Análise numérica de lajes em balanço maciças e nervuradas

Abstract

Considering that a better design of a structural project can improve the performance of the structural elements, provide an increase in the spans of the same and reduce inputs that have greater significance in the final cost of the work, through materials with lower weight to compensate materials without function structural analysis and research on the behavior and interaction between adjacent and adjacent slabs in order to determine the boundary dimensions of spans for solid and ribbed slabs and how to design the adjacent slabs to provide better performance on the slab. To do so, it is necessary to establish maximum values of effort for the design according to the span and adjacent slabs, to compare the armature rates per meter constructed to establish the influence generated in the element when there is a variation of dimensions in the adjacent slabs and in the length on balance sheet. A research of a descriptive nature with regard to the objectives and quantitative with regard to the results is carried out, since a comparison will be made between the consumption of inputs, efforts and maximum deformations of structural elements executed in two technologies, values that will be obtained from the calculation performed in a software of sizing of reinforced concrete, CypeCad. In view of this, it can be verified that the massive slabs have a maximum balance length of 3.00 m with a thickness of 15 cm and the ribs 4,00 m, the slabs presented the same curvature characteristics after the deformations, but with different values , the ribbed slabs met the maximum limits prescribed by the Brazilian norms and the massive ones had few cases that met these limits, the maximum efforts always occurred in the massive slabs when compared to the same shape plants and the effort, independent of the region, had similar behavior to second-order curves as the balance length increased with few points that deviated from this standard, slabs with lower lengths in the y direction (perpendicular to the balance) presented lower steel consumption for the slabs execution and that the elongation in the balance direction favors even more so as to reduce consumption, which makes it necessary to note that the ribbed slabs the benefits to be taken as the technique to be used and that the best arrangement of the slab associated with a balance sheet is larger in the direction of the balance and smaller in the perpendicular direction.