Cohesive‐frictional model for bond and splitting action of prestressing wire |
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| Authors: | J C Gálvez J M Benítez M J Casati B S Tork D A Cendón |
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| Institution: | 1. Departamento de Ingeniería Civil: Construcción, E.T.S. de Ingenieros de Caminos, Canales y Puertos Universidad Politécnica de Madrid, 28040 Madrid, Spain;2. Departamento de Vehículos Aeroespaciales, E.T.S. de Ingenieros Aeronáuticos, Universidad Politécnica de Madrid, 28040 Madrid, Spain;3. Departamento de Vehículos Aeroespaciales, E.U. Ingeniería Técnica Aeronáutica, Universidad Politécnica de Madrid, 28040 Madrid, Spain;4. Ain Shams University, El Cairo, Egypt;5. Departamento de Ciencia de Materiales, Universidad Politécnica de Madrid, E.T.S. Ingenieros de Caminos, Canales y Puertos C/Profesor Aranguren s/n, 28040 Madrid, Spain |
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| Abstract: | This paper presents a numerical procedure for bond between indented wires and concrete, and the coupled splitting process of the surrounding concrete. The bond model is an interface, non‐associative, plasticity model. It is coupled with a cohesive fracture model for concrete to take into account the splitting of such concrete. Bond between steel and concrete is fundamental for the transmission of stresses between both materials in precast prestressed concrete. Indented wires are used to improve the bond in these structural elements. The radial component of the prestressing force, increased by Poisson's effect, may split the surrounding concrete, decreasing the wire confinement and diminishing the bonding. The combined action of the bond and the splitting is studied with the proposed model. The results of the numerical model are compared with the results of a series of tests, such as those which showed splitting induced by the bond between wire and concrete. Tests with different steel indentation depths were performed. The numerical procedure accurately reproduces the experimental records and improves knowledge of this complex process. Copyright © 2010 John Wiley & Sons, Ltd. |
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| Keywords: | concrete prestressed concrete bond‐splitting fracture modelling finite element |
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