节点文献

基于元胞自动机的地震触发崩塌滑坡分布规律

Distribution Law of Landslides Triggered by Earthquake Based on Cellular Automata

  • 推荐 CAJ下载
  • PDF下载
  • 不支持迅雷等下载工具,请取消加速工具后下载。

【作者】 黄艺丹姚令侃郭沉稳

【Author】 HUANG Yidan1,YAO Lingkan1,2,3,GUO Chenwen1(1.School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,China;2.MOE Key Laboratory of High-Speed Railway Engineering,Chengdu 610031,China;3.Road and Railway Engineering Research Institute,Sichuan Key Laboratory of Seismic Engineering and Technology,Chengdu 610031,China)

【机构】 西南交通大学土木工程学院高速铁路线路工程教育部重点实验室抗震工程技术四川省重点实验室道路与铁道工程抗震技术研究所

【摘要】 为了从物理角度对地震触发崩塌滑坡分布规律的机理进行诠释,通过汶川震区典型路段考察和遥感资料解译发现:位于IX度地震烈度区,崩塌滑坡方量与出现频率之间存在良好的负幂律关系;在X度区,崩塌滑坡面积与出现频率的关系仍可用负幂律描述;在XI度区,这一关系转为对数正态分布.元胞自动机模拟表明:以扰动值递增模拟地震强度的增大,沙堆模型的动力特性也经历了幂律—幂律弱化—对数正态分布的演变过程,从而在自组织临界性的概念框架下,证明了上述不同烈度区地震触发崩塌滑坡分布概型的演变规律具有普适性,为汶川地震崩塌滑坡编目以及高烈度地震山区灾势预估等提供了科学依据.

【Abstract】 In order to interpret the mechanism of distribution of landslides triggered by earthquake from a physical point of view,typical sections in earthquake zones in the Wenchuan earthquake were investigated,and related remote sensing data was interpreted.The result shows that there exists a negative power-law relationship between the volume and number of landslides in IX seismic intensity zone of the Wenchuan earthquake,and the same is true between the area and frequency of landslides in X intensity seismic zone.However,the relationship changes into a lognormal distribution in XI seismic intensity zone.In addition,cellular automata was used to simulate landslides.The cellular automaton simulation reveals that with the change of disturbance intensity,the dynamical mechanism of sand-pile model is from a strong power-law to a weak power law,then to a lognormal distribution.Under the conceptual framework of self-organized criticality,it is proved that the distribution model of landslides in different seismic intensity zones has a universal law.The research results may not only be used to guide inventory of landslides triggered by the Wenchuan earthquake,but also provide a scientific basis for mountain disaster assessment in high seismic intensity zones.

【基金】 国家自然科学基金资助项目(41172321);国家自然科学基金重点项目(41030742);铁路部科技研究开发计划课题(2011G019-B)
  • 【文献出处】 西南交通大学学报 ,Journal of Southwest Jiaotong University , 编辑部邮箱 ,2013年04期
  • 【分类号】P642.22
  • 【被引频次】9
  • 【下载频次】276
节点文献中: