ABSTRACT
This paper discusses the influence of instances and quantity of filled cores on shear strength gain of pretensioned precast concrete hollow core slabs, by means of a theoretical study that uses the available equations given by ABNT NBR 14861 [3[3] ASSOCIAÇÃO BRASILEIRA DE NORMAS TÉCNICAS. NBR 14861 Laje pré-fabricada – Painel alveolar de concreto protendido - Requisitos, Rio de Janeiro, 2011.] for shear strength calculation, and an experimental study where slabs without core filing, with 02 or 04 cores filled before or after the release of the strands prestressing in the casting bed, were tested under shear strength. The theoretical study confirms the advantage of the core filling execution after the release of prestressing, converging from experimental study when 04 cores were filled and diverging from this when 04 cores were filled.
Keywords:
Hollow core slab; core filling; shear strength; precast concrete
