LARGE SHINGLE SPLICES THAT SIMULATE BRIDGE JOINTS

WORK ON TWO FULL-SIZE SIMULATED BRIDGE JOINTS AND FIVE SMALL BUTT SPLICES IS SUMMARIZED. ONE LARGE JOINT WAS FASTENED WITH A325 BOLTS AND THE OTHER WITH A502 GR. 1 RIVETS. THE TEST JOINTS SIMULATED A CHORD MEMBER AND SPLICE ON THE BATON ROUGE INTERSTATE BRIDGE, A THREE SPAN CANTILEVER TRUSS BRIDGE OVER THE MISSISSIPPI RIVER. THE SMALL BUTT SPLICES PROVIDED REFERENCE DATA. EACH LARGE JOINT CONSISTED OF THREE MAIN PLATES AND TWO EDGE ANGLES WITH LAP PLATES. THE JOINTS WERE FASTENED WITH 128 BOLTS OR RIVETS. THEY WERE TESTED IN A 5,000,000 LB. UNIVERSAL TESTING MACHINE IN AXIAL TENSION. THE JOINT ELONGATION BEHAVIOR, LOCAL SLIP BEHAVIOR, AND THE FORCE DISTRIBUTION WERE OBSERVED FOR EACH JOINT. THE RESULTS OF THE LARGE SIMULATED JOINTS WERE COMPARED SINCE THEIR JOINT GEOMETRY WAS THE SAME. ONLY THE TYPE OF FASTENER DIFFERED. THE TEST RESULTS INDICATED CLEARLY THAT SUBSTANTIAL SLIP OCCURS IN RIVETED JOINTS. THE RIVITED JOINT SLIPPED 0.023 IN. AS COMPARED TO 0.030 IN. FOR THE BOLTED JOINT. IN ADDITION, THE RIVETED JOINT INDICATED GREATER FLEXIBILITY AT ALL STAGES OF LOADING. THE JOINT TESTS ALSO ILLUSTRATED THAT COMPLEX BOLTED JOINTS ARE NOT LIKELY TO SLIP THE FULL AMOUNT OF THE BOLT HOLE CLEARANCE. THIS STUDY ALSO CONFIRMED THAT THE HIGHER ALLOWABLE STRESSES SUGGESTED IN PREVIOUS INVESTIGATIONS PROVIDED SUITABLE BEHAVIOR IN THE WORKING LOAD RANGE AND UP TO JOINT SLIP. A THEORETICAL ELASTIC SOLUTION WAS ALSO DEVELOPED FOR THE LOAD PARTITION IN A SHINGLE JOINT. IT IS BASED ON PREVIOUS WORK ON SYMMETRICAL BUTT SPLICES. THE SOLUTION PROVIDES THE STRESS PLANES. MATRIX NOTATION IS USED TO EXPRESS THE EQUILIBRIUM AND COMPATIBILITY CONDITIONS. THE SOLUTION IS ILLUSTRATED BY CONSIDERING THE FORCES IN TWO SHINGLE JOINTS. IT IS BELIEVED THAT THE THEORETICAL SOLUTION CAN BE USED TO CHECK THE LOAD DISTRIBUTION IN THE LARGE TEST JOINTS AND THAT IT SHOULD BE EXTENDED INTO THE INELASTIC REGION. /AUTHOR/

• Supplemental Notes:
  • Rpt No 340.I, 111 PP, 48 FIG, 19 REF
• Corporate Authors:

  Lehigh University

  Bethlehem, PA  United States  18015
• Authors:
  • Yoshida, N
  • Fisher, J W
• Publication Date: 1968-12

Subject/Index Terms

• TRT Terms: Bolted joints; Bolts; Butt joints; Joints; Lap joints; Load transfer; Mathematical analysis; Rivets; Shingles; Simulation; Splicing; Stresses; Tension; Testing equipment; Truss bridges
• Old TRIS Terms: Axial tension; Riveted joints
• Subject Areas: Bridges and other structures; Highways;

Filing Info

• Accession Number: 00208943
• Record Type: Publication
• Files: TRIS
• Created Date: Apr 21 1994 12:00AM