Determination of the maximum MGS mounting height : phase II detailed analysis with LS-DYNA.

Details

• Creators:
  Julin, R.D. ; Reid, J. D. ; Faller, R.K. ; Mongiardini, M.
• Corporate Creators:
  Midwest Roadside Safety Facility
• Corporate Contributors:
  United States. Federal Highway Administration
• Subject/TRT Terms:
  Acceptance Tests Anchoring Crash Injury Research Crash Tests Embedment (Building) Guardrails Height Highway Safety Roads--Guard Fences--Testing Traffic Safety
• Publication/ Report Number:
  TRP-03-274-12
• Resource Type:
  Tech Report
• Geographical Coverage:
  Nebraska
• Edition:
  Final report.
• Corporate Publisher:
  Midwest States Regional Pooled Fund Program ; Nebraska. Dept. of Roads
• Abstract:
  Determination of the maximum Midwest Guardrail System (MGS) mounting height was performed in two phases.
  
  Phase I concentrated on crash testing: two full-scale crash tests were performed on the MGS with top-rail mounting heights
  
  of 34 in. (864 mm) and 36 in. (914 mm), each impacted by 1100C vehicles. Both system heights satisfied the Manual for
  
  Assessing Safety Hardware (MASH) Test Level 3 (TL-3) evaluation criteria for test no. 3-10. Phase I was documented in
  
  the Midwest Roadside Safety Facility (MwRSF) Report No. TRP-03-255-12.
  
  Phase II, the subject of this report, concentrated on a detailed analysis of an increased-height MGS using computer
  
  simulation (Barrier VII and LS-DYNA). It was shown that on level terrain the MGS would satisfy MASH TL-3 evaluation
  
  criteria with rail heights up to 36 in. Also, errant passenger vehicles were successfully contained on approach slopes as
  
  steep as 6:1 when the rail was mounted at 36 in. Also, the 820C vehicle redirection was improved on 8:1 approach slopes
  
  with rail mounting heights as large as 36 in. (914 mm). Furthermore, the effects of various vehicle geometries and their
  
  associated complications were investigated.
  
  Additional full-scale vehicle crash tests are necessary to confirm the simulation results before these taller systems can
  
  be deemed crashworthy according to MASH. Nonetheless, there appeared to be a considerable amount of upside tolerance
  
  for the rail height on the MASH-approved MGS. Evidence of this was given in a prior high-flare-rate study and the current
  
  study.
  
  
• Format:
  PDF
• Funding:
  TPF-5(193)
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:4bbe2b7ed548b8bf8350ec998b38993d9c821abbfb975a24d3075cb648662aecc5c45b42cf8c310b38c91a5798804ed30e8eb3d55b288f8f803cb2bf7e549eb6
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/25599/dot_25599_DS1.pdf
• File Type:
  [PDF - 21.28 MB ]