| 地震诱发黄土滑坡的滑距估测 |
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| 引用本文： | 卢育霞,石玉成,陈永明,刘红玫.地震诱发黄土滑坡的滑距估测[J].西北地震学报,2006,28(3):248-251. |
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| 作者姓名： | 卢育霞 石玉成 陈永明 刘红玫 |
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| 作者单位： | 中国地震局地震预测研究所兰州科技创新基地,甘肃,兰州,730000;中国地震局兰州地震研究所,甘肃,兰州,730000 |
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| 基金项目： | 地震科学联合基金;中国地震局兰州地震研究所科研基金 |
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| 摘 要： | 认为用坡体波动振荡效应来解释地震滑坡的形成是合理的,地震动使坡体波动振荡产生的启程剧发速度会直接影响到滑后行程速度和整个滑动土体的滑移距离。最大滑距可分为地震时坡体波动振荡产生的位移和地震波动停止后滑坡的滑移距离两部分,先采用Newmark有限滑动位移分析模型计算前者的永久地震位移,再进一步计算后者。经海原地震滑坡实例计算,文中地震滑坡滑距计算公式实用有效。
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| 关 键 词： | 地震滑坡 滑距 Newmark分析模型 黄土地区 |
| 文章编号： | 1000-0844(2006)03-0248-04 |
| 收稿时间： | 03 20 2006 12:00AM |
| 修稿时间： | 2006年3月20日 |
Slippage Estimation of the Loess Landslide Triggered by Earthquake |
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| LU?Yu-xi,SHI?Yu-cheng,CHENG?Yong-ming and LIU?Hong-mei.Slippage Estimation of the Loess Landslide Triggered by Earthquake[J].Northwestern Seismological Journal,2006,28(3):248-251. |
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| Authors: | LU?Yu-xi SHI?Yu-cheng CHENG?Yong-ming and LIU?Hong-mei |
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| Institution: | 1, Lanzhou Base of Institute of Earthquake Prediction, CEA,Lanzhou 730000,China; 2. Lanzhou Institute of Seismology, CEA,Lanzhou 730000,China |
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| Abstract: | It is a reasonable explanation that the slope mass vibrating process makes the slope deformed and failed during earthquake,and initial violent-slide velocity of the slope mass will affect the sliding velocity and all the slippage later.The maximum slippage could be divided into two parts for calculation,which are the slope displacement during earthquake vibration and the sliding distance after earthquake.The former will be computed by Newmark analytical method,and the later will be done further when permanent displacement has occurred.A landslide formed in Haiyuan earthquake in 1920 is taken as an example.The calculating result proves that the formulae are practical and effective. |
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| Keywords: | Earthquake landslide Slippage Newmark analytical method Loess area |
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