基于仿真计算下的水库心墙坝体动力抗震特性分析研究

Study on Dynamic Seismic Characteristics of Reservoir Core Dam Based on Simulation Calculation

为研究水库心墙坝体动力抗震特性,引入EI Centro地震波模拟荷载,计算分析了不同方向地震波对水库心墙坝体动力稳定性影响。分别分析了XX、 YY、 ZZ三个地震加速度方向上心墙坝体位移响应特征;并研究了心墙坝体位移响应值与地震加速度频谱量级关系;结果表明:峰值位移均出现在距坝顶8m处,抗震设计应着重加固。

In order to study the dynamic seismic characteristics of reservoir core dam,EI Centro seismic wave simulation load is introduced to calculate and analyze the influence of seismic wave in different directions on the dynamic stability of reservoir core dam.The displacement response characteristics of core wall dam in XX,YY and ZZ seismic acceleration directions are analyzed respectively,and the relationship between the displacement response value of core wall dam and the magnitude of seismic acceleration spectrum is studied.The results show that the peak displacement occurs at 8m away from the dam crest and the seismic design should focus on reinforcement.The research results can provide a reference for the dynamic seismic design and analysis of reservoir dam structures.