BEHAVIOR OF COMPOSITE BEAMS SUBJECTED TO TORSION: THE DESIGN OF CURVED VIADUCTS

THE DESIGN AND ANALYSIS OF CURVED HIGHWAY BRIDGES REQUIRE THE EVALUATION OF THE TORSIONAL PROPERTIES OF THE BRIDGE GIRDER MEMBERS. THE APPLICATION OF "THIN WALLED THEORY" CAN BE APPLIED TO THIS PROBLEM WITH CERTAIN MODIFICATIONS. THESE MODIFICATIONS REQUIRE CONSIDERATION OF THE METERIAL PROPERTY VARIATIONS AND THE COMPOSITE ACTION OF DECK SLAB AND GIRDERS. INCLUSION OF THESE MODIFICATIONS INTO THE GENERAL THEORY HAS RESULTED IN A SERIES OF EQUATIONS WHICH CAN THEN BE USED TO EVALUATE THE TORSIONAL PROPERTIES OF TYPICAL COMPOSITE HIGHWAY GIRDERS. THE EXPERIMENTAL TESTING OF FOUR COMPOSITE GIRDERS WAS CONDUCTED IN ORDER TO DETERMINE THE TORSIONAL RIGIDITY, WARPING PHENOMENA AND FAILURE MODE. THE RESULTS SHOWED THAT: (1) THE CONCRETE SLAB PREDOMINATES IN DETERMINATION OF THE TORSIONAL RIGIDITY. (2) THE WARPING OF THE CONCRETE SLAB IS NEGLIGIBLE. (3) THE WARPING IN STEEL BEAM IS SIGNIFICANT, AND (4) THE COMPOSITE GIRDER FAILS BY CRACKING OF THE CONCRETE IN DIAGONAL TENSION. COMPARISONS BETWEEN TEST DATA AND ANALYSIS ARE PRESENTED. GENERALLY, THE CORRELATION BETWEEN THE THEORY AND EXPERIMENT IS EXCELLENT WHICH THEREFORE INDICATES THAT THE APPLICATION OF THIN WALLED THEORY IS JUSTIFIED. /AUTHOR/

  • Supplemental Notes:
    • Rpt No 39, 121 PP, 62 FIG, 28 TAB, 12 REF, 5 APP
  • Corporate Authors:

    University of Maryland, College Park

    Department of Civil and Environmental Engineering
    College Park, MD  USA  20742
  • Authors:
    • Kuo, J T
    • Heins, C P
  • Publication Date: 1971-2

Subject/Index Terms

Filing Info

  • Accession Number: 00209506
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Oct 3 1971 12:00AM