| 汶川8.0级地震中几座近断层桥梁失效模式的初步探讨 |
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| 引用本文： | 周国良,崔成臣,刘必灯,李小军.汶川8.0级地震中几座近断层桥梁失效模式的初步探讨[J].震灾防御技术,2008,3(4):370-378. |
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| 作者姓名： | 周国良 崔成臣 刘必灯 李小军 |
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| 作者单位： | 中国地震局工程力学研究所,哈尔滨,150080 |
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| 基金项目： | 国家自然科学基金项目
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中国地震局工程力学研究所基本科研业务基金专项(21907802;和地震科学联合基金项目
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| 摘 要： | “5．12”汶川地震造成了多座大型桥梁严重破坏甚至完全垮塌。本文以庙子坪特大桥、百花大桥、小渔洞大桥、石蓑衣大桥、回澜立交桥为例，介绍了结构形式不同的这几座桥梁的破坏模式，初步分析了震害机理。地震动强度过大、强震持续时间过长、近断层特性以及地质灾害等是造成这些桥梁破坏的客观原因；桥梁结构的某些初始缺陷和特殊结构形式导致的受力复杂性是造成地震破坏的主观因素。针对震害特点和破坏机理，本文还探讨了强震区防御桥梁地震破坏应关注的问题。
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| 关 键 词： | 近断层 桥梁 震害特征 防御对策 |
| 收稿时间： | 2008/11/15 0:00:00 |
Failure Modes of Near-fault Bridges in Wenchuan Earthquake |
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| Zhou Guoliang,Cui Chengchen,Liu Bideng and Li Xiaojun.Failure Modes of Near-fault Bridges in Wenchuan Earthquake[J].Technology for Earthquake Disaster Prevention,2008,3(4):370-378. |
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| Authors: | Zhou Guoliang Cui Chengchen Liu Bideng and Li Xiaojun |
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| Institution: | Zhou Guoliang,Cui Chengchen,Liu Bideng , Li Xiaojun (Institute of Engineering Mechanics,China Earthquake Administration,Harbin 150080,China) |
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| Abstract: | Many bridges were damaged in Wenchuan earthquake on 12 May,2008.In this paper,the failure modes of several bridges are introduced such as Miaoziping Bridge,Baihua Bridge,Xiaoyudong Bridge,and Shisuoyi Bridge.Then,the damage mechanism is analyzed.Our results show that the large peak value,long duration and near-fault property of strong ground motion and geologic hazards are the key factors that caused the bridges to failure.Finally,some important problems dealing with reducing damages are discussed. |
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| Keywords: | Near fault Bridge Damage characteristic Countermeasures |
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