MGS dynamic deflections and working widths at lower speeds.

Details

• Creators:
  Weiland, Nicholas A. ; Stolle, Cody S. ; Reid, John D. ; Faller, Ronald K. ; Bielenberg, Robert W. ; Lechtenberg, Karla A.
• Corporate Creators:
  Midwest Roadside Safety Facility
• Corporate Contributors:
  United States. Federal Highway Administration
• Subject/TRT Terms:
  • Guardrails
  • Deflection
  • Impact studies
  • Simulation
  • Speed
  • Highway safety
• Publication/ Report Number:
  TRP-03-314-15
• Resource Type:
  Tech Report
• Geographical Coverage:
  Nebraska
• Corporate Publisher:
  Nebraska. Dept. of Roads
• Abstract:
  The Midwest Guardrail System (MGS) has been full-scale crash tested in many configurations, including ; installations adjacent to slopes, with different types of wood posts, with and without blockouts, for culvert and bridge ; applications, and at high flare rates. Although the performance of the MGS and the dynamic deflection and working width ; of the barrier have been examined, little is known about the dynamic deflection and working width of the MGS when ; impacted at lower speeds. The MGS is a relatively low-cost barrier, and the Test Level 3 (TL-3) version could be installed ; for TL-2 and TL-1 applications. The barrier is expected to capture or redirect errant vehicles impacting at speeds less than ; or equal to those used for crash testing according to TL-3of the Manual for Assessing Safety Hardware (MASH). ; Accurate dynamic deflections and working widths of the MGS when impacted at lower speeds are critical for the ; safe placement of guardrail to reduce the likelihood of vehicle impact with a shielded hazard in the Zone of Intrusion (ZOI) ; for use on level terrain and in combination with curbs. LS-DYNA computer simulation models of a 2007 Chevrolet ; Silverado impacting both a tangent MGS and MGS in combination with a curb at a 6-ft 3-in. (1.9-m) post spacing (i.e., ; standard post spacing) were calibrated against previous crash tests. Then, the model was simulated with two lower speeds ; and at five impact locations with a conservative soil model to determine the maximum dynamic deflection and working ; width of the system at TL-1 and TL-2 impact conditions of MASH.
  More +
• Format:
  PDF
• Funding:
  TPF-5(193) Supplement #69
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/29625/dot_29625_DS1.pdf
• File Type:
  [PDF - 4.15 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:8ca198d83a338c738c5e3ebcdfac2f5562434b72f5fd093a29e900c393241a1bfc025da7165a8b6c949572695fdf8c8c195fd334ce4abf085541fcfbb6ce8ed2