【摘要】 选用攀枝花-会理地震波,通过基线校正和高频滤波,作为实际地震动输入,利用FLAC3D软件对某水电站大型地下洞室群进行了地震作用下应力传播特性的研究。数值分析结果表明,洞室群周围应力时程的变化趋势与输入加速度时程的变化趋势相似,但由于地震波的传播需要一定的时间,因此存在一定的滞后效应。洞室边墙出现了一定面积的拉应力区,随着输入加速度的增大,拉应力区的范围有所扩展,但是扩展的范围不大。所得结果对大型地下洞室群地震动传播特征问题的研究具有一定的参考意义。更多还原

【Abstract】 One of the Panzhihua-Huili earthquake records,by baseline correction and high frequency filter,was selected as the actual seismic input for numerical simulation of horizontal seismic acceleration propagation in large underground cavern group of some hydraulic power station by software FLAC3D.The results show that the stress around caverns vary similarly with input acceleration.The tension zone area around caverns increases with acceleration to some extent.This research results can give a reference to the study on the seismic wave propagation in large underground cavern group.更多还原