以福州盆地为对象,基于ABAQUS有限元并行计算平台,建立二维非线性分析模型对地表地震动效应进行分析。结果表明,当输入地震动一定时,地表PGA随软弱层埋深变浅而增大,当埋深至一定深度时有减震作用;随软夹层埋深增加,地表加速度谱渐呈出多峰特征,特征周期增大;软夹层厚度对地表PGA影响与其埋深及输入地震动有关。 Taking Fuzhou basin as an example, based on ABAQUS finite element parallel computing platform, a two-dimensional nonlinear analysis model was established to analyze the ground motion effect. The results show that when the input ground motion is constant, the surface PGA increases with the shallow depth of the weak layer, and decreases when the depth reaches a certain depth. As the buried depth of the soft interlayer increases, the surface acceleration spectrum shows a multi-peak The characteristics and the characteristic period increase. The influence of soft interlayer thickness on PGA is related to its buried depth and input ground motion.