EVALUATION OF A NEW GUARDRAIL TERMINAL

CRASH TESTS WERE UTILIZED TO TEST A GUARDRAIL TERMINAL FOR THE G4S OR G4W BARRIER. THE PRINCIPAL FEATURES OF THE TERMINAL ARE THE ANCHOR-CABLE-TO-END POST DETAIL AND BEAM END DESIGN THAT ENABLES IT TO REDIRECT ANGLE IMPACTS AND YET SAFELY BREAK AWAY FROM THE DIRECT IMPACT. THE TERMINAL CONSISTS OF A CABLE ATTACHED THROUGH A HOLE IN THE END POST THAT IS SET IN CONCRETE AND ACTS AS A BEAM. THE HOLE, LOCATED NEAR GRADE LEVEL, WEAKENS THE POST IN FLEXURE AND SHEAR FOR FORCES APPLIED ABOVE THE HOLE. HENCE, WHEN A VEHICLE STRIKES THE POST, IT BREAKS AT THE HOLE; THIS RELEASES THE CABLE AND THUS GREATLY DIMINISHES SPEARING FORCES THAT CAN DEVELOP IN THE BEAM. IN ADDITION, THE BEAM IS STIFFENED WITH A STEEL DIAPHRAGM OR LIGHTWEIGHT CONCRETE THAT SERVES AS A "LOAD SPREADER" TO FURTHER REDUCE THE POSSIBILITY OF BEAM-SPEARING DURING DIRECT-ON HITS. PRINCIPLES OF THE CONCEPT AND COMPONENT FUNCTIONS ARE SUMMARIZED.

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 75-77
  • Monograph Title: Traffic safety barriers, lighting supports and dike slopes
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00203658
  • Record Type: Publication
  • Report/Paper Numbers: No 386 pp
  • Files: TRIS, TRB
  • Created Date: Oct 15 1972 12:00AM