Ocena porównawcza ugięć płyt żelbetowych z pustkami: Analiza MES i obliczenia ręczne

This article presents a comprehensive comparative study of deflection voided reinforced concrete slabs, evaluating the resultsobtained through Finite Element Method (FEM) analyses of various accuracy and manual calculations, specifically employingthe method of strips. Distinct methodologies used for analysis are: FEM analysis using SCIA Engineer, where voids in the slabare accounted for by adjusting the modulus of elasticity and self-weight of concrete. The slab is modelled by using 2D slabelements, allowing for efficient and relatively fast examination of structural behaviour and FEM analysis in ANSYS WorkbenchMechanical, where voids are modelled within a 3D solid representation of the entire slab. This approach should provide thebest representation of a real structure as it models all its elements with their respective physical attributes. Results of FEManalyses would be compared not only to each other, but also with results of manual calculations, if possible. Calculations thatare going to be used are based on the method of strips, a traditional approach for analysing deflection of reinforced concreteslabs. The comparative analysis encompasses calculations of deflection of voided reinforced concrete slabs with variousgeometrical properties and boundary conditions. The findings aim to contribute to the engineering community by elucidatingthe strengths, limitations, and trade-offs associated with each respective type of FEM analysis, as well as manual calculations,when it comes to assessing the deflection of voided reinforced concrete slabs.