Estudio del anclaje por adherencia y el comportamiento a flexión de refuerzos con laminados de fibras de carbono en elementos estructurales de hormigón armado
- Autores: Juan José Cruz Solis
- Directores de la Tesis: Lluís Gil Espert (dir. tes.)
- Lectura: En la Universitat Politècnica de Catalunya (UPC) ( España ) en 2015
- Idioma: español
- Tribunal Calificador de la Tesis: Francisco Alberto Alonso Farrera (presid.), Horia Alejandro Barbat Barbat (secret.), Marco Antonio Pérez Martínez (voc.)
- Materias:
- Enlaces
- Tesis en acceso abierto en: TDX
- Resumen
External reinforcement techniques with CFRP laminate adhered to concrete elements have advanced greatly over the past decade, obtaining a more effective method further lightweight and reliable. These advances have resulted from extensive research in the field of epoxy behavior, concrete fracture behavior, concrete-epoxy interface behavior and the ultimate strength of carbon fibers. Intervene in a reinforced concrete structure to increase the load-bearing strength, it is a process that must be developed with careful not to weaken any area of the existing structure in an attempt to strengthen, given this premise, reinforcement externally bonded CFRP laminates provide great advantages over traditional techniques reinforcements where it is necessary to modify existing geometry and also increase it. In this research the behavior of concrete and epoxy was analyzed together with the laminate in double shear tests that were conducted in the first stage. This allows to know the stress distribution along the bond length so as to determine the effective bond length, and the type of failure within the concrete and crack pattern commonly present in the most stressed area. In the second stage of the investigation, initially flat beams were tested, externally reinforced with CFRP laminates and later deep beams was tested. During this stage it was possible to capture the behavior of the strain along the laminate and the strain in the extreme compression fiber. The maximum bending moment is obtained for each configuration of external CFRP reinforcement With the data obtained it was possible to compare rates and maximum resistance to failure existing in the current literature and verify models proposed in the design standards of reinforced concrete structures with externally bonded laminates. Finally, modifications to the limit values of the states of strain of laminates for failures most commonly present in the beams externally reinforced with CFRP laminates are proposed, and recommendations are made for each stage of calculation of bending strength.
