Structural Engineering and Mechanics

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Numerical study of mono-strand anchorage mechanism under service load

  • Marceau, D. (Department of Applied Sciences, University of Quebec at Chicoutimi) ;
  • Fafard, M. (Department of Civil Engineering, Laval University) ;
  • Bastien, J. (Department of Civil Engineering, Laval University)
  • Published : 2004.10.25
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Abstract

Anchorage devices play an important role in post-tensioned bridge structures since they must sustain heavy loads in order to permit the transfer of the prestressing force to the structure. In external prestressing, the situation is even more critical since the anchorage mechanisms, with the deviators, are the only links between the structure and the tendons throughout the service life of the structure. The behaviour of anchorage devise may be studied by using the finite element method. To do so, each component of the anchorage must be adequately represented in order to approximate the anchor mechanism as accurately as possible. In particular, the modelling of the jaw/tendon device may be carried out using the real geometry of these two components with an appropriate constitutive contact law or by replacing these components by a single equivalent. This paper presents the numerical study of a mono-strand anchorage device. The results of a comparison between two different representations of the jaw/tendon device, either as two distinct components or as a single equivalent, will be examined. In the double-component setup, the influence of the wedge configuration composing the jaw, and the influence of lubrication of the anchor, will be assessed.

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References

  1. Bastien, J. (1992), "Comportement des te^tes d'ancrage mono et multi-torons: Etude experimentale et etude par elements finis", Ph.D. thesis, Departement de genie civil, Universite Laval, Québec.
  2. Bastien, J., Marceau, D., Fafard, M. and Ganz, H. (2002), "Mechanical behaviour of multistrand anchorage mechanisms under service and ultimate loads", J. Bridge Eng., ASCE, Submitted.
  3. Laursen, T.A. and Simo, J.C. (1993), "A continuum-based finite element formulation for the implicit solution of multibody, large deformation frictional contact problem", Int. J. Num. Meth. Engng., 36, 3451-3485. https://doi.org/10.1002/nme.1620362005
  4. Marceau, D. (2001), "Modelisation du contact tridimensionnel en grands deplacements relatifs et son application a l'etude des dispositifs d'ancrages multitorons", Ph.D. thesis, Departement de génie civil, Universite Laval, Qu´ebec.
  5. Marceau, D., Bastien, J., Fafard, M. and Chabert, A. (2001a), "Experimental and numerical studies of monostrand anchorage", Int. J. Struct. Eng. Mech., 12(2), 119-134. https://doi.org/10.12989/sem.2001.12.2.119
  6. Marceau, D., Fafard, M. and Bastien, J. (2002), "Constitutive law for wedge-tendon gripping interface in anchorage device - Numerical modeling and parameters identification", Int. J. Struct. Eng. Mech., 15(6), 609-628.
  7. Marceau, D., Fafard, M., Bastien, J. and Boudjelal, M. (2001b), "Application des reseaux neuromimetiques a la determination du comportement deformationnel d'un dispositif d'ancrage multitorons", In "Actes du cinquieme colloque en calcul des structures", 1, 189-196. Ed. Batoz, Ben Dhi & Chauchot (Tecknea, Toulouse), Giens, France.