碾压混凝土重力坝的地震动力反应谱分析

The seismic response spectrum analysis of roller compacted concrete gravity dam

以120 m碾压混凝土重力坝为例,建立了有限元模型,模态分析获得了坝体9阶固有自振频率,并将反应谱spectrum分析与模态扩展modal expass分析相结合,得到了坝体地震动力荷载下的应力、位移值,分析了最大拉应力结果及对应坝体位置,对碾压混凝土重力坝的设计、施工等有着重要的工程实际意义。

The finite element model of the 120 m RCC gravity dam is established.9 order inherent natural frequencies are obtained,the response spectrum and the modal expass analyses are combined to get the stress,displacement values under the seismic dynamic load,analysis the maximum tensile stress and the corresponding position,has an important practical significance for the design,construction of RCC dam.