RIVETS AND HIGH-STRENGTH BOLTS - A SYMPOSIUM BY THE RESEARCH COUNCIL ON RIVETED AND BOLTED STRUCTURAL JOINTS

AT THIS SYMPOSIUM THE AIMS OF THE RIVET AND BOLT COUNCIL AND ITS METHODS OF PLANNING AND CONDUCTING RESEARCH WERE DISCUSSED AND DESCRIBED. COMPLETED INVESTIGATIONS AND TESTS ON RIVETS AND HIGH-STRENGTH BOLTS WERE PRESENTED. A REPORT WAS GIVEN ON A STUDY WHICH DETERMINED FASTENER BEHAVIOR IN A TENSION-TYPE STRUCTURAL CONNECTION USING ASTM A-325 HIGH- STRENGTH BOLTS, OR RIVETS OF ASTM A-141 STEEL. SUCH FACTORS AS THE FLEXIBILITY OF THE CONNECTED MEMBERS, THE MAGNITUDE OF THE INITIAL CLAMPING FORCE IN FASTENERS, THE NUMBER OF LINES OF FASTENERS AND THE GRIP OF THE FASTENERS WERE INVESTIGATED. THE FOUR VARIABLES INCLUDED IN THE LABORATORY TESTS WERE: (1) THE NUMBER OF LINES OF FASTENERS, (2) THE FLANGE WIDTH, (3) THE FLANGE THICKNESS, AND (4) THE TYPE OF CONNECTOR. A STUDY IS REPORTED OF MOMENT-ROTATION CHARACTERISTICS, THE MOMENT RESISTING CAPACITY, THE POSITION OF THE CENTER OF ROTATION, THE SLIP AND SHEAR DEFORMATION OF THE CONNECTION, THE DEFORMATION OF THE FASTENERS AND THE SEPARATION OF THE COLUMN FLANGES. A PROGRAM OF FATIGUE TESTS OF JOINTS OF HIGH-STRESS STEEL IS REPORTED. VARIOUS PROPERTIES OF JOINTS IN DIRECT TENSIONS MADE FROM STRUCTURAL STEELS ARE PRESENTED. DETERMINATION WAS MADE OF HOW MUCH INCREASE IN LOAD IS ALLOWABLE WHEN STEELS OF HIGHER STRENGTH AND ASTM A-7 STEEL WERE USED IN STRUCTURES IN WHICH FATIGUE STRENGTH IS THE LIMIT OF USEFULNESS. THE EFFECTS OF FABRICATION TECHNIQUES ARE PRESENTED. THE QUESTION OF THE EFFICIENCY OF JOINTS BEING INFLUENCED BY SUCH FACTORS AS PUNCHING OF THE HOLES, MISALIGNMENTS AND PAINT ON JOINING SURFACES IS INVESTIGATED. PROCEDURES ARE DESCRIBED WHICH HAVE BEEN USED TO MAKE CERTAIN THAT HIGH-STRENGTH BOLTS ARE INSTALLED AND TIGHTENED TO PRODUCE THE MINIMUM BOLT TENSION REQUIRED BY SPECIFICATIONS. THE PROCEDURE FOR BOLTING AND INSPECTION DEVELOPED ON THE MACKINAC BRIDGE PROJECT ARE REPORTED.

  • Supplemental Notes:
    • Vol 126, PaRT 2, PAPER NO 3241, PP 693-820
  • Publication Date: 1961

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  • Accession Number: 00208516
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jun 18 1994 12:00AM