Numerical Methods in Geotechnical Engineering IX最新文献_第8页

Non-Euclidian discrete geometric modeling of granular soils 颗粒土的非欧几里得离散几何模型

Numerical Methods in Geotechnical Engineering IX Pub Date : 2018-06-19 DOI: 10.1201/9780429446931-44

Y. Larom

引用次数: 0

2D and 3D rock slope stability analysis in an open-pit mine 某露天矿岩体边坡二维和三维稳定性分析

Numerical Methods in Geotechnical Engineering IX Pub Date : 2018-06-19 DOI: 10.1201/9780429446924-20

J. Soto, C. Romanel

引用次数: 0

Behaviour of laterally loaded pile 横向荷载桩的受力特性

Numerical Methods in Geotechnical Engineering IX Pub Date : 2018-06-19 DOI: 10.1201/9780429446924-76

A. Ahayan, B. Cerfontaine, F. Collin, P. Kotronis

引用次数: 4

Boundary stress distribution in silos filled with granular material 填充颗粒物料筒仓的边界应力分布

Numerical Methods in Geotechnical Engineering IX Pub Date : 2018-06-19 DOI: 10.1201/9780429446931-109

P. To, N. Sivakugan

{"title":"Boundary stress distribution in silos filled with granular material","authors":"P. To, N. Sivakugan","doi":"10.1201/9780429446931-109","DOIUrl":"https://doi.org/10.1201/9780429446931-109","url":null,"abstract":"Silo, a very popular structure in powder and mining industry, is a vertical container with an open outlet at the bottom and an optional inlet at the top. The design of silo requires a deep understanding of stress distribution at boundaries in both static and dynamic condition. Prior numerical studies use Finite Element Method or Finite Difference Method which shows an increase of vertical stress before it is leveled out by friction at a shallow depth. This is understandable for continuous media because the settlement caused by vertical stress must stop at some level. Nevertheless, experimental studies show that the vertical stress of the granular and porous media still increases with a constant rate even at a much greater depth. Although the Discrete Element Method (DEM) can simulate granular materials, it has some difficulties in determination of stress distribution because it is based on contact force, not the stress. This paper employs DEM with sphero-polyhedra shapes to simulate the behaviour of granular materials in silos. The stress distribution is calculated as average values. This requires a significant number of particles. Therefore, the paper focuses on narrowly graded materials. Some correlation with experimental data has been found.","PeriodicalId":107346,"journal":{"name":"Numerical Methods in Geotechnical Engineering IX","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131067720","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Consideration of numerical methods in next generation Eurocode 7 (EN 1997)—current state of the amendment 对下一代欧洲法规7 (EN 1997)中数值方法的考虑-修订的现状

Numerical Methods in Geotechnical Engineering IX Pub Date : 2018-06-19 DOI: 10.1201/9780429446924-3

A. Lees, H. Walter

引用次数: 0

Numerical analysis of an unsymmetrical railcar unloading pit and connection trench 非对称轨道车辆卸载坑及连接沟的数值分析

Numerical Methods in Geotechnical Engineering IX Pub Date : 2018-06-19 DOI: 10.1201/9781351003629-146

