长周期地震动三维有限元数值模拟方法

A method of numerical simulation for long-period strong ground motion by 3-D FEM

采用数值方法对长周期地震动进行模拟已成为当前强地面运动预测的研究方向之一。本文提出了一种有限元并行计算的高效地震动数值模拟方法,可以同时考虑震源、传播途径和场地条件对地震动的影响,并根据昆明地区未来可能发生的设定地震对昆明市的影响地震动进行了预测。这一方法可以应用于国内已探测的发震活断层进行地震危害性评价工作。

In this paper, a highly effective 3-D explicit finite element combining parallel calculation method is presented, in which, the magnitude, the source rupture process, the influence of underground tectonics and the soil sediment structure are considered. According to the scenario earthquakes of Kunming zone, the long-period （T 〉 1 s） strong ground motion of Kunming city is estimated. This method could be used to earthquake disaster evaluation for the regions where the survey of seismogenic active fault hsa been finished.