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A Comparison Study of Model Reduction Method with Direct Impact Analysis of Truck-column Collision

모델축소법을 이용한 교각-차량 충돌변위 예측 및 직접충돌해석법과의 비교연구

  • Received : 2015.10.13
  • Accepted : 2015.11.03
  • Published : 2015.12.29

Abstract

Current design codes such as AASHTO LRFD or Korean Highway Bridge Design Code recommend of using static force for designing bridge column against vehicle collisions. However, there was an accident that the bridge was collapsed shortly after vehicle impact on bridge pier in Nebraska(near Big Spring, 2003). It was found that the second largest cause of bridge collapse is collision after hydraulic causes. It can be thought that the possibility of truck-bridge collision are getting increasing as the size of truck increases and traffic condition are becoming improved. However, dynamic behavior under the impact loading seldom considered in bridge design procedure due to computational cost and time. In this study, in order to reduce the computational cost for dynamic impact analysis, model reduction method was developed. Obtained results of residual displacement were compared with the results of direct impact simulations.

Keywords

model reduction;concrete bridge column;vehicle-column collision;direct impact analysis;in-direct impact analysis

References

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Acknowledgement

Supported by : 한국연구재단