The purpose of this research is to study what the crosscurrent representation format of core slabs is for samples of different length, by investigating the effect of the above factors on the load-bearing and stress-related properties, as well as the cracking load. The authors examined samples of slabs of different length, freestanding and working in bending, with a cross-section in a natural form, in comparison with samples of similar length in an I-beam shape. The samples were systematically loaded an interval of one kN until the yield point of reinforcement in the tension area was reached. The authors completed a numerical study of core slabs in a nonlinear setting. The researchers designed load-deflection plots when modeling the corresponding lengths of samples with a natural and I-beam form of section. The scholars received and compared results with loading of the cracked condition, midspan deflections with a rupturing load. They found out that the length of the slab affects the calculation results of the shapes issued: the shorter the length, the more highlighted deviation in the load-deflection plots. The authors suggested correction coefficients to perform a refined calculation of slabs for cracking, deflection, and rupturing loads.

It is a known fact that core slabs are introduced as I-shaped beams (T-beams) to simplify calculations and are considered according to the beam theory. However, such a view may cause erroneous calculation results. This is particularly evident when calculating the second group of limit states. The aim of this survey is to examine the influence of the cross current representation of core slabs for samples of various length by defining the impact of these factors (the shape of the cross-section and length) on the bearing and nonrigid capacity as well as a cracking load. The paper makes the calculating theory of reinforced concrete framing clear, in particular, core slabs according to the limit states. The author dwells upon samples of slabs of various lengths with a natural cross-sectional shape in comparison with I-shaped samples of similar length. The author should emphasize that it is assumed both in analytical calculations and in software based on FE analysis in order to save time and computing resources. The author performs a computational investigation of core slabs in a nonlinear setting with forming a plastic centroid in the middle of a slab in the study. It is found out that the slab length affects the calculation results of the considered shapes. The shorter the length, the clearer cut the deviation in the load deflection plots.

The purpose of this study is to examine BIM technologies for engineering and design of modern buildings, as well as investigate problems when applying those BIM technologies and suggest the appropriate ways to rectify them. The researchers designed the university building in their study. They took into account current regulations and ergonomic decisions. The design was carried out based on the Building Informational Model (BIM) technologies by the Revit Structure software. There is already information concerning physical and heat-mechanical properties of materials contained in the software. This technology allows one to step up progress on the designer’s work, lets him create a design model of the building not from scratch, as well as sets the properties of its elements. The university information model is a four-storeyed rectangular building deformed on four sides in the form of a concave lens. This research is devoted to the use of building information modelling and BIM technologies for the design of the genuine architectural and construction concept. Although, they had special difficulty with the import of the information model obtained in Revit Structure into a LIRA SAPR computational scheme.