Undrained Loading
Mostrando 1-7 de 7 artigos, teses e dissertações.
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1. Numerical investigation of diffuse instability in sandy soil using discrete element method under proportional strain path loading
Abstract The Loose sandy soil can manifest static liquefaction phenomenon under undrained condition, in which the onset of instability is within the failure line, and there is no obvious shear band. This type of failure mode, very different from localized instability that occurs in dense sand, is called the diffuse instability. In this paper, a series of pro
Lat. Am. j. solids struct.. Publicado em: 29/11/2018
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2. Modification of a Constitutive Model in the Framework of a Multilaminate Method for Post-Liquefaction Sand
Abstract The estimation of the value and direction of post-liquefaction deformations is one of the most challenging issues in the modelling of liquefaction soil, due to the inherent and induced anisotropy. It is very important in the science of soil-constitutive models to present a simple and comprehensive model for the prediction of fabric anisotropy effect
Lat. Am. j. solids struct.. Publicado em: 2017-08
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3. Development of a hypoplastic model that represents overconsolidation effects. / Desenvolvimento de um modelo hipoplástico que represente efeitos do sobreadensamento.
Modifications in a hypoplastic model are proposed intending to represent the mechanical behavior of overconsolidated clays. The overconsolidation ratio, the cohesion intercept and indices that represent overconsolidation characteristics are introduced in the model, resulting in parameters with a clear physical meaning and of easy to determine. The constituti
Publicado em: 2006
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4. STUDY OF CONSTITUTIVE MODELS TO PREDICT SOIL LIQUEFACTION UNDER MONOTONIC LOADING / ESTUDO DE MODELOS CONSTITUTIVOS PARA PREVISÃO DA LIQUEFAÇÃO EM SOLOS SOB CARREGAMENTO MONOTÔNICO
Historicamente é sabido que muitas das rupturas ocorridas em barragens ou taludes naturais podem ser atribuídas ao fenômeno da liquefação de solos arenosos, causada pela ação de carregamentos dinâmicos gerados por explosão ou, mais freqüentemente, por terremotos. Quando liquefação ocorre, um súbito aumento da poropressão faz decrescer a resist�
Publicado em: 2004
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5. EFEITO DA TEMPERATURA EM SOLOS / TEMPERATURE EFFECTS ON SOILS
The subject matter of this thesis is the study of the mechanical behavior of clay and residual soils subjected to a series of tests with temperatures ranging from 20 to 70ºC. The experimental program consisted of Atterberg limits, consolidation tests with incremental loading (SIC), triaxial consolidated undrained tests (CIU) and direct shear tests on both s
Publicado em: 1998
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6. NON LINEAR ANALYSIS OF EXCAVATIONS AND EMBANKMENTS / ANÁLISE NÃO LINEAR DE ESCAVAÇÕES E ATERROS
The main objective of this thesis consists on the development and application of a computational program, ANLOG (Non Linear Analysis of Geotechnical Constructions), to analyse geotechnical problems coupling flow and deformation, and considering constitutive non-linear relations for the soil modelling.At the global level, the solution of the non linear system
Publicado em: 1998
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7. CUBICAL TRIAXIAL TESTS IN SATURATED SAND / ENSAIOS TRIAXIAIS CÚBICOS EM AREIAS SATURADAS
The subject of this dissertation is a detailed experimental study of the stress-strain-strength behavior of saturated sand under three-dimensional loading condition.The investigation was carried out in a cubic triaxial and a conventional apparatuses. The cubic triaxial apparatus has the advantage of independently controlling the magnitude of the three princi
Publicado em: 1997