| 地震作用下滑坡永久位移预测 |
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| 引用本文： | 罗渝,何思明,吴永,何尽川.地震作用下滑坡永久位移预测[J].自然灾害学报,2012(1):117-122. |
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| 作者姓名： | 罗渝 何思明 吴永 何尽川 |
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| 作者单位： | 中国科学院山地灾害与地表过程重点实验室;中国科学院水利部成都山地灾害与环境研究所;中国市政工程西南设计研究总院 |
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| 基金项目： | 国家科技支撑计划项目(2011BAK12B03);国家重点基金项目(40830742) |
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| 摘 要： | 在地震区滑坡防治结构的抗震设计中,滑坡体自身的稳定安全性可利用其地震作用下产生的永久位移直接判断,可见对其地震永久变形的预测至关重要。因此,以极限分析上限定理为基础,分别针对平移式和旋转式两种滑坡滑移形式,推导出这两种滑移形式下滑坡体产生永久位移的临界加速度,考虑地震输入能量及结构能量耗散之间的平衡关系并建立预测地震作用下滑坡永久位移的计算方法。最后,通过算例表明其合理性。
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| 关 键 词： | 滑坡 永久位移 地震 上限定理 |
Permanent displacement forecast of landslide under seismic loading |
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| LUO Yu,HE Siming,WU Yong,HE Jinchuan.Permanent displacement forecast of landslide under seismic loading[J].Journal of Natural Disasters,2012(1):117-122. |
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| Authors: | LUO Yu HE Siming WU Yong HE Jinchuan |
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| Institution: | 1.Key Laboratory of Mountain Hazards and Surface Process,Chinese Academy of Science,Chengdu 610041,China; 2.Institute of Mountain Hazards and Environment,Chinese Academy of Sciences,Chengdu 610041,China; 3.Southwest Municipal Engineering Design & Research Institute of China,Chengdu 610081,China) |
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| Abstract: | Seismic permanent displacement forecast is quite important in seismic design of landslide prevention and control structure in earthquake zone.The stability of landslide mass itself can be directly judged from this permanent displacement.Therefore,the critical accelerations that cause permanent displacement of landslide mass for two types of slide,i.e.,translation and revolution were deduced based on upper bound theorem of limit analysis.Considering the balance relationship between seismic input energy and structural energy dissipation,the calculation method that predict landslide permanent displacement under earthquake action was established.Finally,an example was given to prove the reasonability of the method. |
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| Keywords: | landslide permanent displacement earthquake upper bound theorem |
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