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Bond modelling of prestressed concrete during the prestressing force release

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Abstract

This paper presents an analytical model for simulating the bond between steel and concrete, in precast prestressed concrete elements, during the prestressing force release. The model establishes a relationship between bond stress, steel and concrete stress and slip in such concrete structures. This relationship allows us to evaluate the bond stress in the transmission zone, where bond stress is not constant, along the whole prestressing force release process. The model is validated with the results of a series of tests, considering different steel indentation depths and concrete covers and is extended to evaluate the transmission length. This capability has been checked by comparing the transmission length predicted by the model and one measured experimentally in two series of tests.

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Acknowledgements

The authors gratefully acknowledge the financial support for the research provided by the Spanish Ministerio de Ciencia e Innovación under grant BIA-2008-03523 and by the Ministerio de Fomento under grants MFOM-2004/9 and MFOM-01/07.

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Authors and Affiliations

  1. Departamento de Vehículos Aeroespaciales, E.T.S. de Ingenieros Aeronáuticos, Universidad Politécnica de Madrid, 28040, Madrid, Spain

    José M. Benítez

  2. Departamento de Ingeniería Civil: Construcción, E.T.S. de Ingenieros de Caminos, Canales y Puertos, Universidad Politécnica de Madrid, 28040, Madrid, Spain

    Jaime C. Gálvez

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  1. José M. Benítez
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  2. Jaime C. Gálvez
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Correspondence to Jaime C. Gálvez.

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Benítez, J.M., Gálvez, J.C. Bond modelling of prestressed concrete during the prestressing force release. Mater Struct 44, 263–278 (2011). https://doi.org/10.1617/s11527-010-9625-5

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