THE EXPLORATION OF FACTORS DETERMINING FATIGUE STRENGTH OF COMPOSITE BEAMS WITH A REDUCED NUMBER OF SHEAR CONNECTORS IN HIGHWAY BRIDGES

THE RESULTS ARE SUMMARIZED OF A LABORATORY STUDY OF THE FATIGUE STRENGTH OF WELDED STUD SHEAR CONNECTORS FOR COMPOSITE CONSTRUCTION. THIS STUDY WAS INITIATED BECAUSE THE DESIGN PROCEDURE STATED IN THE 1961 AASHO STANDARD SPECIFICATIONS FOR HIGHWAY BRIDGES WAS BASED ESSENTIALLY ON STATIC TEST INFORMATION, AND THEREFORE WAS OVERLY CONSERVATIVE. IN THE SUBJECT RESEARCH, COMPOSITE BEAMS WERE DESIGNED AND CONSTRUCTED ON THE FOLLOWING BASES: (1) 1961 AASHO SPECIFICATIONS, (2) THE EXPECTED STRESSES AND FATIGUE STRENGTH CHARACTERISTICS OF THE SHEAR CONNECTORS, AND (3) ON THE BASIS OF (2) WITH AN ADDITIONAL FACTOR OF SAFETY. THE FATIGUE AND ULTIMATE STRENGTH CHARACTERISTICS OF THE ABOVE BEAMS WERE DETERMINED. EVALUATION OF THE RESEARCH PERFORMED INDICATES THAT THE DETERMINATION OF THE NUMBER OF SHEAR CONNECTORS TO BE USED FOR A COMPOSITE BEAM SHOULD BE BASED ON FATIGUE CONSIDERATIONS. /BPR/

• Supplemental Notes:
  • Hpr- 1/4/, 67-2C
• Corporate Authors:

  North Carolina State University, Raleigh

  Raleigh, NC  United States  27695

  North Carolina State Highway and Public Works Commission

  P.O. Box 25201, 1 South Wilmington Street
  Raleigh, NC  United States  27611

  Bureau of Public Roads /US

  400 7th Street, SW
  Washington, DC  United States  20590
• Authors:
  • Uyanik, M E
  • Jetter, F R
• Publication Date: 1969

Subject/Index Terms

• TRT Terms: Beams; Composite materials; Fasteners; Fatigue (Physiological condition); Fatigue tests; Highway bridges; Shear reinforcement; Shear strength; Specifications; Stresses; Studs; Weldments
• Uncontrolled Terms: Composite beams; Shear connectors
• Subject Areas: Bridges and other structures; Highways;

Filing Info

• Accession Number: 00207919
• Record Type: Publication
• Source Agency: Bureau of Public Roads /US
• Files: TRIS
• Created Date: Oct 27 1994 12:00AM