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Descripción
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| This thesis presents, a numerical analysis of the reinforcement and reparation of steel slender silos having concentric hopper with carbon fiber-reinforced polymer (CFRP). The numerical model has been developed using the finite element method. The actions of the stored material over the silo wall were obtained by simultaneously modeling the silo, and the stored material. The interaction between both materials was properly simulated. The Drucker Prager elastoplastic criterion was used to define the behavior of the stored material. The simulations analyzed the influence of different reinforcement layers and their placement. In all cases, the effectiveness of the CFRP used for reinforcing and repairing steel slender silos was obtained. Indeed, a significant reduction of the circumferential and meridional stresses, especially for the bin ? hopper junction was also obtained. Taking into account the cost of the CFRP, a parametric analysis is then conducted to define the reinforced zone and the number of CFRP layers required to produce an optimized reinforcement. The results shows that the reduction rate obtained of stresses in the silo are about 30% compared to a silo with non-reinforced or repaired wall. Subsequently, an application of this approach was tested for the repair of damaged silos. Indeed, it seemed that, the reinforcement and the reparation with CFRP can be of interest for silos having suffered damage and alterations that induced a reduction in the thickness of their walls. | |
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Internacional
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ISBN
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Tipo de Tesis
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Doctoral |
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Calificación
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Apto |
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Fecha
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19/12/2016 |