Efficient hybrid simulation method for seismic response analysis of underground structures

被引：0
|
作者：
Yu H. [1 ]
Wang Z. [2 ]
机构：
[1] Key Laboratory of Geotechnical and Underground Engineering, Ministry of Education, Tongji University, Shanghai
[2] Department of Geotechnical Engineering, Tongji University, Shanghai
来源：
Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | 2024年 / 46卷 / 01期
关键词：
domain reduction method; hybrid method; non-free field seismic input; underground structure;
D O I：
10.11779/CJGE20221240
中图分类号：
学科分类号：
摘要：
The numerical simulation is critical for the seismic analysis of underground structures. However, its accuracy and efficiency are affected by the factors such as input of ground motion, boundary effect, model scale, which leads to the incompatibility among computational scale, time and accuracy. How to efficiently and accurately simulate the seismic response of the underground structure-ground interaction system is still an open question. A novel hybrid boundary element-finite element method in the framework of the domain reduction method (DRM) is proposed to efficiently simulate the seismic response characteristics of the subsurface structure-strata system. First, the overall subsurface structure-stratum model is divided into the inner domain sub-model of the near-field stratum structure and the outer domain sub-model of the far-field stratum, in which the displacement continuity at the inner-outer domain coupling boundary is ensured by overlapping nodes. Second, the non-free field vibration characteristics under the influences of free field and topography in the outer domain are solved by the boundary element method, and the dynamic response in the outer domain is converted into the equivalent seismic load by the DRM. The method greatly reduces the size of the outer domain, ensures the reasonable input of ground vibration, and realizes the rapid parametric analysis of the seismic response of subsurface structures in the inner domain. Further, two typical cases are designed to test the reliability and efficiency of the method. In the case of a two-line tunnel without the influences of topography, the accuracy of the method is validated by comparison with the reference solution. In another case of a two-line tunnel under the influences of terrain conditions, the numerical results show that compared with that of the remote boundary method and the traditional viscoelastic method, the computational cost is reduced by about 72% and 58%, respectively, and the computational scale is reduced by about 97% and 83%, respectively. In addition, the proposed method can be extended to the dynamic response analysis of subsurface structures under the action of oblique incident ground shaking. © 2024 Chinese Society of Civil Engineering. All rights reserved.
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页码：45 / 53
页数：8
相关论文
共 20 条
  • [11] KONTOE S, ZDRAVKOVIC L, POTTS D M., An assessment of the domain reduction method as an advanced boundary condition and some pitfalls in the use of conventional absorbing boundaries, International Journal for Numerical and Analytical Methods in Geomechanics, 33, 3, pp. 309-330, (2009)
  • [12] HU Dan, LI Fen, ZHANG Kaiyin, Wave input method for saturated soil-structure dynamic interaction analysis, Chinese Journal of Geotechnical Engineering, 40, pp. 58-62, (2018)
  • [13] LIU Zhongxian, LIU Ying, MENG Sibo, Et al., Near-fault ground motion simulation of alluvial valley based on indirect boundary element method, Rock and Soil Mechanics, 42, 4, pp. 1141-1155, (2021)
  • [14] ALIELAHI H, KAMALIAN M, ADAMPIRA M., Seismic ground amplification by unlined tunnels subjected to vertically propagating SV and P waves using BEM, Soil Dynamics and Earthquake Engineering, 71, pp. 63-79, (2015)
  • [15] ZHU Jun, LIANG Jianwen, Seismic analysis of subway station by a FE-IBE coupling method, Earthquake Engineering and Engineering Dynamics, 38, 4, pp. 111-116, (2018)
  • [16] VASILEV G, PARVANOVA S, DINEVA P, Et al., Soil-structure interaction using BEM-FEM coupling through ANSYS software package, Soil Dynamics and Earthquake Engineering, 70, pp. 104-117, (2015)
  • [17] SOARES D, GODINHO L., An overview of recent advances in the iterative analysis of coupled models for wave propagation, Journal of Applied Mathematics, 2014, pp. 1-21, (2014)
  • [18] LUCO J E, DE BARROS F C P., Dynamic displacements and stresses in the vicinity of a cylindrical cavity embedded in a half-space, Earthquake Engineering & Structural Dynamics, 23, 3, pp. 321-340, (1994)
  • [19] WONG H L., Diffraction of P, SV, and Rayleigh waves by surface topography, (1979)
  • [20] RICKER N., The form and laws of propagation of seismic wavelets, Geophysics, 18, 1, pp. 10-40, (1953)
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