Dynamic Evaluation of MGS Stiffness Transition With Curb

Details

• Creators:
  Winkelbauer, Bradley J. ; Putjenter, Joseph G. ; Rosenbaugh, Scott K. ; Lechtenberg, Karla A. ; Bielenberg, Robert W. ; Faller, Ronald K. ; Reid, John D.
• Corporate Creators:
  Midwest Roadside Safety Facility
• Corporate Contributors:
  United States. Federal Highway Administration ; Nebraska. Dept. of Roads
• Subject/TRT Terms:
  Curbs Guardrails Guardrail Transition Sections Highway Safety Impact Tests Stiffness Thrie Beams
• Publication/ Report Number:
  TRP-03-291-14
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• Corporate Publisher:
  Midwest Roadside Safety Facility
• Abstract:
  A W-beam to thrie beam stiffness transition with a 4-in. (102-mm) tall concrete curb was developed to connect the 31-in. (787-mm) Midwest Guardrail System (MGS) to a previously-approved thrie beam approach guardrail bridge transition system. This stiffness transition was configured with standard steel posts that are commonly used by several State Departments of Transportation. The toe of a 4-in. (102-mm) tall sloped concrete curb was placed flush with the backside face of the guardrail and extended the length of the transition region. Three full-scale crash tests were conducted according to the Test Level 3 (TL-3) safety standards provided in AASHTO’s Manual for Assessing Safety Hardware (MASH). During the first test, MASH test no. 3-20, the 1100C small car extended and wedged under the rail and contacted posts while traversing the curb. Subsequently, the W-beam rail ruptured at a splice location. A repeat of MASH test no. 3-20 was performed on an updated design which used a 12-ft 6-in. (3.81-m) long, nested W-beam rail segment upstream from the W-beam to thrie beam transition element. The 1100C small car was successfully contained and redirected. During MASH test no. 3-21, a 2270P pickup truck was successfully contained and redirected. Following the crash testing program, the system was deemed acceptable according to the Test Level 3 (TL-3) safety performance criteria specified in MASH.
• Format:
  PDF
• Funding:
  TPF-5 (193) Supplement # 58 and 63
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:4f447891b3adfd508ff4504ad17453baaa82d2be2b2bdea58f5f315f0234b96a7bef6219c46bcc68c0de5a4142f9a4e5288e2c3ee7209b29dbcb514221141092
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/37631/dot_37631_DS1.pdf
• File Type:
  [PDF - 43.52 MB ]