• ISSN 0258-2724
  • CN 51-1277/U
  • EI Compendex
  • Scopus
  • Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
  • Chinese S&T Journal Citation Reports
  • Chinese Science Citation Database
Volume 29 Issue 6
Nov.  2016
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Article Contents
GU Xiang, YU Zhixiang, ZHAO Lei, XU Hu. Influence of Rockfall Impact Energy on Mountain Bridge Damage[J]. Journal of Southwest Jiaotong University, 2016, 29(6): 1131-1137. doi: 10.3969/j.issn.0258-2724.2016.06.012
Citation: GU Xiang, YU Zhixiang, ZHAO Lei, XU Hu. Influence of Rockfall Impact Energy on Mountain Bridge Damage[J]. Journal of Southwest Jiaotong University, 2016, 29(6): 1131-1137. doi: 10.3969/j.issn.0258-2724.2016.06.012

Influence of Rockfall Impact Energy on Mountain Bridge Damage

doi: 10.3969/j.issn.0258-2724.2016.06.012
  • Received Date: 11 Nov 2015
  • Publish Date: 25 Dec 2016
  • To study the great bridge damage caused by rockfall impact, the damage constitutive model of holmquist-johnson-cook was established. The rockfall impact on typical brdiges was analyzed by the non-linear explicit dynamic software LS-DYNA. Then, the rockfall impact energy was graded, and two kinds of protective measures were compared, i.e., adding steel plate tube and thickening concrete protective layer. The results show that the potential dangerous rockfall impact energy is 2 500 kJ. If adding steel plate tube is adopted, the penetration rate decreases from 37.78% to 13.89%, and the volumetric damage of concrete is decreased by 30%. If thickening concrete protective layer is adopted, the penetration rate decreases to 6.11%, and the the volumetric damage of concrete is decreased by 76%.

     

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