论文部分内容阅读
抗震设计反应谱是土石坝动力计算分析的主要依据,其中反应谱参数的合理确定是工程抗震安全分析的重要环节之一。基于《水工建筑物抗震设计规范》设计反应谱,依托某心墙堆石坝,初步探讨了反应谱参数对坝体动力反应及地震永久变形的影响。结果表明,增加地震动峰值加速度、增大动力放大系数最大值、延长反应谱特征周期均会使坝体的加速度反应和永久变形在一定程度上增大,由此对反应谱参数的选择提出了一些合理化建议。
Seismic design response spectrum is the main basis of dynamic calculation of earth-rock dam. One of the important links of earthquake-resistant safety analysis is the reasonable determination of response spectrum parameters. Based on the design response spectrum of “Seismic Design Code for Hydraulic Structures” and relying on a core-wall rockfill dam, the effects of response spectrum parameters on the dynamic response and permanent deformation of the dam are discussed. The results show that increasing the peak acceleration of ground motions, increasing the maximum value of dynamic amplification factor, and prolonging the characteristic period of the response spectrum all increase the acceleration response and permanent deformation of the dam to a certain extent. Therefore, the choice of response spectrum parameters Some rationalization suggestions.