EFFICIENCY RESEARCH OF MONOLITHIC LIFT- SLABS IN MULTISTOREY SKELETON BUILDSNGS

Abstract

One of the priority directions of modern construction is the construction of framemonolithic multi-story buildings with beamless ceilings. The use of a frame-monolithic scheme of house construction makes it possible to diversify thearchitectural and planning solutions of apartments and houses, as well as to significantly shorten the terms of their construction.The experience of construction and operation of frame-monolithic buildings shows that floor slabs are the most material-intensive element of the frame. At the same time, the consumption of concrete is more than 30.0% of the total volume of concrete in the building. Therefore, the problem of reducing the mass of the ceiling is urgent.The search for a reserve for reducing the consumption of concrete in floor slabs is accompanied by an increase in the deformability of lightweight slabs, as well as an additional concentration of compressive stresses in the places where the slabs reston vertical elements. The indicated zone of butt connection needs additional reinforcement in order to ensure compressive strength.The article examines ways to reduce the material consumption of floor slabs, and gives an assessment of the above-mentioned factors that affect the workof slabs as part of the building frame. Numerical studies of the calculation model of the building in Kyiv were carried out using PC LIRA CAD, on the basis of which the parameters of the stress-strain state of the experimental plates were established, aswell as the justified conditions of their use for further operation in the practice of frame-monolithic house construction.