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Hollowcore slabs are commonly used for floor and roofs of residential and commercial buildings. Extensive research has been done on precast structures, but only limited studies have been done on the cast-in-place diaphragm's tie-beams modeling aspects. This article presents a methodology of modeling precast concrete floor rigid diaphragm made of hollowcore slabs with the cast-in-place tie beams and evaluating its accuracy. two types of model were designed:1. whole rigid slab supported on two opposite sides only (one-way slab); 2. discrete slabs with parallel cast-in-place diaphragm struts. Designed load is q=1 t/m2, for in-plane rigidity analysis the lateral force P=1 t is considered. The study slab thickness is 120 mm. The concrete class concrete B25 (Eb = 30 MPa – tangent modulus of elasticity of concrete B25; E = 18.5 MPa – secant modulus of elasticity). The analyses were conducted using the LIRA-SAPR software package. The modeling process is illustrated in detail. The diagrams of bending moments and deflections are presented, comparison between the two models was done. Both methods give correct results, reflecting the actual structural action of the precast concrete hollowcore floor. [ABSTRACT FROM AUTHOR]

The assessment procedures of an individual building rely on different parameters and the best way to determine all of these parameters is through modeling the building using a modern finite element method software integrated into building information modeling workflow with all the relevant information and detailing. Visual programming tools are becoming increasingly popular and efficient in terms of automatization of the modeling process in the construction and design process. Using the LIRA-SAPR software package this study presents an algorithm and key features of the proposed methodology of the modeling of the reinforced concrete large panel buildings with SAPFIR-Generator visual programming tool and describes a design of a visual model in the case example. From a large-scale perspective this modeling methodology could be a vital part in developing a system of building's structural condition assessment in urban areas; sufficiently decrease the complexity of the modeling and increase its quality, reliability, and flexibility for further improvements. [ABSTRACT FROM AUTHOR]