某尾矿坝地震动力加速度反应特性研究  

Study on dynamic response characteristics of seismic acceleration of a tailings dam

作　　者：李宗伟[1] 周庆瑜 陈锋彪 

机构地区：[1]长春工程学院,吉林长春130012 [2]水利部建设管理与质量安全中心,北京100038 [3]山东省东明县水务局,山东菏泽274500

出　　处：《水利水电技术》2015年第12期105-108,113,共5页Water Resources and Hydropower Engineering

摘　　要：采用DGZ-1型多功能共振柱试验机进行了动剪切模量比和阻尼比试验,采用SDZ-1型双向电磁振动三轴仪进行了动强度试验,获得了土体的物理力学指标。应用等效线性粘—弹性模型对某尾矿坝进行地震动力特性分析。结果表明,坝体对地震加速度的反应随着高程的增加而增大,最大加速度反应发生在坝顶位置;坝体对地震的反应在相同高程不同位置差别不大,坝体外边坡和坝体内部的区别不大;坝体对地震水平向加速度反应比竖直向加速度反应大,坝体的动力破坏主要取决于地震的水平运动。The dynamic shear modulus ratio and damping ratio tests are made with DGZ - 1 multi-function resonant column testing machine and the dynamic strength tests are carried out by SDZ - 1 bidirectional electromagnetic vibration triaxial apparatus, and then the relevant physical and mechanical properties of soil are obtained. The result shows that the response of the dam body to the seismic acceleration is increased along with the increase of the elevation, thus the maximum acceleration response occurs at the crest of the dam. The differences of the response of the dam body to the seismic acceleration at the same elevations are not so large, no matter inside of the dam body or outside of outer slope. The response of the dam body to the acceleration is larger horizontally than vertically, while the dynamic damage of the dam body mainly depends on the horizontal movement of earthquake.

关 键 词：等效线性模型 加速度时程 地震动力反应 尾矿坝 

分 类 号：TV312[水利工程—水工结构工程]