LOAD PARTITION AND ULTIMATE STRENGTH OF SHINGLE JOINTS

RESULTS OF TESTS TO FAILURE ARE SUMMARIZED OF TWO LARGE STRUCTURAL SHINGLE JOINTS OF A572 STEEL. ONE JOINT WAS FASTENED WITH A325 BOLTS AND THE OTHER WITH A502 GR. 1 RIVETS. AN ELASTIC ANALYSIS OF THE LOAD PARTITION IS ALSO DESCRIBED. THE ULTIMATE STRENGTH AND DISTRIBUTION OF FORCE IN THE JOINTS WAS ASCERTAINED. THE RESULTS OF THE TWO JOINTS WERE COMPARED SINCE THEIR JOINT GEOMETRY WAS THE SAME. ONLY THE TYPE OF FASTENER DIFFERED. THE TEST RESULTS INDICATED THAT AT EVERY LOAD LEVEL THE RIVETED JOINT EXHIBITED GREATER FLEXIBILITY THAN THE BOLTED JOINT. THE BOLTED JOINT WAS 27% STRONGER THAN THE RIVETED JOINT. THE AVERAGE SHEAR STRENGTH OF THE BOLTED JOINT AT ULTIMATE LOAD WAS 60% OF THE SHEAR STRENGTH OF A SINGLE BOLT. THE RIVETED JOINT FAILED WHEN THE AVERAGE SHEAR STRESS WAS 80% OF THE SHEAR STRENGTH OF A SINGLE RIVET. THE STUDY CONFIRMED THAT THE STRENGTH OF LARGE SHINGLED BOLTED AND RIVETED JOINTS DECREASES WITH INCREASING JOINT LENGTH. THE OBSERVED REDUCTIONS WERE COMPARABLE TO THE REDUCTIONS THAT WERE OBSERVED IN PREVIOUS STUDIES ON BUTT JOINTS. A THEORETICAL ELASTIC SOLUTION FOR THE LOAD PARTITION IN SHINGLE JOINT WAS EXTENDED TO PROVIDE THE STRESS RESULTANTS IN ALL PLATE ELEMENTS AND AT ALL FASTENER SHEAR PLANES. MATRIX NOTATION IS USED TO EXPRESS THE EQUILIBRIUM AND COMPATABILITY CONDITIONS. THE EXPERIMENTAL RESULTS WERE COMPARED WITH THE THEORETICAL ANALYSIS AND SHOWED GOOD AGREEMENT WITHIN THE ELASTIC REGION. THE RESULTS ALSO ASSISTED IN EVALUATING THE BOUNDARY CONDITIONS THAT WERE ASSUMED IN THE ANALYSIS. /AUTHOR/

• Supplemental Notes:
  • Rept No 340.6, 70 PP, 29 FIG, 1 TAB, 12 REF
• Corporate Authors:

  Lehigh University

  Bethlehem, PA  United States  18015
• Authors:
  • Rivera, U
  • Fisher, J W
• Publication Date: 1970-4

Subject/Index Terms

• TRT Terms: Bolts; Boundary value problems; Breaking loads; Elastic analysis; Failure; Joints (Engineering); Rivets; Shear strength; Shear stress; Theory; Ultimate strength
• Uncontrolled Terms: Boundary conditions
• Old TRIS Terms: Elastic analysis (Structural); Joint; Test results
• Subject Areas: Bridges and other structures; Highways;

Filing Info

• Accession Number: 00209347
• Record Type: Publication
• Files: TRIS
• Created Date: Dec 2 1970 12:00AM