INTEC   05402
INSTITUTO DE DESARROLLO TECNOLOGICO PARA LA INDUSTRIA QUIMICA
Unidad Ejecutora - UE
artículos
Título:
Mesoscopic model to simulate the mechanical behavior of reinforced concrete members affected by corrosion
Autor/es:
P.J. SÁNCHEZ; A.E. HUESPE; J. OLIVER; S. TORO
Revista:
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
Editorial:
PERGAMON-ELSEVIER SCIENCE LTD
Referencias:
Año: 2010 vol. 47 p. 559 - 570
ISSN:
0020-7683
Resumen:
In this contribution, a finite element methodology devised to simulate the structural deterioration of
corroded reinforced concrete members is presented. The proposed numerical strategy has the ability
to reproduce many of the well-known (undesirable) mechanical effects induced by corrosion processes
in the embedded steel bars, as for example: expansion of the reinforcements due to the corrosion product
accumulation, damage and cracking patterns distribution in the surrounding concrete, degradation of
steelconcrete bond stress transfer, net area reduction in the reinforcements and, mainly, the influence
of all these mentioned mechanisms on the structural load carrying capacity predictions.
At the numerical level, each component of the RC structure is represented by means of a suitable FE
formulation. For the concrete, a cohesive model based on the Continuum Strong Discontinuity Approach
(CSDA) is used. Steel bars are modeled by means of an elasto-plastic constitutive relation. The interface is
simulated using contact-friction elements, with the friction degradation as a function of the degree of
corrosion attack. Two different (and coupled) mesoscopic analyzes are considered in order to describe
the main physical phenomena that govern the problem: (i) an analysis at the cross section level and
(ii) an analysis at the structural member level.
The resultant mechanical model can be used to simulate generalized reinforcement corrosion. Experimental
and previous numerical results, obtained from the available literature, are used to validate the
proposed strategy.