Constellation, le dépôt institutionnel de l'Université du Québec à Chicoutimi

Résumé

In order to evaluate the performance of drilled-in bonded shear reinforcement, two series of largescale slabs were tested before and after shear strengthening. Experimental results indicate that the 2006 Canadian Standard and the 2010 fib Model Code provisions overestimate the shear strength of such strengthened slabs by about 29% if the drilled-in shear reinforcement is assumed to be totally effective. The main goal of this research is to develop a method for predicting the shear strength of slabs with bonded shear reinforcement. A non-linear finite element model using the program VecTor2 was used to study parameters influencing the slab behaviour up to failure. Results showed that both the behaviour and ultimate strength of slabs are predicted well by the model while taking account of a stress-slip relationship for the bonded reinforcing bars. Moreover, the experimental observations during the loading corroborate the cracking pattern predictions.