Literatura científica selecionada sobre o tema "Géo-Mécanique"
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Artigos de revistas sobre o assunto "Géo-Mécanique"
Frossard, Etienne. "La mécanique dissipative des géo-matériaux granulaires et ses applications pratiques en Génie Civil". Revue Française de Géotechnique, n.º 167 (2021): 2. http://dx.doi.org/10.1051/geotech/2021007.
Texto completo da fonteTeses / dissertações sobre o assunto "Géo-Mécanique"
Maghoul, Pooneh. "Solutions fondamentales en Géo-Poro-Mécanique multiphasique pour l'analyse des effets de site sismiques". Phd thesis, Université Paris-Est, 2010. http://tel.archives-ouvertes.fr/tel-00599397.
Texto completo da fonteHeymann, Adeline. "Approche expérimentale du comportement mécanique des géo-ouvrages à technologie cellulaire. Application aux ouvrages pare-blocs". Phd thesis, Université de Grenoble, 2012. http://tel.archives-ouvertes.fr/tel-00721823.
Texto completo da fonteDarwich, Ghina. "Modélisation du comportement géo-mécanique d’une conduite de transfert et évaluation de sa performance en contexte incertain". Thesis, Bordeaux, 2019. http://www.theses.fr/2019BORD0096.
Texto completo da fonteThe main objective of this thesis is to better understand the mechanisms that control the geo-mechanical behavior of a feeder in order to evaluate its performance in uncertain context. It is focused on four main points:The first point is related to the soil-pipe interaction: In the case of buried pipelines, the soil has a decisive influence on the distribution of forces, displacements and consequently stresses and deformations of the pipe. The simplified Winkler model was chosen to represent the soil-pipe interaction in our study. This model, which is appropriate for geotechnical structures, has the advantage of requiring only one parameter (the coefficient of subgrade reaction) to characterize the response of the soil and the structure under loading.The second point concerns numerical modeling: A 1D modeling in the longitudinal direction, which considers the pipe as a beam on elastic springs, is not enough to translate the "real" behavior of this pipe. 2D plane modeling, which considers the pipe only by its cross section, is also insufficient to represent "reality". 3D modeling remains very expensive vis-à-vis the calculation time in a probabilistic context. In our study, buried reinforced concrete pipes (with steel core) carrying drinking water under high pressure, are considered. To account for the effects of internal pressure and complex surface loading, and those of the soil (in both longitudinal and transverse directions), we use a "2.5D modeling". It consists in combining the geo-mechanical response in the cross section, obtained from a 2D model, and that of a simple 1D model, so as to obtain the profile of the settlements and that of the stresses in the section all along the pipe.The third point concerns the various uncertainties and the spatial variability of the soil: The geo-mechanical behavior of the buried pipelines is tainted with random uncertainties - related to the intrinsic variability of the materials properties and their heterogeneity - and epistemic uncertainties - resulting from a partial or total ignorance of the studied mechanism. Longitudinal soil variability is considered through VanMarcke's Random Field Theory.Finally, the fourth point is devoted to the application of the developed approach in the context of asset management of a water network by defining and quantifying criticality indicators allowing, through reliability analysis methods, evaluating the performance of the pipe vis-à-vis previously defined limit states related to inspection, maintenance or renewal
Berthelon, Josselin. "Etude mécanique des déformations des chaînes plissées d'avant-pays et rôle des argiles roches-mères durant leur maturation". Thesis, Paris 6, 2015. http://www.theses.fr/2015PA066687/document.
Texto completo da fonteIn this thesis, changes in the mechanical properties of organic-rich shales, when they mature, are studied in order to deduce if burial may mechanically activate tectonic imbrication and control the folding style. This multidisciplinary work is organized according to three axes: a field study, a laboratory study and a thermo-mechanical modeling study. In the first part, the study balanced geological cross-sections through the Mediterranean fold-and-thrust belts shows the importance of the mechanical interpretation for structural restorations and to validate structural evolution scenarios. The Albanian Posidonia Schist laboratory characterization allows discussing the vertical evolution of mineralogical, geochemical and mechanical parameters in a source-rock formation that control the rheological behavior of source rocks. Both geological cases serve as input data for modeling designed to simulate the evolution of a source rock during its burial. Two aspects are examined: Using TEMISFlow Arctem basin models, I analyze the conditions necessary to create overpressure in a source-rock detachment located in the footwall of a thrust. Through geo-mechanical modeling, I study the mechanical conditions necessary to develop ideal fold geometries within a mechanical stratigraphy. A hierarchy of parameters to activate a detachment within source rocks embedded in a mechanical stratigraphy is thus proposed. Through an analysis of the coupling between these two aspects, geo-mechanical and hydro-mechanical, this thesis is a contribution to the search of a rheological law that takes into account the thermo-dependent softening of shale and source rocks in geo-mechanical modeling
Berthelon, Josselin. "Etude mécanique des déformations des chaînes plissées d'avant-pays et rôle des argiles roches-mères durant leur maturation". Electronic Thesis or Diss., Paris 6, 2015. https://accesdistant.sorbonne-universite.fr/login?url=https://theses-intra.sorbonne-universite.fr/2015PA066687.pdf.
