Lajes pré-moldadas nervuradas unidirecionais em concreto armado : análise teórica e experimental de nervuras.

Abstract

This work pretends to analyze the calculation method to dimension ribbed slabs with armed concrete joist, determining solicitations in the bound states of service and last, compare the charges supported experimentally with the obtained at the theorical models, through the analysis of four ribs and then, contribute to the development of slab projects made with joists. In this work it was made tests in ribs with pre molded joists of armed concrete, shaped bu joists, compression cover in concrete and two sides of filling elements in EPS, aiming to determinate the capacity of resistent charge of them and lately compare with the limit charging obtained by the theorical model. To make the flexion tests the joists were submited to two points of charge application, simulating a pure flexion situation at the "medium third" of them and from two horizontal mobile support aiming to avoid the horizontal forces. To measure the vertical displacement, a digital equipment was at the two first ribs, not being used at the four ribs because of its limitation of measuring amplitude of displacement, so at this ribs the displacement measures was through the test equipment. At the end of this research, based on the analyzed results, it was possible to show conclusions about the precision and reliability levels of the calculation forms compared to the real behavior of this kind of structural component, just like the features and structural behavior of the ribbed slabs in armed concrete joists.