Cable-to-post attachments for a non-proprietary high-tension cable barrier - phase II.

Details

• Creators:
  Rosenbaugh, Scott K. ; Humphrey, Brandt M. ; Reid, John D. ; Bielenberg, Robert W. ; Faller, Ronald K. ; Lechtenberg, Karla A.
• Corporate Creators:
  Midwest Roadside Safety Facility
• Corporate Contributors:
  United States. Federal Highway Administration
• Subject/TRT Terms:
  • Median barriers
  • Posts
  • Cables
  • Guardrails
  • Impact tests
  • Highway safety
  • Design load
  • Brackets
• Publication/ Report Number:
  TRP-03-313-15
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• Corporate Publisher:
  Midwest States Regional Pooled Fund Program
• Abstract:
  The research objectives reported herein were based on further development of cable-to-post attachment hardware for use in ; the non-proprietary high-tension cable barrier system. Specifically, this project aimed to develop and evaluate alternative ; attachment designs for the bolted, tabbed bracket and evaluate the use of a larger diameter, keeper rod for use in the top ; cable attachment. ; From a group of over 25 alternative attachment concepts, two tabbed bracket designs were selected for evaluation through ; dynamic component testing: 1) the lateral shear plate attachment and 2) the drop-in shear plate attachment. The drop-in ; shear plate concept did not perform as intended, as the vertical release load was too high and the lateral release loads were ; too low. Alternatively, the lateral shear plate design provided vertical and lateral release loads very similar to the original ; bolted, tabbed bracket V10. However, concerns were raised over the lack of rigidity in the attachment and the ease of ; installations of the shear plate. Thus, it was recommended that the lateral shear plate design be modified and reevaluated ; prior to use in the full-scale system. ; Dynamic bogie or component testing of the 3/16-in. (4.8-mm) diameter brass keeper rod provided a quick cable release ; similar to the previous design. The increased strength of the rod also showed promise in distributing impact loads more ; uniformly to adjacent posts and helping reduce system deflections. Thus, the 3/16-in. (4.8-mm) diameter brass rod was ; recommended for use in the new high-tension cable barrier system
  More +
• Format:
  PDF
• Funding:
  TPF-5(193) Supplement #44;TPF-5(193) Supplement #64
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/29163/dot_29163_DS1.pdf
• File Type:
  [PDF - 19.43 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:6efbb4b168bde5ac10071f0cdf50fa29309e89e4cdd63fdb39fd6bebe1beaf05c28db579a6da51f1d562b4e29ebac284628f4f579a85c162eaf9aade1c086816