Coseismic site response and slope instability using periodic boundary conditions in the material point method
Coseismic site response and slope instability using periodic boundary conditions in the material point method
复制标题
在质点法中使用周期性边界条件的同震场地响应和边坡失稳
DOI：
10.1016/j.jrmge.2022.09.016
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发表时间：
2023
影响因子：
7.3
通讯作者：
Yerro, Alba
中科院分区：
文献类型：
--
作者：
Alsardi, Abdelrahman;Yerro, Alba
提出了用于同震场地反应模拟的物质点法中的显式广义α时间格式和周期边界条件。所提出的边界条件使用直观的粒子重定位算法，确保物质点始终保持在计算网格内。MPM采用显式广义α时间格式，以实现对虚假高频振荡的抑制。首先，用有限元方法对MPM进行了验证。其次，研究了MPM对解析传递函数的捕捉能力。第三，采用对称路堤，研究了地震动强度(Ia)、几何尺寸和本构模型的影响。结果表明，模型尺寸越大，相同地震动下的峰值跳动和沉降量越大。当使用Mohr-Coulomb模型时，峰值跳动随Ia的增加而增大，但如果激活应变软化定律，则结果受地面运动的影响较小。最后，将MPM结果与Newmark滑动块解进行了比较。本文的简化分析强调了MPM在地震工程应用中捕捉整个变形过程的能力，几何特征的重要性，以及在模拟同震场地反应和随后的大变形时选择合适的本构模型。
This paper proposed the explicit generalized-α time scheme and periodic boundary conditions in the material point method (MPM) for the simulation of coseismic site response. The proposed boundary condition uses an intuitive particle-relocation algorithm ensuring material points always remain within the computational mesh. The explicit generalized-α time scheme was implemented in MPM to enable the damping of spurious high frequency oscillations. Firstly, the MPM was verified against finite element method (FEM). Secondly, ability of the MPM in capturing the analytical transfer function was investigated. Thirdly, a symmetric embankment was adopted to investigate the effects of ground motion arias intensity (I a), geometry dimensions, and constitutive models. The results show that the larger the model size, the higher the crest runout and settlement for the same ground motion. When using a Mohr-Coulomb model, the crest runout increases with increasing I a. However, if the strain-softening law is activated, the results are less influenced by the ground motion. Finally, the MPM results were compared with the Newmark sliding block solution. The simplified analysis herein highlights the capabilities of MPM to capture the full deformation process for earthquake engineering applications, the importance of geometry characterization, and the selection of appropriate constitutive models when simulating coseismic site response and subsequent large deformations.
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影响因子：
5.8
作者：
Alonso, Eduardo E.
通讯作者：
Alonso, Eduardo E.
DOI：
10.1061/(asce)gt.1943-5606.0002662
发表时间：
2021-12
影响因子：
3.9
作者：
Georgios Zalachoris;D. Zekkos;A. Athanasopoulos-Zekkos;N. Gerolymos
通讯作者：
Georgios Zalachoris;D. Zekkos;A. Athanasopoulos-Zekkos;N. Gerolymos
1994 年北岭地震期间巴尔博亚大道的液化和循环软化
DOI：
--
发表时间：
2021
期刊：
影响因子：
--
作者：
Renmin Pretell;K. Ziotopoulou;C. Davis
通讯作者：
C. Davis
DOI：
--
发表时间：
2013
期刊：
影响因子：
--
作者：
D. Karamitros;G. Bouckovalas;Y. Chaloulos
通讯作者：
Y. Chaloulos
影响因子：
0.3
作者：
Abdelrahman Alsardi;J. Copana;A. Yerro
通讯作者：
A. Yerro