DOI: 10.36347/sjet.2024.v12i06.002

Pages: 185-191

Investigation on the influence of drop panels on the natural period of vibration of flat slab building structures has been conducted in this study. Drop panels are structural elements projected beneath slabs around columns to enhance stiffness and structural capacity. Numerical modeling was performed for flat slab building structures with and without drop panels using ETABS software. Modal analysis was employed to determine the natural vibration periods of the structures in their initial modes. The results indicate that the use of drop panels significantly reduces the natural vibration period of the structure. In structures with drop panels, the natural vibration period values for mode 1 and mode 2 were 0.7493 seconds, whereas in structures without drop panels, the natural vibration period values for mode 1 and mode 2 were 0.8380 seconds. The difference of 0.0887 seconds indicates an overall increase in structural stiffness with the presence of drop panels. A lower natural vibration period implies increased resistance of the structure to lateral forces such as seismic. The effectiveness of drop panels in reducing natural vibration periods depends on factors such as drop panel dimensions, structural materials, and applied structural loads. This study contributes to understanding the influence of drop panels on the dynamic behavior of flat slab building structures and provides guidance in designing optimal structures for lateral force resistance.