| 汶川地震中小鱼洞大桥的变形破坏特征与机理 |
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| 引用本文： | 苏生瑞,李松,郝莉莉,梅海.汶川地震中小鱼洞大桥的变形破坏特征与机理[J].灾害学,2011(4):19-23. |
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| 作者姓名： | 苏生瑞 李松 郝莉莉 梅海 |
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| 作者单位： | 长安大学地质工程系; |
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| 基金项目： | 国家自然科学基金项目(40534021); 中国地质调查局项目(1212010914025) |
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| 摘 要： | 在现场调查的基础上,研究了汶川地震中小鱼洞大桥的变形破坏现象,总结了变形破坏的特点,分析了发生变形破坏的机理。小鱼洞大桥在汶川地震中表现出复杂多样的变形破坏现象,包括梁体塌落,引线段断裂、形成断坎,边坡坍塌,路面纵向拉裂,盖梁与桥台之间右行错动,伸缩缝拉开并发生左行错动和桥台搭板移位等。小鱼洞大桥变形破坏的特点主要表现为挤压与拉张现象并存、左行与右行现象并存和水平向振动与竖向振动并存。地震时小鱼洞大桥受到了复杂的力学作用,不仅有水平挤压作用,而且有竖向和水平向的振动作用以及水平剪切作用。
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| 关 键 词： | 小鱼洞大桥 汶川地震 变形破坏 机理 小鱼洞断裂 |
Characteristics and Mechanism of Deformation and Failure of Xiaoyudong Bridge Caused by Wenchuan Earthquake |
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| Su Shengrui,Li Song,Hao Lili , Mei Hai.Characteristics and Mechanism of Deformation and Failure of Xiaoyudong Bridge Caused by Wenchuan Earthquake[J].Journal of Catastrophology,2011(4):19-23. |
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| Authors: | Su Shengrui Li Song Hao Lili Mei Hai |
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| Institution: | Su Shengrui,Li Song,Hao Lili and Mei Hai(Chang'an University,Department of Geological Engineering,Xi'an 710054,China) |
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| Abstract: | On the basis of site investigation,deformation and failure of Xiaoyudong Bridge caused by Wenchuan earthquake are studied,its characteristics are summarized and mechanism is analyzed.The bridge showed complicated and diversified phenomena of deformation and failure,including collapse of beams,lead section segment and fault scarp formation,slope collapse,longitudinal rupture of road surface,right-lateral dislocation between cap beam and bridge abutment,extension and left-lateral dislocation of expansion join... |
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| Keywords: | Xiaoyudong Bridge Wenchuan earthquake deformation and failure mechanism Xiaoyudong fault |
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