粉煤灰坝非平稳有效应力随机地震反应分析

考虑地震动过程的随机性和非平稳性，考虑粉煤灰动力特性的非线性和 坝内孔隙水压力增长对动剪模的影响，将线性系统非平稳反应的时域模态分 析技术与非线性土结构平稳反应的等价线性化法相结合，对一座实际的粉煤 灰坝进行了有效应力非平稳随机地震反应分析；计算的液化区与模型试验结 果符合良好。

Nonstationary stochastic seismic response analysis with effective stress for fly ash embankment

The earthquake motions are simulated as the nonstationary random process. The effectiveness of nonlinear dynamic property of fly ash and increases of pore pressures in dam on the dynamic shear modulus are taken into account. The analysis technique in time domain for. nonstationary response of linear system is combined with the equivalent linearization procedure for stationary response of soil structures. The nonstationary effective stress response analyses are performed to a fly ash embankment. The numerical results are in good agreement with the results from model tests.