Lajes alveolares pré-fabricadas: Estudo da influência do número e do instante de preenchimento de alvéolos no ganho de resistência à força cortante

Abstract

This paper discusses the influence of instances and quantity of filled cores on shear strength gain of pre-tensioned precast concrete hollow core slabs, by means of a theoretical study that uses the available equations given by ABNT NBR 14861 [3] for shear strength calculation, and an experimental study where slabs with-out 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 execu-tion after the release of prestressing, converging from experimental study when 04 cores were filled and di-verging from this when 04 cores were filled.