地形地貌条件对边坡动力响应规律的影响  

Influence of Topographic and Geomorphic Conditions on the Dynamic Response of Slope Acceleration

作　　者：唐为民 马淑芝[2] 刘小浪[2] 赵轩 TANG Wei-min;MA Shu-zhi;LIU Xiao-lang;ZHAO Xuan(Guizhou Transportation Planning Survey&Design Institute Co.,Ltd.,Guiyang550081,China;Faculty of Engineering,China University of Geosciences,Wuhan430074,China)

机构地区：[1]贵州省交通规划勘察设计研究院股份有限公司,贵阳550081 [2]中国地质大学(武汉)工程学院,武汉430074

出　　处：《长江科学院院报》2019年第11期98-103,109,共7页Journal of Changjiang River Scientific Research Institute

基　　金：国家自然科学基金项目(41672309);中国地质大学(武汉)教学实验室开放基金项目(SKJ2015092);国家级大学生创新创业训练项目(201610491072)

摘　　要：为研究边坡地形地貌条件对土质边坡动力响应规律的影响以及边坡地震反应机理,利用地震模拟振动台,建立不同坡面形态条件下的土质边坡模型进行振动台模型试验。试验结果表明:土质边坡地震动力响应具有高程放大效应,边坡加速度峰值(PGA)放大系数会随高程增加而增大,水平方向坡内土体较坡面土体对地震动荷载放大更为显著;土质边坡地形地貌条件对地震动荷载放大作用有较大影响,边坡坡度越大,边坡形态越复杂,其对地震动荷载放大效应越显著,边坡土体的变形破坏也越显著。In this paper,we designed and conducted a set of shaking table model tests of soil slope according to the topographic and geomorphologic conditions of the slope.Based on the results,we examined the influence of the topographic and geomorphologic conditions on the dynamic response of the soil slope and studied the reaction mechanism of slope under earthquakes.Results demonstrated that the dynamic response of soil slope was closely related to the elevation of the slope.The amplification coefficient of peak ground acceleration(PGA)along the slope surface and in the vertical direction of the slope increased with the elevation increasing,and the amplification effect of soil inside the slope to earthquake waves was more significant than that of slope surface in the horizontal direction.The topographic and geomorphologic conditions of the soil slope had great influence on the amplification effect of earthquake waves.Generally,if the slope is steeper and more complex in shape,the amplification coefficient of PGA and the deformation of the slope will be greater.

关 键 词：土质边坡 地形地貌 振动台模型试验 边坡形态 动力响应 PGA放大系数 

分 类 号：TU435[建筑科学—岩土工程]