G. Pisco, C. Fartaria, R. Tomásio, J. Costa, J. Azevedo

{"title":"Numerical analysis of an unsymmetrical railcar unloading pit and connection trench","authors":"G. Pisco, C. Fartaria, R. Tomásio, J. Costa, J. Azevedo","doi":"10.1201/9781351003629-146","DOIUrl":"https://doi.org/10.1201/9781351003629-146","url":null,"abstract":"A numerical analysis was performed simulating the deep excavation and dewatering effects on retaining walls of an unsymmetrical railcar unloading pit and trench. The pit has a depth of 22 meters and an internal diameter of 45 meters. The trench is non-collinear with the pit center and it has 12 m width by 122 m length. A 3D Finite Element Model using PLAXIS software was conducted in order to better estimate both general and local effects in the design of the pit’s structural elements, mainly due to the singularities introduced by the trench opening on the west side of the pit wall, as well as the trench excavation. Both geotechnical and hydrogeological characteristics of the site were taken into consideration, as well as the main construction stages, covering the excavation sequence and the groundwater inflow analysis. RÉSUMÉ: Dans cet article ont présent une analyse numérique qui a été développe pour simuler une excavation profonde et l’effet du rebattement de la nappe phréatique dans les murs de soutènement d'un puit non symétrique pour l’extraction et le stockage des minéraux avec l’aide des wagons. Avec une profondeur de 22m et un diamètre intérieur de 45m, le puit circulaire a une intersection de 12m avec une zone en couloir rectangulaire d’accès au puit, placée de façon non aligné avec le centre du puit. Un modelé 3D a été développe avec l’aide du software PLAXIS tenant l’objective d’estimer numériquement les effets locaux e globaux dans le dimensionnent des éléments structurels du puit, en particulier les effets de l ́excavation dans la zone d’ouverture correspondent à l’intersection avec le couloir d’accès. Les caractéristiques géotechniques e hydrogéologiques ont été considérés dans le modèle numérique, bien aussi comme les phases des excavations plus importants et l ́analyse de l ́entrée de l’eau à l’intérieur du puit.","PeriodicalId":107346,"journal":{"name":"Numerical Methods in Geotechnical Engineering IX","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130110043","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Efficient finite-element analysis of the influence of structural modifications on traffic-induced building vibrations 结构变化对交通诱发建筑振动影响的有效有限元分析

Numerical Methods in Geotechnical Engineering IX Pub Date : 2018-06-19 DOI: 10.1201/9781351003629-196

P. Persson, L. Andersen

引用次数: 1

Enhanced plasticity modelling of high-cyclic ratcheting and pore pressure accumulation in sands 砂土中高周旋棘轮和孔隙压力积累的增强塑性模型

Numerical Methods in Geotechnical Engineering IX Pub Date : 2018-06-19 DOI: 10.1201/9780429446931-11

H. Liu, F. Zygounas, A. Diambra, F. Pisanò

{"title":"Enhanced plasticity modelling of high-cyclic ratcheting and pore pressure accumulation in sands","authors":"H. Liu, F. Zygounas, A. Diambra, F. Pisanò","doi":"10.1201/9780429446931-11","DOIUrl":"https://doi.org/10.1201/9780429446931-11","url":null,"abstract":"Predicting accurately the response of sands to cyclic loads is as relevant as still challenging when many loading cycles are involved, for instance, in relation to offshore or railway geo-engineering applications. Despite the remarkable achievements in the field of soil constitutive modelling, most existing models do not yet capture satisfactorily strain accumulation under high-cyclic drained loading, nor the the build-up of pore pressures under high-cyclic undrained conditions. Recently, bounding surface plasticity enhanced with the concept of memory surface has proven promising to improve sand ratcheting simulations under drained loading conditions (Corti et al. 2016). This paper presents a new model built by combining the memory surface conceptby Corti et al. (2016) with the well-known SANISAND04 bounding surface formulation proposed by Dafalias and Manzari (2004). The outcome is a new sand model that can reproduce phenomenologically the fabric evolution mechanisms governing strain accumulation under long-lasting loading histories (here up to 104 loading cycles). In undrained test simulations, the model proves capable of correctly capturing the rate of pore pressure accumulation, preventing precocious occurrence of cyclic liquefaction.","PeriodicalId":107346,"journal":{"name":"Numerical Methods in Geotechnical Engineering IX","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115023724","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 15

The role of evolutionary algorithms in soil constitutive models 进化算法在土壤本构模型中的作用

Numerical Methods in Geotechnical Engineering IX Pub Date : 2018-06-19 DOI: 10.1201/9780429446931-20

C. Pereira, J. Maranha

引用次数: 0

A relook into numerical simulations of the pressuremeter test for the calibration of advanced soil models 用于高级土壤模型标定的压力计试验数值模拟研究述评

Numerical Methods in Geotechnical Engineering IX Pub Date : 2018-06-19 DOI: 10.1201/9781351003629-57

Q. Ong, S. Tan

引用次数: 0