BOLTED HYBRID JOINTS

THIS REPORT PRESENTS THE RESULTS OF AN ANALYTICAL STUDY OF HYBRID STEEL BUTT JOINTS OF A36, A440 AND A514 STEEL. THE JOINTS WERE FASTENED BY EITHER A325 OR A490 BOLTS. THE STUDIES WERE DESIGNED TO DETERMINE THE EFFECT OF VARIOUS VARIABLES ON THE JOINT STRENGTH. THE MAJOR VARIABLES STUDIED WERE JOINT LENGTH AND THE RATIO OF THE NET PLATE AREA, A SUB N, TO THE TOTAL FASTENER SHEAR AREA, A SUB S. THE STUDIES INDICATED THAT THE AVERAGE SHEAR STRENGTH OF HYBRID JOINTS WAS EQUAL OR GREATER THAN THE AVERAGE SHEAR STRENGTH OF HOMOGENEOUS JOINTS. HYBRID JOINTS BEHAVED SIMILARLY TO HOMOGENEOUS JOINTS IN THAT AS THE JOINT LENGTH WAS INCREASED, THE AVERAGE SHEAR STRENGTH DECREASED. ALSO, A DECREASE IN A SUB N / A SUB S RATIO IN HYBRID JOINTS WAS ACCOMPANIED BY THE DECREASE IN AVERAGE SHEAR STRENGTH EXPERIENCED WITH HOMOGENEOUS JOINTS. CURRENTLY USED (1966) DESIGN STRESSES WERE EXAMINED AND IT WAS DEMONSTRATED THAT INCREASING ALLOWABLE STRESSES IN BOTH A325 AND A490 BOLTS WOULD HAVE LITTLE EFFECT ON THE MINIMUM FACTOR OF SAFETY IN BEARING-TYPE CONNECTION. /AUTHOR/

• Supplemental Notes:
  • Hpr-1/3/, NO 317.5, NO 360
• Corporate Authors:

  Lehigh University

  Bethlehem, PA  United States  18015

  Pennsylvania Department of Transportation

  1215 Transportation and Safety Building
  Harrisburg, PA  United States  17120
• Authors:
  • Kormanik, R
  • Fisher, J W
• Publication Date: 1966-9

Subject/Index Terms

• TRT Terms: Analysis; Area; Bolted joints; Bolts; Butt joints; Fasteners; Joints; Length; Plate metal; Shear strength; Steel; Studies
• Old TRIS Terms: Area ratio; Hybrid joints; Study analysis
• Subject Areas: Bridges and other structures; Highways;

Filing Info

• Accession Number: 00207814
• Record Type: Publication
• Source Agency: Bureau of Public Roads /US
• Files: TRIS, STATEDOT
• Created Date: Feb 15 1994 12:00AM