Texto completo da fonteIn this thesis, changes in the mechanical properties of organic-rich shales, when they mature, are studied in order to deduce if burial may mechanically activate tectonic imbrication and control the folding style. This multidisciplinary work is organized according to three axes: a field study, a laboratory study and a thermo-mechanical modeling study. In the first part, the study balanced geological cross-sections through the Mediterranean fold-and-thrust belts shows the importance of the mechanical interpretation for structural restorations and to validate structural evolution scenarios. The Albanian Posidonia Schist laboratory characterization allows discussing the vertical evolution of mineralogical, geochemical and mechanical parameters in a source-rock formation that control the rheological behavior of source rocks. Both geological cases serve as input data for modeling designed to simulate the evolution of a source rock during its burial. Two aspects are examined: Using TEMISFlow Arctem basin models, I analyze the conditions necessary to create overpressure in a source-rock detachment located in the footwall of a thrust. Through geo-mechanical modeling, I study the mechanical conditions necessary to develop ideal fold geometries within a mechanical stratigraphy. A hierarchy of parameters to activate a detachment within source rocks embedded in a mechanical stratigraphy is thus proposed. Through an analysis of the coupling between these two aspects, geo-mechanical and hydro-mechanical, this thesis is a contribution to the search of a rheological law that takes into account the thermo-dependent softening of shale and source rocks in geo-mechanical modeling
Adwan, Anthony. "Analyse mécanique stochastique des structures géologiques compressives tridimensionnelles au-dessus d'un socle rigide". Electronic Thesis or Diss., CY Cergy Paris Université, 2023. http://www.theses.fr/2023CYUN1236.
Texto completo da fonteFor secure underground exploitation and subsurface site characterization, ensuring the accuracy of structural interpretations and stress field estimations, as well as assessing damage states, are crucial factors in effective risk mitigation. However, understanding the stress states is often regarded as a challenging and time-consuming task due to limited data and oversimplified assumptions. The high cost and delicate nature of stress measurements further complicate matters. Thus, the integration of geomechanical models is deemed essential for more efficient site evaluations. Yet, even with numerical analysis, the possibility of biased data and observations cannot be entirely eliminated. These errors, stemming from measurement errors, geometric complexities, spatial and temporal variations, and unverified geological concepts, require strategic decisions based on rigorous mathematical and probabilistic assessments.In this thesis, we employ numerical implementations of the limit analysis theory to estimate stress fields and the potential for plastic deformation in a series of 2D and 3D idealized prototypes. Our research begins by developing automated methods for fault detection using static stress and virtual deformation fields derived from the numerical analysis. We focus on identifying values indicative of rupture to isolate the failure zones. We then extract fault lines (in 2D) and surfaces (in 3D) using image processing techniques or a combined approach involving automated clustering of nodes that reach failure and polynomial fitting.To gain more insights into the 3D results observed, we participated in a collaborative study to explore the Coulomb Critical Wedge (CCW) theory within a 3D environment. A basic wedge, with heterogeneous surface slopes and varying lateral width, above a homogeneous basement was analyzed for different basal friction angles. The simulations revealed three primary rupture mechanisms, transitioning from a fully unstable to a fully stable wedge, with some cases presenting both wedges, separated by an "S"-shaped transfer zone.Furthermore, we investigated stress distributions in models featuring a generic fault developed over a basal detachment. We conducted a total of 2500 2D and 500 3D simulations, exploring parametric variations in basal and fault friction angles. These simulations were then classified into clusters representing similar predicted failure patterns. Comparison between 2D and 3D results showed that the 3D lateral effect influences the obtained failure pattern, distinguishing it from its 2D counterpart. In addition, a statistical, cluster-based stress analysis proved the uniqueness of stress patterns for specific rupture behavior, despite varying magnitudes.Finally, we culminated this thesis by conducting a stochastic analysis of a generic prototype inspired by the NE Jura setting. We implemented a basal step with various height configurations, varied the bulk, fault, and basement properties, while also considering two main cases of existing and non-existing inherited faults. The 2000 3D simulations were divided into 22 clusters. The results demonstrated the significant influence of the basal friction angles followed by the bulk resistance in defining rupture patterns and showed the existence of a region presenting no failure in 95% of the cases. The workflow developed in this thesis proved valuable in both geological and mechanical aspects. It also showed that despite minimum calibrations, initializing and interpreting hundreds of 3D calculations offer a cost-efficient site investigation alternative
Marinelli, Ferdinando. "Comportement couplé des géo-matériaux : deux approches de modélisation numérique". Phd thesis, Université de Grenoble, 2013. http://tel.archives-ouvertes.fr/tel-00954405.
Texto completo da fonteLopez-Caballero, Fernando. "Influence du comportement non linéaire du sol sur les mouvements sismiques induits dans des géo-structures". Châtenay-Malabry, Ecole centrale de Paris, 2003. http://www.theses.fr/2003ECAP0926.
Texto completo da fonteArsenie, Ioana maria. "Etude et modélisation des renforcements de chaussées à l'aide de grilles en fibre de verre sous sollicitations de fatigue". Thesis, Strasbourg, 2013. http://www.theses.fr/2013STRAD025/document.
Texto completo da fonteThe objective of the PhD thesis « Study and modelling of the pavement reinforcement with glass fibre grid under fatigue loading » is to characterize the reinforcement role of the asphalt surface layer of a pavement subjected to fatigue loading with the glass fibre grid or « geo-grid ». The fatigue behaviour of the composite formed of asphalt mixture and geo-grid is studied in laboratory with four point bending tests (4PB) performed with sinusoidal waveform, at 10°C and 25 Hz. The tested specimens are 630 x 100 x 100 mm3 beams of two types: asphalt beams (non-reinforced) and asphalt beams reinforced with geo-grid (reinforced). A four point bending prototype device was designed to perform the fatigue tests on the big size asphalt specimens. The device respects the European Standards. The experimental results were used for modelling of the damage evolution under fatigue loading of the both types of beams. The damage laws of the materials are Bodin laws programmed in Cast3M finite element code. Two categories of models were conceived, respectively: one layer beam models and tri-layers beam models. Each category has a model of non-reinforced beam and a model of reinforced beam. Furthermore, Castro-Sanchez model was used to predict damage evolution and in particular the number of cycles to failure correspondent to the two types of beams