Resistance of steel-reinforced concrete structures of the elevator working tower floor structures under dynamic loads

Abstract The article examines the resistance of steel-reinforced concrete structures in elevator working towers to dynamic loads generated by grain cleaning machines. The study focuses on analyzing the dynamic behavior working towers of grain storages, assessing resonance risks, and improving structural stability during operation. Resonance from dynamic loads caused by grain cleaning machines poses significant structural risks. Modal analysis was conducted to identify the natural frequencies and vibration modes of the structure. Calculations utilized the LIRAFEM software package, with further modeling performed in Autodesk Revit. By comparing the natural frequencies of the structure with the vibration frequency of the machines, the potential for resonance was evaluated. The scientific novelty lies in applying steel-reinforced concrete floors on a profiled platform in elevator working towers, with emphasis on variations in slab thickness and stud bolt diameters. This design approach effectively reduces vibration amplitudes, enhances structural stability, and ensures reliable operation of grain cleaning equipment. Modal analysis identified the closest natural frequencies of the structure as 4.51 Hz and 5.95 Hz, with deviations from the machine operating frequency of 5 Hz calculated at 9.72% and 19.02%, respectively. These results confirm the alignment of the structural design with the operating parameters of the equipment. Future research will explore how slab thickness affects the dynamic characteristics of these floors.