SHEAR STRENGTH OF HIGH-STRENGTH BOLTS

DOUBLE SHEAR TESTS OF SINGLE 7/8-IN. AND 1-IN. HIGH- STRENGTH BOLTS ARE REPORTED. ALTOGETHER, NINETY-SIX A325 BOLTS WERE TESTED IN A7 STEEL JIGS OR IN A440 STEEL JIGS. EIGHTY-FOUR A354BC, A354BD, AND A490 BOLTS WERE TESTED IN JIGS MADE OF A440 OR CONSTRUCTIONAL ALLOY STEEL. THE EFFECT OF A NUMBER OF VARIABLES ON THE SHEAR STRENGTH AND DEFORMATION AT ULTIMATE LOAD WAS STUDIED. THE STUDY SHOWED THAT BOLTS TESTED IN TENSION JIGS HAD SHEAR STRENGTHS 10 PERCENT LOWER THAN BOLTS TESTED IN COMPRESSION JIGS. INITIAL PRELOAD, FAYING SURFACE CONDITION, AND TYPE OF CONNECTED MATERIAL HAD NO SIGNIFICANT INFLUENCE ON SHEAR STRENGTH. THE SHEAR RESISTANCE OF A BOLT WAS DIRECTLY REFLECTED BY THE AVAILABLE SHEAR AREA. ALSO, IT WAS FOUND THAT THE ULTIMATE SHEAR STRESS WAS APPROXIMATELY 73 PERCENT OF THE TENSILE STRENGTH FOR A325 BOLTS TESTED IN COMPRESSION JIGS AND APPROXIMATELY 68 PERCENT WHEN THESE BOLTS WERE TESTED IN TENSION JIGS. FOR A354BC, A354BD, AND A490 BOLTS, THE CORRESPONDING VALUES WERE 69 PERCENT AND 62 PERCENT. /AUTHOR/

• Supplemental Notes:
  • Vol 91, No ST3, PROC PAPER 4368, PP 99-125
• Authors:
  • Wallaert, J J
  • Fisher, J W
• Publication Date: 1965-6

Media Info

• Serial:
  • Journal of the Structural Division
  • Publisher: American Society of Civil Engineers

Subject/Index Terms

• TRT Terms: Bolts; Compression; Shear strength; Shear tests; Tension; Ultimate strength
• Old TRIS Terms: High strength bolts; Jigs
• Subject Areas: Bridges and other structures; Highways;

Filing Info

• Accession Number: 00208257
• Record Type: Publication
• Files: TRIS
• Created Date: Aug 4 1994 12:00AM