高沥青混凝土心墙坝动力反应特性

Analysis of Dynamic Response Characteristics for Core Rockfill Dam with High Asphalt Concrete

根据官帽舟水电站工程的实际情况,采用三维非线性有限元法,建立了官帽舟沥青混凝土心墙坝的三维有限元模型,仿真了大坝填筑和水库蓄水过程,在获得坝体静力场的基础上,计算分析了大坝在设计地震作用下的动力反应特性,获得了坝体及沥青心墙的加速度、速度、位移反应分布以及坝体单元的安全系数。计算结果表明,大坝在设计三向地震作用下的加速度、速度及位移反应分布符合一般规律,总体上沥青心墙的地震反应不大,且坝体各单元各时刻的安全系数均大于1,坝体在设计地震作用下是安全的。

According to the actual conditions of the Guanmaozhou hydropower station project,the three-dimensional nonlinear finite element method was used to establish a three-dimensional finite element model of the core rockfill dam with asphalt concrete in the Guanmaozhou station.The model simulated the processes of the dam filling and reservoir impounding.Based on the static field of the dam,the dynamic response characteristics of the dam under the design earthquake actions were analyzed.The distributions of acceleration response,velocity response,and displacement response of the core rockfill dam and the safety coefficient of the dam element were obtained.The results showed that the distributions of acceleration response,velocity response,and displacement response of the dam accord with the general law.Overall,the dynamic response of the asphalt concrete core to the earthquake is insignificant and the safety coefficient of each dam element is greater than 1 at all times,and thus the dam is safe under the design earthquake actions.