摘要
针对拟修建的某尾矿坝的动力响应问题,结合该尾矿坝的勘察资料,利用有限元对其在2种地震动输入下的动力特性进行分析。综合分析有效应力、动位移、永久位移、应力水平、水平加速度放大系数等物理量的分布及变化规律,对尾矿坝在两种地震动作用下的抗液化能力进行了评价。结果表明,该尾矿坝在上述动荷载作用下应力水平较低,具有较大安全储备,且坝内孔隙水压力维持在合理范围,坝内土单元不会发生液化。
To study the dynamic characteristics of one proposed tailing dam,its dynamic characteristics with two inputs of seismic motion were studied based on its survey data according to finite element method. The physical variables and their variations,such as effective stress,dynamic displacement,permanent displacement,stress level,the coefficient of horizontal acceleration amplification of the tailings dam,were analyzed. At the same time,liquefaction resistances under two seismic loading effects were also evaluated separately. The results indicated that the tailing dam under the above dynamic load effects was at lower stress levels,with a large safety margin,and the pore water pressure in the dam was in a reasonable range,therefore the soil elements in the dam would not liquefy.
出处
《四川大学学报（工程科学版）》
EI
CAS
CSCD
北大核心
2016年第S1期33-38,共6页
Journal of Sichuan University (Engineering Science Edition)
基金
国家自然科学基金资助项目(51009103)
关键词
尾矿坝
地震动
动力特性
液化判定
tailings dam
seismic motion
dynamic characteristics
liquefaction evaluation
