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Micro-Mechanical Modeling of the Pull-Out Behavior of Corrugated Wiredrawn Steel Fibers from Cementitious Matrices.

Published online by Cambridge University Press:  16 February 2011

Gilles Chanvillard  and
Pierre-Claude Aitcin
Gilles Chanvillard
Affiliation:
Laboratoire Géomatériaux, E.N.T.P.E., 69518 Vaulx-en-Velin Cedex, FRANCE
Pierre-Claude Aitcin
Affiliation:
Civil Eng. Dept., University of Sherbrooke, Sherbrooke, Québec, JIK 2R1, CANADA
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Abstract

The pull-out behavior of non-straight steel fibers cannot always be analyzed solely in terms of bonding. Rather, it is necessary to take into account the mechanical anchorage provided by the fiber geometry.

It is shown in this paper, that in the case of non-straight steel fibers a strong interaction exists between bonding and anchorage. A micro-mechanical model, based on the dissipation of energy during slipping of the fiber is proposed. In this model, bonding is included on the basis of the Coulomb friction law, without reference to a bond-slip law; mechanical anchorage is modelled from plastic deformation of the fiber.

With this model, it is possible to evaluate the significance of some physical parameters such as the water/cement ratio of the matrix, the fiber's geometry and the steel properties. Moreover, this model provides a rational basis for the optimization of the fiber-cementitious matrix interaction from an energy point of view.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 211: Symposium O – Fiber-Reinforced Cementitious Materials , 1990 , 197
Copyright
Copyright © Materials Research Society 1991

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