BEHAVIOR OF COMPOSITE BEAMS SUBJECTED TO TORSION

THE DESIGN AND ANALYSIS OF CUR0ED HIGHWAY BRIDGES REQUIRE THE EVALUATION OF THE TORSIONAL PROPERTIES OF THE BRIDGE GIRDER MEMBERS. THE "THIN WALLED THEORY" CAN BE APPLIED WITH CERTAIN MODIFICATION. THESE MODIFICATIONS REQUIRE CONSIDERATION OF THE MATERIAL PROPERTY VARIATIONS AND THE COMPOSITE ACTION OF DECK SLAB AND GIRDERS. INCLUSION OF THESE MODIFICATIONS INTO THE GENERAL THEORY RESULTED IN A SERIES OF EQUATIONS WHICH WERE USED TO EVALUATE THE TORSIONAL PROPERTIES OF TYPICAL COMPOSITE HIGHWAY GIRDERS. THE EXPERIMENTAL TESTING OF FOUR COMPOSITE GIRDERS WAS CONDUCTED TO DETERMINE THE TORSIONAL RIGIDITY, WARPING PHENOMENA, AND FAILURE MODE. RESULTS SHOWED THAT: (1) THE CONCRETE SLAB PREDOMINATES IN TORSIONAL RIGIDITY DETERMINATION. (2) THE CONCRETE SLAB WARPING IS NEGLIGIBLE. (3) THE STEEL BEAM WARPING IS SIGNIFICANT. (4) THE COMPOSITE GIRDER FAILS BY CONCRETE CRACKING IN DIAGONAL TENSION. CORRELATION BETWEEN THEORY AND EXPERIMENTAL DATA INDICATED THAT THE APPLICATION ON THIN WALLED THEORY IS JUSTIFIED. /AUTHOR/

• Corporate Authors:

  University of Maryland, College Park

  Department of Agricultural and Resource Economics
  College Park, MD  United States  20742

  Maryland State Roads Commission

  ,    

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Kuo, J T
  • Heins, C P
• Publication Date: 0

Subject/Index Terms

• TRT Terms: Analysis; Composite structures; Concrete; Curved beams; Design; Failure; Highway bridges; Mode S; Properties of materials; Slabs; Steel; Stiffness; Theory; Thin walls; Torsion; Warpage
• Uncontrolled Terms: Warping
• Old TRIS Terms: Thin walled theory
• Subject Areas: Bridges and other structures; Design; Highways; Materials;

Filing Info

• Accession Number: 00207999
• Record Type: Publication
• Source Agency: Federal Highway Administration
• Report/Paper Numbers: Aw-71-85-46
• Files: TRIS, USDOT
• Created Date: Aug 8 1971 12:00AM