Analysis of the influence of various factors on the deflections of profiled flooring during slab concreting
Abstract
Analysis of the influence of various factors on the deflections of profiled flooring during slab concreting
Incoming article date: 06.04.2024The work reflects the results of the influence of various factors on the deflections of the profiled flooring at the stage of concreting the slab. The relationship between the deflections of corrugated sheets in parts of its span and in parts of the total thickness of the slab at different heights of the design section of the slab has been established. The purpose of the work was to study the influence of various factors (the thickness of the corrugated sheet, the profile and height of the corrugations, the span of the slab) on the deflections of the profiled decking at the stage of concreting the slab, taking into account the recommendations of the standards. The work also studied the influence of the acquired deflection on the final deflections during the operation stage. The object of the study was a floor slab on profiled flooring. A calculation and analytical research method was used based on current regulatory documents. Research results. An assessment is made of the influence of corrugated sheet deflections on the applicability of various corrugated sheet spans in the range of spans from 3 to 6 m. Recommendations are proposed for limiting the maximum deflections of corrugated sheets at the stage of concreting the slab to 1/100 of the design span of corrugated sheets with a slab section height of more than 200 mm. Recommendations are given to limit the use of small thicknesses of corrugated sheets from 0.7 to 1.0 mm for spans over 3 m. Conclusions. Based on the results of the study, recommendations were developed for the use of optimal thicknesses of floor slabs on profiled flooring for various spans. Recommendations are given for limiting the thickness of the corrugated sheet depending on the span and the overall height of the slab section. The research results can be used in the design of steel-reinforced concrete floor slabs and in practical work when examining the technical condition of structures.
Keywords: concreting stage, corrugated sheet, deflection, profiled flooring, steel-reinforced concrete slab