Journal of South China University of Technology (Natural Science Edition) ›› 2005, Vol. 33 ›› Issue (10): 62-66.

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Comparison of Impact-Counteracting Capability Between Three·-Span and Single·-Span Guardrail Systems

Huang Xiao-qing  Zhang Xiu-li Tang Li-qun   

  1. College of Traffic and Communications,South China Univ.of Tech.,Guangzhou 510640,Guangdong,China
  • Received:2004-11-02 Online:2005-10-25 Published:2005-10-25
  • Contact: 黄小清(1945-)，女，教授，博士生导师，主要从事路桥力学、复合材料力学方面的研究 E-mail:emqhuang@ scut.edu.cn
  • About author:黄小清(1945-)，女，教授，博士生导师，主要从事路桥力学、复合材料力学方面的研究
  • Supported by:

    广东省自然科学基金资助项目(980577，011602)；广东省交通厅资助项目(粤高路技[2000 3207号)

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Abstract:

In order to investigate the impact response of W-beam guardrail system and the influence of the interac-tion among the spans on the deformation and the impacting force,the impact experiment of the semirigid three-span scaled-down guardrail system was designed and executed,with a scaled-down ratio of the specimen size to the ac-tual size of 1:3.75.A comparison between the three-span and single-span guardrail systems was then ca~ied out in such aspects as the deform ation,the impacting force,the velocity and the energy absorption,etc.The contributions of each part of the guardrail system to the energy absorption were finally calculated.The results indicate that the three-span guardrail system absorbs more energy with greater uniformity and rationality than the single-span guard-rail system does.The proposed testing method and the corresponding conclusion lay a foundation for the optimiza-tion of gu ardrails in engineering.

Key words: three-span gu ardrail system, W-beam gu ardrail, impact-counteracting capability, energy absorption