{"title":"DEM investigation of the interaction between dry granular flow and pier with coupled particle size and Froude characteristics","authors":"Zhuhong Wang, Hang Zhou","doi":"10.1007/s10035-025-01564-1","DOIUrl":null,"url":null,"abstract":"<div><p>The mechanisms of granular flow-structure interactions and impact dynamics serve as a foundation for bridge engineering design. However, the design of bridge piers to counter granular flow continues to be influenced by the particle size distribution and the Froude characteristics’ impact on pier performance. A three-dimensional numerical model is established in this study, using the Discrete Element Method (DEM), and its reliability is confirmed through flume tests. The interaction mechanisms and dynamic impact characteristics of granular flow, coupling with particle size and Froude number (<i>F</i>r), and pier’s shapes, were explored. The flow characteristics of granular flow have been revealed, as well as the interplay mechanism between granular flow and pier, the energy evolution mechanism, and escalation. The impact force distribution of granular flow on pier was clarified. A comparative analysis was conducted on the peak impact force resistance coefficient (<i>C</i><sub>d</sub>) for pier of assorted cross-sectional shapes. We have further developed a unified particle size-bridge pier-special design diagram, quantifying the influence of particle size and <i>F</i>r on the hydrodynamic <i>α</i>. The analysis indicates that the existing models calibrated by limited experiments may overestimate the peak impact force on round and round-end bridge piers, while underestimating it for square bridge piers. </p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":49323,"journal":{"name":"Granular Matter","volume":"27 4","pages":""},"PeriodicalIF":2.9000,"publicationDate":"2025-08-21","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/s10035-025-01564-1","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 mechanisms of granular flow-structure interactions and impact dynamics serve as a foundation for bridge engineering design. However, the design of bridge piers to counter granular flow continues to be influenced by the particle size distribution and the Froude characteristics’ impact on pier performance. A three-dimensional numerical model is established in this study, using the Discrete Element Method (DEM), and its reliability is confirmed through flume tests. The interaction mechanisms and dynamic impact characteristics of granular flow, coupling with particle size and Froude number (Fr), and pier’s shapes, were explored. The flow characteristics of granular flow have been revealed, as well as the interplay mechanism between granular flow and pier, the energy evolution mechanism, and escalation. The impact force distribution of granular flow on pier was clarified. A comparative analysis was conducted on the peak impact force resistance coefficient (Cd) for pier of assorted cross-sectional shapes. We have further developed a unified particle size-bridge pier-special design diagram, quantifying the influence of particle size and Fr on the hydrodynamic α. The analysis indicates that the existing models calibrated by limited experiments may overestimate the peak impact force on round and round-end bridge piers, while underestimating it for square bridge piers.
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.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
