地震滑坡启程剧动的机理研究及离散元模拟  

MECHANISM OF SET-OUT VIOLENT-SLIDE OF SLOPE MASS DURING EARTHQUAKE AND ITS SIMULATION BY USING DISCRETE ELEMENT METHOD

作　　者：毛彦龙[1] 胡广韬[1] 毛新虎[1] 石耀武[1] 

机构地区：[1]国土资源部岩土工程开放研究实验室,长安大学地质工程系710054

出　　处：《工程地质学报》2001年第1期74-80,共7页Journal of Engineering Geology

基　　金：中科院地质所工程地质力学开放研究实验室

摘　　要：论证并探讨了地震动诱发滑坡体启程剧动的机理。研究认为 ,地震动对滑坡形成的影响 ,主要是通过坡体波动振荡来产生 ;坡体波动振荡在斜坡岩土体变形破坏过程中产生三种效应 :累进破坏效应、启动效应和启程加速效应 ;并以骆驼岭滑坡为例 ,采用离散元对斜坡在地震作用下的变形破坏过程进行数值模拟分析 ,得出了一些既有理论研究意义 ,又有实际应用价值的论断。The mechanism of set out violent slide of slope mass during earthquake is discussed in the paper. The author′s study suggests that there are three effects of the slope mass vibration in its deformation and failure process during earthquake. They are progressive failure, set out slide, and acceleration effects. By using discrete element method, the processal of deformation and failure of Luotuoling landslide is simulated. The obtained result is of theoretecal and practical signifiance.

关 键 词：滑坡体 累进破坏效应 启动效应 启程加速效应 地震动 数值模拟 变形过程 

分 类 号：P642.22[天文地球—工程地质学] O242.1[天文地球—地质矿产勘探]