Reforço de vigas de concreto armado submetidas à flexão com compósito contendo fibras de juta

Abstract

The use of natural fibers of vegetable origin, for structural reinforcement, has been applied with some advantages over synthetic fibers, vegetable fiber is a biodegradable material, is not detrimental to health and it becomes more economical in relation synthetic fibers. The efficiency of these reinforcements has been proven by the results of various experimental studies carried out throughout the world. This study aims to test the concrete beams efficiency with minimum reinforcement through experimental tests, applying the reinforcement technique to bending with composite containing jute fibers in the pulling. Two beams were tested, the first is the reference beam, ie, without the application of the reinforcing beam and the second beam is reinforced with two layers of jute fibers. In the study analyzed data from the deformation of the steel bars, the deformations in the concrete and vertical displacements and compared with data obtained by theoretical calculation. From the analysis made, it is clear that further gave a good performance, obtaining gain of rigidity and an approximate gain of 20% load. The strengthening of execution presented no major difficulties, and was executed quickly and without the need for labor-skilled labor.