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.
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Supplemental Notes:
- Sponsored by Committee on Traffic Safety Barriers and Sign, Signal and Lighting Supports. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.
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Authors:
- Bronstad, M E
- Michie, J D
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Conference:
- 51st Annual Meeting of the Highway Research Board
- Location: Washington District of Columbia, United States
- Date: 1972-1-17 to 1972-1-21
- Publication Date: 1972
Media Info
- Media Type: Digital/other
- Features: Figures; References; Tables;
- Pagination: pp 75-77
- Monograph Title: Traffic safety barriers, lighting supports and dike slopes
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Serial:
- Highway Research Record
- Issue Number: 386
- Publisher: Highway Research Board
Subject/Index Terms
- TRT Terms: Components; Crash tests; Crashes; Guardrails; Testing
- Subject Areas: Design; Highways; Research;
Filing Info
- Accession Number: 00203658
- Record Type: Publication
- Report/Paper Numbers: No 386
- Files: TRIS, TRB
- Created Date: Oct 15 1972 12:00AM