The Simulation On Vehicle Vs W-beam Guardrail Collisions

W-beam guardrail as an important road-safety protection equipment has been widely usedin highway around China. Nearly1/3accidents are due to the impact between vehicles andguardrails. The research works that vehicles and barriers has a very realistic and greatmeaning.In order to adapt to the needs of highway construction better, China promulgated《Guidelines for Design of Highway safety Facilities》(JTG/T D81-2006) in2006, whichmodified Grab-A-E w-beam guardrail structure type in 《Highway Traffic Safety FacilityDesign and Construction Technology standard》（JTJ074-94）. This article establishes3mmsteeplechase thickness guardrail models and4mm steeplechase thickness guardrail models inHyepermesh, and simulates vehicle crash guardrail using the explicit finite element softwarePAM-CRASH, testes and verify the models are efficacious.Secondly, this article stimulates vehicle crash guardrail. This article stimulates vehiclecrash guardrails with3mm and4mm steeplechase thickness in the same collision conditions,and analysis their defensive capabilities by 《The Evaluation Specification for HighwaySafety Barriers》（JTG/T F83-01-2004）.Simulation results show that the defensive capabilitiesof the old standard guardrail is not good as the new standard guardrail.Finally, basing on the simulation results and the principle of vehicle crash guardrail,this article presents the old standard guardrail rehabilitation programs, and stimulates vehiclecrash the old standard guardrail rehabilitation programs. The results show that bothrehabilitation programs have well oriented capability. But the program with2000mm columnspacing has worse capability of protecting vehicle passengers than the program with3000mmcolumn spacing.