Résumés et articles > Résumés : par auteur > Sdiri Ahlem

The main of this article is to deal with a numerical and analytical study of the thermal radial
crack in the early age concrete reinforced with GFRP rebar. In fact, the difference between the
radial thermal expansion coefficient of GFRP rebar and its similar of the concrete leads the
appearance of cracking in the hardened concrete around the GFRP reinforcement rebar. The
early age concrete behavior is described by the hydration process that was numerically
developed using the finite element software ABAQUS. Hence, numerical simulations have
been established in order to evaluate the cracks behavior in the early age concrete reinforced
with GFRP rebar. The thermal strain depending on the concrete's hydration degree has been
taken in account in the numerical simulation. Mazar's damage model has been taken in account
in order to describe the concrete‘s cracking. An analytical model has been applied on a
particular case: early age concrete. In fact, the thermo-mechanical proprieties of early age
concrete depend mainly on the hydration degree. The numerical simulations prove the
appearance of damage in the early age concrete that exists around the GFRP reinforcement. On
the other hand, a comparison between the numerical results and the analytical ones has been
established. A similarity between those results has been deduced. Besides, the time of
appearance of the early age and the variation of the radial concrete's stress have been
numerically and analytically estimated.