ESTUDO DO COMPORTAMENTO DE LAJES, VIA ANALOGIA DE GRELHA

Abstract

The objective of this study was to evaluate the deflection produced by slabs of different dimensions using a software, principle is the analogy of equivalent grids. Three solid and concrete slabs were analyzed, in order to obtain the displacements, the computational program Equivalent Grids was adopted, the values found were compared with analytical references. As it is not possible to choose the supports adopted for the slab calculations through the software, and this is a factor that can influence the values of the deflection, the analytical references were calculated considering the adoption of different types of support, and the method of abacus by binding of slabs. Based on the results presented, the displacement analysis software for solid slabs obtained values within the limits of 15% established for this study, in at least one of the calculation methods. On Slab 1 alone, there was a difference of 12% between the analytical reference value and the value generated by the software, but when applying the abacus method of linking slabs, for the same interconnected slab the error was reduced to 4.65%. In Slab 2, the slab linking abacus method resulted in an error of 13.33%, while in L3, the bi-supported calculation method resulted in an error of 4.72%. However, in none of the cases, the displacement values obtained by the software were close to the analytical values that adopted the crimp as one of the supports. In general, the software was useful for analyzing displacements in massive slabs, but improvements and more data are need to obtain more accurate and reliable results.