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Development of Non-Redirective Crash Cushion for Bridge Piers Considering Occupant Safety

탑승자 안전도를 고려한 교각 방호시설물 개발에 관한 연구

  • Received : 2018.03.24
  • Accepted : 2018.08.20
  • Published : 2018.10.31

Abstract

The traffic accident types are largely classified into vehicle to vehicle accident, vehicle-to-person accident and single-vehicle. Especially, the single-vehicle accident types are severe when the vehicle crashed into road facilities such as bridge, piers, utility poles. The severity of single-vehicle accidents are ten times higher than that of all other accidents types. It is needed to consider to reduce accident severity. This study was conducted to develop crash worthy safety design facility to ensure the vehicle occupant safety. The simulation and the crash tests were conducted for assessment of the safety performance to check the criteria of CC2(Crash Cushion 2) level. THIV(Theoretical Head Impact Velocity) and PHD(Post-impact Head Deceleration) were used to assess occupant impact severity for crashes. The non-redirection collision test conditions for 900 kg and 1,300 kg-head on crash tests, 900 kg-1/4 offset crash tests, 1,300 kg-head on crash test with $15^{\circ}$angle were conducted. The simulation and experiment test result showed that THIV values were below 44 km/h criterion, PHD values were below the 20G. The development non-redirective crash cushion is expected to be used for the fixed object such as bridge piers for assuring occupant safety.

Keywords

crash cushion;PHD(Post-impact Head Deceleration);crash test;simulation;THIV(Theoretical Head Impact Velocity)

Acknowledgement

Supported by : 국토교통부