DESENVOLVIMENTO DE ÁBACO PARA PRÉ-DIMENSIONAMENTO DE LAJE ALVEOLAR PROTENDIDA

Abstract

Prefabricated elements have increasingly stood out in the market due to great advantages, among them their production in an industrial environment. The prestressed hollow core slab, being a widely used element in this context, stands out due to its excellent performance and suitability for current quality requirements. However, there is a lag regarding its study in Brazil, highlighting the importance of the study and production of abacus for prestressed hollow core slabs pre-sizing, evaluating the relationship between the theoretical span and the load capacity. This work seeks to elaborate this abacus with a slab height of 20 centimeters, starting from a pre-defined prestressing area and exploring the dimensioning in the Limit State of Decompression Service. The values result in a graph that shows that the relationship between span and overload is not linear. It is then concluded that the produced abacus, focused on exposing the normative criteria, presented a path, starting from the setting of the prestressing area, which may differ if a different parameter is set.