Golovko D. Stress-Strain State of the Steel-Concrete Hollow Core Slabs

The object of research is a reinforced concrete hollow core slab. The purpose of research is the development of the constructions of steel-concrete hollow-core slabs and the research of their stress-strain state (SSS) by experimental, analytical and numerical methods. The methods of the research are experimental studies of SSS and bearing capacity of steel-concrete hollow core slabs, methods of struc-tural mechanics, strength of materials, computer-modeling of the constructions using the computer program, which implements the finite element analysis (FEA). The novelty of research - new data is obtained in the result of experimental studies of bearing capacity, deformability and cracking of steel-concrete slabs with voids under static load; firstly data about the effect of voids and their size on the stress-strain state and the carrying capacity of steel-concrete core slabs is obtained; new three-dimensional finite elements of a model of steel-concrete hollow-core slabs are proposed and developed, which can help to explore the patterns of change in their stress-strain state by varying the constructional parameters; for the first time the analysis of the stress-strain state of the steel-concrete hollow core slabs with the help of numerical methods taking into account the physical nonlinearity of the concrete layer and the geometric nonlinearity of steel sheet is performed. The results - steel-concrete hollow slabs constructions are designed and their stress-strain state by experimental, analytical and numerical methods is studied. The potential use is construction and reconstruction of industrial objects.