{"title":"Constitutive model for soil-structure interface considering particle rearrangement","authors":"Yifei Sun, Xingbo Huang","doi":"10.1007/s10035-025-01546-3","DOIUrl":null,"url":null,"abstract":"<div><p>The strength-displacement behaviour of soil-structure interface should be carefully considered during slope stabilisation using soil nail. Experimental evidences have demonstrated that tangential displacement between the soil and structure could deteriorate the microstructure within the interface, resulting in a strength degradation of the soil-structure system. To capture such responses, an elastoplastic model is developed by adopting particle probabilistic entropy to characterise the evolution of particle rearrangement within the interface, where a microstructure-dependent plastic flow rule and a kinematic hardening law are proposed. The capability of the model is verified by simulating a series of interface direct shear tests, where the normal-dilatancy response and strain softening of the interface under low normal stress as well as the distinct normal-contraction under cyclic loads are well simulated. Then, the model is further implemented through FRIC subroutines for finite element (FE) simulation of the pull-out tests on a soil–nail under different overburden pressures. It is found that the FE model can reasonably simulate the pull-out behaviour of a soil nail. The stress and strain fields around the soil nail as well as the pull-out force and displacement response can be reproduced.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><img></picture></div></div></figure></div></div>","PeriodicalId":49323,"journal":{"name":"Granular Matter","volume":"27 3","pages":""},"PeriodicalIF":2.9000,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Granular Matter","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1007/s10035-025-01546-3","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
The strength-displacement behaviour of soil-structure interface should be carefully considered during slope stabilisation using soil nail. Experimental evidences have demonstrated that tangential displacement between the soil and structure could deteriorate the microstructure within the interface, resulting in a strength degradation of the soil-structure system. To capture such responses, an elastoplastic model is developed by adopting particle probabilistic entropy to characterise the evolution of particle rearrangement within the interface, where a microstructure-dependent plastic flow rule and a kinematic hardening law are proposed. The capability of the model is verified by simulating a series of interface direct shear tests, where the normal-dilatancy response and strain softening of the interface under low normal stress as well as the distinct normal-contraction under cyclic loads are well simulated. Then, the model is further implemented through FRIC subroutines for finite element (FE) simulation of the pull-out tests on a soil–nail under different overburden pressures. It is found that the FE model can reasonably simulate the pull-out behaviour of a soil nail. The stress and strain fields around the soil nail as well as the pull-out force and displacement response can be reproduced.
期刊介绍：
Although many phenomena observed in granular materials are still not yet fully understood, important contributions have been made to further our understanding using modern tools from statistical mechanics, micro-mechanics, and computational science.
These modern tools apply to disordered systems, phase transitions, instabilities or intermittent behavior and the performance of discrete particle simulations.
>> Until now, however, many of these results were only to be found scattered throughout the literature. Physicists are often unaware of the theories and results published by engineers or other fields - and vice versa.
The journal Granular Matter thus serves as an interdisciplinary platform of communication among researchers of various disciplines who are involved in the basic research on granular media. It helps to establish a common language and gather articles under one single roof that up to now have been spread over many journals in a variety of fields. Notwithstanding, highly applied or technical work is beyond the scope of this journal.
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