioration of composite action. The pattern of stud failures was consistent from beam to beam and reflected closely the calculated distribution of horizontal shear force at the steel-concrete interface. Stud shear connectors in the negative moment region where the slab had cracked in tension were found to be slightly less effective than studs in the positive bending moment regions.

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    National Research Council of Canada

    1200 Montreal Road
    Ottawa, Ontario  Canada  K1A 0R6
  • Authors:
    • LONG, A E
    • Van Dalen, K
    • Csagoly, P
  • Publication Date: 1975-3

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Filing Info

  • Accession Number: 00096230
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jul 15 1975 12:00AM