首页|A hybrid contact approach for modeling soil-structure interaction using the material point method

A hybrid contact approach for modeling soil-structure interaction using the material point method

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The grid-based multi-velocity field technique has become increasingly popular for simulating the Ma-terial Point Method(MPM)in contact problems.However,this traditional technique has some short-comings,such as(1)early contact and contact penetration can occur when the contact conditions are unsuitable,and(2)the method is not available for contact problems involving rigid-nonrigid materials,which can cause numerical instability.This study presents a new hybrid contact approach for the MPM to address these limitations to simulate the soil and structure interactions.The approach combines the advantages of point-point and point-segment contacts to implement contact detection,satisfying the impenetrability condition and smoothing the corner contact problem.The proposed approach is first validated through a disk test on an inclined slope.Then,several typical cases,such as granular collapse,bearing capacity,and deformation of a flexible retaining wall,are simulated to demonstrate the robustness of the proposed approach compared with FEM or analytical solutions.Finally,the proposed method is used to simulate the impact of sand flow on a deformable structure.The results show that the proposed contact approach can well describe the phenomenon of soil-structure interaction problems.

Material point methodSoil-structure interactionNumerical simulationContact algorithm

Qinyang Sang、Yonglin Xiong、Rongyue Zheng、Xiaohua Bao、Guanlin Ye、Feng Zhang

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Key Laboratory of Impact and Safety Engineering,Ministry of Education,School of Mechanical Engineering and Mechanics,Ningbo University,Ningbo,315211,China

Institute of Geotechnical Engineering,Ningbo University,Ningbo,315211,China

College of Civil and Transportation Engineering,Shenzhen University,Shenzhen,518060,China

Department of Civil Engineering,Shanghai Jiao Tong University,Shanghai,200240,China

Department of Civil Engineering,Nagoya Institute of Technology,Showa-ku,Gokiso-cho,Nagoya,466-8555,Japan

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国家自然科学基金Key Laboratory of Impact and Safety Engineering(Ningbo University)

52022060

2024

10.1016/j.jrmge.2023.11.028

岩石力学与岩土工程学报(英文版)
中国科学院武汉岩土力学所中国岩石力学与工程学会武汉大学

岩石力学与岩土工程学报(英文版)

CSTPCD
影响因子：0.404
ISSN：1674-7755
年,卷(期)：2024.16(5)
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