摘要
本文对幅值和相位均不一致的非平面地震波入射条件下黏弹性边界的模拟精度进行了验证。首先假定了2个位置不同的点源,基于内位错点源理论,采用谱元法分别模拟了幅值和相位均存在差异的非平面波。随后,建立了二维均匀半空间场地、凸起地形和凹陷地形等3种典型场地模型,针对非平面波输入开展了场地地震响应数值模拟,对比分析了各观测点的位移时程曲线和位移峰值与精确解的吻合程度。结果表明,在所有模型中,各观测点的位移时程曲线与精确解吻合良好;位移峰值的相对误差除个别观测点外均小于1%;黏弹性边界在非平面波入射条件下同样具有较高的模拟精度。
The accuracy of viscoelastic boundaries under the incidence of non-planar seismic waves with inconsistent amplitudes and phases is validated in this paper.First,two point sources located at different positions were assumed,and based on the internal dislocation point source theory,non-planar waves with discrepancies in both amplitude and phase were simulated using the spectral element method.Subsequently,three typical site models,including a two-dimensional uniform half-space,a convex topography,and a concave topography were established to conduct seismic response simulations under non-planar wave input.The displacement time-history curves and peak displacements at various observation points were compared with the corresponding exact solutions.The results show that the displacement time-history curves at all observation points agree well with the exact solutions.Except for a few individual points,the relative errors in peak displacement are all less than 1%.Therefore,the viscoelastic boundary also demonstrates high simulation accuracy under non-planar wave incidence.
作者
丁海平
吴镕锦
宋贞霞
徐正洋
DING Haiping;WU Rongjin;SONG Zhenxia;XU Zhengyang(School of Civil Engineering,Suzhou University of Science and Technology,Suzhou 215011,China)
出处
《地震工程与工程振动》
北大核心
2026年第2期198-207,共10页
Earthquake Engineering and Engineering Dynamics
基金
中国地震局工程力学研究所实验室开放基金项目(2023D06)。
关键词
非平面地震波
位错点源
黏弹性边界
地震响应
谱元法
non-plane seismic waves
dislocation point source
viscoelastic boundary
seismic response
spectral element method
