FINITE-ELEMENT MODELING OF G2 GUARDRAIL

A finite-element model of the AASHTO G2 guardrail (weak-post W-beam) was developed and analyzed under vehicle impact conditions by using LLNL-DYNA3D, a nonlinear, explicit, three-dimensional, public-domain, finite-element code. The modeling procedures and problems encountered are described, and suggestions for further research are given. W-beam and S3 x 5.7 steel post mesh optimization procedures and results are described. A suitable point of fixity for the posts to account for soil effects is determined. W-beam-to-post connections were investigated by three different methods. Impact influence lengths and problems associated with modeling flexible barriers are discussed. The steps taken to assemble a model, including a prebuilt vehicle model, are given. The G2 guardrail was struck with the 820C vehicle model, developed by FHWA, at a speed of 26.69 m/sec (59.7 mph) and an angle of 15.4 degrees.

Language

  • English

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 130-137
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00727324
  • Record Type: Publication
  • ISBN: 0309062241
  • Files: TRIS, TRB
  • Created Date: Oct 21 1996 12:00AM