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Rozprawy doktorskie na temat "Barres d'armature – Matériaux"
Ould, Sidi Mohamed Billy. "Caractéristiques physiques et mécaniques de nouvelles barres d'armature en matériaux composites". Mémoire, Université de Sherbrooke, 2002. http://savoirs.usherbrooke.ca/handle/11143/1210.
Pełny tekst źródłaZemour, Nabila. "Contribution à l'étude de l'adhérence et du chevauchement de barres d'armature en matériaux composites de PRFV avec le béton Auto-Plaçant et le béton conventionnel". Mémoire, Université de Sherbrooke, 2012. http://hdl.handle.net/11143/5527.
Pełny tekst źródłaDekoster, Mickaël. "Étude du comportement mécanique des structures en béton armé dégradé par la corrosion". Lille 1, 2003. https://ori-nuxeo.univ-lille1.fr/nuxeo/site/esupversions/475c3e2b-1352-42dd-897d-525f2374f998.
Pełny tekst źródłaProvencher, Philippe. "Renforcement des dalles épaisses en cisaillement". Thesis, Université Laval, 2011. http://www.theses.ulaval.ca/2011/27915/27915.pdf.
Pełny tekst źródłaAgossou, Yémalin. "Étude de la mise en oeuvre du rotin et du rônier comme armature des nervures et armatures de paillasse de la table de compression en béton de latérite". Electronic Thesis or Diss., Université de Lorraine, 2021. https://docnum.univ-lorraine.fr/public/DDOC_T_2021_0350_AGOSSOU.pdf.
Pełny tekst źródłaEveryone agrees today on the impact of the production of industrial materials on the planet's climate. The construction sector is one of the main culprits in this situation as it is the largest consumer of energy and the second emitter of CO2 in the world. The depletion of certain material deposits is also one of the problems facing mankind. It is therefore important to achieve eco-friendly buildings that consume little energy and emit fewer greenhouse gases over their entire life cycle. This study is part of a general issue of developing innovative building materials with low environmental impact. We are therefore proposing a new concrete based on laterite aggregate with the substitution of steel reinforcements by those made of palmwood (Borassus Aethiopum) and rattan (Calamus Dearatus) for the realization of parts of concrete structures, more specifically the floors This study was carried out on the laterite from the ATOTINGO quarry in the town of ALLADA in Benin where we carried out its physical and mechanical characterization of the laterite and proposed a method for formulating structural concrete based on this laterite. We have therefore characterized the different materials of plant origin (palm tree and rattan) to control their mechanical performance. The formulation of the laterite concrete allowed us to develop three types of lateral concrete. The use of raw (unwashed) laterite has led to a concrete with a 28-day compressive strength of 21.23 ± 1.24 MPa. However, washing by removing fine particles smaller than 63µm has increased this strength to 27.52 ± 0.32 MPa with modulus of elasticity of 17920 ± 324MPaThe proposed plant reinforcements have developed respectively a tensile tensile stress parallel to the fibers of the palmwood and rattan lianas of 156MPa and 22MPa. The adhesion of the laterite concrete and the palmyra reinforcement measured in various ways showed that this adhesion could reach 4MPa. These performances validated our approach to developing a floor in eco-friendly materials. It appears that the floor thus developed to have spans of up to 3.50. The dimensioning of the beam of the latter according to the standard in force reveals that a section of reinforcement of 25mm diameter could effectively be a solution to the realization of a floor
Rolland, Arnaud. "Comportement mécanique et durabilité de structures en béton renforcées par des armatures composites internes". Thesis, Paris Est, 2015. http://www.theses.fr/2015PEST1065/document.
Pełny tekst źródłaCorrosion of the steel reinforcing bars (rebars) is the main process involved in the degradation of reinforced concrete (RC) structures, and has large repercussions on the maintenance/reparation expenses. To prevent such degradations on new infrastructures, the use of corrosion-free reinforcements, such as Fiber Reinforced Polymer (FRP) bars based on glass, carbon or aramid fibers, is gaining interest. Specific guidelines are already available in several countries (USA, Canada or Japan for instance), that define the design principles and good practices for this type of internal rebars; beside, many FRP RC structures have been built and are in service in these countries. Although the development of these new reinforcing bars is quite promising, infrastructures owners are still reluctant for their wide-scale use, especially in France. There are still major concerns regarding the long term behavior of FRP RC structures, and more particularly, the durability of glass fibers reinforced polymers (GFRP) when subjected to an alkaline environment, and the ageing behavior of the GFRP/concrete bonding as well. In this context, the present study aims at developing for the first time in France, a set of methodologies that allows : to characterize the main physical/mechanical properties of different types of FRP bars from the marketto assess the durability of GFRP bars (the most common type of bar) and their interface with concrete through relevant accelerated ageing procedures. The first part of this study was thus devoted to the physical/mechanical characterization of a selection of commercially available FRP rebars, based on glass, carbon or aramid fibers, and to the mechanical behavior of corresponding FRP/concrete interfaces. Beside the microstructural characterization of the various FRP materials by microscopy and thermal analysis techniques, tensile and short beam tests were developed in order to determine the tensile properties (Young's modulus and strength) and the interlaminar shear strength (ILSS) of the bars. Specific pull-out tests then made it possible to evaluate the influence of several parameters (type of fibers, diameter and surface geometry of the bars) on the mechanism of load transfer at the bar/concrete interface. A main originality of the proposed approach relied on the instrumentation of several test bodies by optical fiber strain sensors, which were installed along the bar/concrete interface. Such a distributed measurement system provided local information in the form of tensile strain profiles of the bars along the interface, and made it possible to determine the effective transfer length of the various types of FRP bars. As a complement to the previous experimental study, an analytical and numerical modeling work was initiated to simulate the pull-out tests and investigate more closely the interfacial mechanisms involved in the FRP bar/concrete bond behavior. In this line, an improved interface model was first proposed, which was then implemented in a finite element model (cohesive zone model formulated in the context of damage mechanics).Finally, an accelerated ageing protocol was developed and applied to the GFRP bars, either alone or embedded in a concrete medium. The retention properties of both bars and interfaces were determined after various periods of exposure (up to 240 days). Except a drop of tensile properties observed for GFRP bars that were directly immersed in an alkaline solution, which is considered as a very severe environment compared to actual service conditions, no significant loss of interfacial properties was detected on aged specimens compared to the initial state
Książki na temat "Barres d'armature – Matériaux"
1941-, Clarke John L., red. Alternative materials for the reinforcement and prestressing of concrete. London: Blackie Academic, 1993.
Znajdź pełny tekst źródłaClarke, J. L. Alternative Materials for the Reinforcement and Prestressing of Concrete. Taylor & Francis Group, 1993.
Znajdź pełny tekst źródłaClarke, J. L. Alternative Materials for the Reinforcement and Prestressing of Concrete. Taylor & Francis Group, 2003.
Znajdź pełny tekst źródłaClarke, J. L. Alternative Materials for the Reinforcement and Prestressing of Concrete. Taylor & Francis Group, 1993.
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