Abstract
Behavior of reinforced concrete slabs with composite patches under centric punching load is presented in this paper. An experimental investigation is being performed. The parameters considered are: the ratio of patch size and the nature of the composite. Several reports are considered to account for the strengthened specific area. The dimensions of the patches are calculated so that the ratio patch XP /YP is proportional to XD/ YD of the slab. Two types of composite CFRP and composite with cork fibers reinforcement are also considered in this study. The main objective is to evaluate the resistance of the concrete slabs reinforced by such composite patches and to define the parameters influencing the stiffness behavior. Using the Kinnunen and Nylander mechanism of rupture, an analytical model to predict the behavior of this type of tiles is proposed. An experimental investigation completed by theoretical modeling is carried out in order to assess the performances of the concrete slabs reinforced with composite patches under centric punching load. The average test and numerical results based on the finite element analysis in terms of overall and observed response are discussed and analyzed. The results show an improvement in terms of strength and mechanical performance function of the ratio of the dimensions of the composite patch which have a direct influence on the deformation before rupture.
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