Avaliação dos deslocamentos em vigas de concreto por meio de análise experimental e numérica

Abstract

With the advances of engineering, the structures have been projected ever more slender, in order to design projects increasingly attractive in the architectural aspects, as in economic issues, with the reduction of the volume of concrete required in structural parts. As a result, the beams are more likely to exhibit cracking and displacement problems due to their low stiffness. Therefore, the present work had the objective of molding prismatic specimens in order to analyze the tensile strength in the flexion and the displacement in beams by means of comparator clocks and strain transducers, LVDTs. The tested beams were also modeled in the Ftool® and ABAQUS® programs to obtain displacements by the Displacement Method (MD) and the Finite Element Method (FEM), respectively. The results obtained by the laboratory tests were very similar to those obtained by computation. Also, it was possible to observe that the use of clocks and LVDTs, when correctly instrumented, are satisfactory for obtaining results. While clocks are less accurate and more difficult because they require manual readings to be performed by the test performer, LVDTs use computer-based data acquisition and are more efficient and accurate for this purpose.