Определение рационального монолитного железобетонного перекрытия с помощью ПК «Лира-САПР 2013»

Problem formulation. In the modern period of the development of our society and in conditions of the tough market competition the main indicators of the construction efficacy is economy, shorting of the construction period and shorting of the land area for construction. First of all, it is necessary reduce its prime cost to ensure ordinary citizens with the available dwelling. With increasing prices for building materials and energy supplies the only one way to ensure ordinary citizens with the available dwelling is using rational constructive schemas and effective building constructions.Nowadays, frame systems from monolithic concrete are mostly used for high-rise buildings where vertical and horizontal loads are perceived by rigidity diaphragms and frame constructions.That’s why a lot of factors influence a choice of constructive decisions. Taking into account these factors let choose the best constructive decision on the base of various designing.Analysis of publications. With implementing DBN V.2.6-98:2009 «Concrete and reinforced concrete constructions. Main positions» SNiP 2.03.01-84 «Concrete and reinforced concrete constructions». The analysis of modern program complexes of the calculation of building constructions showed that PC LIRA-SAPR is the only one complex which calculate reinforced concrete constructions of buildings according to DBN V.2.6-98:2009. The goal of the work is a value of the efficacy of variants of constructive decisions of the monolithic overlapping of the building by the comparison of main technical and economical indicators. For the analysis two variants of monolithic overlapping are accepted: the flat overlapping with plates leaned outline (variant № 1) and ribbed overlapping with plates leaned outline (variant № 2).For the analysis of variants of the overlapping main tasks were solved:making calculation models of the overlapping in PC AutoCAD and the import in PC LIRASAPR;calculation and choosing the armature in overlapping plates in PC LIRA-SAPR;comparison of the technical and economical indicators of both variants.Conclusion. The analysis of the technical and economical indicators notes that the variant № 2 is more economical more than 12.5 % than the variant № 1 according to concrete spending and more than 21 % according to the armature usage. Due to calculations of building cost and building labor content the variant № 2 is more effective. It is cheaper more than 15 % than the variant № 1 and due to labor content the variant № 2 is better more than 14 %.Calculations results show that the variant № 2 is more effective economically the variant of monolithic ribbed overlapping with plates leaned outline.