Análise e dimensionamento estrutural de uma laje lisa com protensão não aderente

Abstract

In the early twentieth century, were done the first applications of prestressing in structural elements, with great development of its technology by Frenchman Eugène Freyssinet. The first prestressed work in Brazil was the Galeao’s bridge in Rio de Janeiro, built in 1949, whose design was developed in France by Eugène. Based on contemporary civil construction, according to the marketing characteristics, progressively, it has been sought a better performance of materials and construction systems, leading the materials to closer conditions to their limits. The prestressing system enables designers to work in a more daring way and with greater architectural freedom, larger spans, corresponding to current market need. Thinking about it, this work aims to analyze, to measure and to detail a constructive system of flat slabs with nonstick prestressing in order to use it at the libraries project of the Federal University of Pampa (UNIPAMPA). Verifications of limit conditions for the structure will made, following some Brazilian and American standards, aiming to guarantee the stability of it. With the intention of complementing the work, were developed detailing of prestressed part, providing necessary resources for implementing it, if the system is adhered by the University. To express the results, it was developed a calculating memorial, containing analysis, calculations and verifications, which allowed the detailing of the system, represented in the form of figures. The verifications of serviceability limit, conditions to rupture, fissuration, shearing, arrows and decompression, were satisfactory as to their limits, even those relating to the ultimate limit conditions. Having done this, there was obtained active and passive armature required to maintain the stable structure. The results were liable to the details of the structure.