Damages of the Shaohuoping road tunnel near the epicentre
Damages of the Shaohuoping road tunnel near the epicentre
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DOI：
10.1080/15732479.2011.647038
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发表时间：
2013-05
影响因子：
3.7
通讯作者：
Haitao Yu;Yong Yuan;Xian Liu;Yu-wen Li;S. Ji
中科院分区：
文献类型：
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作者：
Haitao Yu;Yong Yuan;Xian Liu;Yu-wen Li;S. Ji
在2008年中国汶川地震中，四川省的国道、隧道等众多基础设施都受到了不同程度的破坏。位于震中附近的韶火坪公路隧道是典型的受损隧道。根据现场勘察资料，总结了韶火坪隧道不同部位的损伤模式。结果表明，隧道不同部位混凝土衬砌出现了不同程度的开裂、剥落等损伤。采用本文提出的有限元数值模型，对关键部位、门户截面和主体部分的地震损伤进行了模拟分析。通过有限元模拟，研究了竖向运动对隧道地震反应的影响。将模拟响应与隧道不同部位的地震结构损伤现场调查结果进行了比较。结果表明，所建立的有限元模型能够可靠地预测隧道的损伤机理。结果表明，隧道不同部位的破坏主要受水平地震动的控制，但受垂直地震动的影响，隧道的破坏程度可能更大。
Numerous infrastructures including national roads, tunnels, etc. in Sichuan Province were damaged to various extents in China's Wenchuan earthquake in 2008. The Shaohuoping road tunnel, near the epicentre of the earthquake, was the typical damaged one. The damage modes of different parts of the Shaohuoping tunnel were summarised based on the spot investigation data. It was found that various damages involving cracking and spalling of concrete lining were observed on different parts of the tunnel. The earthquake damages of critical positions, portal section and body portion, were simulated and analysed by finite element numerical model proposed in this paper. Influences of vertical motion on seismic responses of the tunnel were also studied by means of the finite element simulation. The simulation responses were compared with the spot investigations of earthquake structural damages to different parts of the tunnel. The comparisons showed a good agreement, which indicated that, the damage mechanism of the tunnel can be predicted reliably by the proposed finite element model. Furthermore, the results show that the damage of different parts of the tunnel is mainly controlled by horizontal ground motions, but the tunnel may suffer more damages with the effect of the vertical motion.