论文部分内容阅读
利用三角级数叠加法,考虑到基岩场地的深度衰减效应,生成了大型地下洞室群非平稳人工地震动加速度时程。然后利用动力时程分析法,对大渡河某水电站大型地下洞室群进行了非线性地震动力响应分析,研究在不同频谱人工地震波作用下地应力特征、峰值加速度和频谱对大型地下洞室群位移特征的影响。分析结果表明,地下洞室群相对位移随着侧压力系数和峰值加速度的增加而略有增加,不同频谱的地震波有着截然不同的位移特征。研究成果对高地震烈度区地下洞室群抗震稳定性分析具有一定的借鉴意义。
Using trigonometric series superposition method, taking into account the depth attenuation of bedrock, a series of non-stationary artificial ground motion acceleration time history of large underground caverns are generated. Then dynamic dynamic time-history method is used to analyze the nonlinear dynamic response of large-scale underground caverns at a Dadu River hydropower station. The effects of different stress spectra, peak acceleration and frequency spectrum on the displacement characteristics of large-scale underground caverns Impact. The analysis results show that the relative displacement of underground caverns increases slightly with the increase of lateral pressure coefficient and peak acceleration, and the seismic waves of different frequency spectrum have distinct displacement characteristics. The research results have certain reference significance for the analysis of the seismic stability of underground caverns in high seismic intensity areas.