Comparative Analysis and Design of Flat and Grid Slab System in Multi-Storeyed Building Under Seismic Condition

The study concludes that the seismic performance of slab systems depends on stiffness, load transfer mechanism, structural configuration and lateral force resistance. Flat slab systems provide architectural flexibility, reduced floor height and faster construction, but they are more sensitive at slab-column junctions due to punching shear risk. Grid slab systems show higher bending moment, shear force and base shear, indicating greater stiffness, better load distribution and improved load-carrying capacity. Two-way slab systems provide balanced seismic performance and controlled structural response compared with flat slab and grid slab systems. Storey drift and displacement increase with building height in G+2, G+5 and G+8 models, showing the need for proper stiffness control in seismic design. Overall, grid slabs are suitable for higher stiffness requirements, while flat slabs should be used with shear walls, drop panels and proper seismic detailing.

1.        Patel, A., & Padamwar, S. (2017). Studying the response of flat slabs and grid slabs systems in conventional RCC buildings. Indian Journal Scientific Research, 14(2), 516–521. 2.        Coelho, E., Candeias, P., & Anamateros, G. (2004). Assessment of the seismic behaviour of RC flat slab building structures. 13th World Conference on Earthquake Engineering, 2630. 3.        Durrani, A. J., Mau, S. T., AbouHashish, A. A., & Li, Y. (1994). Earthquake response of flat-slab buildings. Journal of Structural Engineering, 120(3), 947–964. 4.        El-Dardiry, E., Wahyuni, E., Ji, T., & Ellis, B. R. (2002). Improving FE models of a long-span flat concrete floor using natural frequency measurements. Computers and Structures, 80(27–30), 2145–2156. 5.        Erberik, M. A., & Elnashai, A. S. (2004). Fragility analysis of flat-slab structures. Engineering Structures, 26(7), 937–948. 6.        Erberik, M. A., & Elnashai, A. S. (2006). Loss estimation analysis of flat-slab structures. Natural Hazards Review, 7(1), 26–37. 7.        Harish, M. K., Ashwini, B. T., Chethan, V. R., & Sharath, M. Y. (2017). Analysis and design of grid slab in building using response spectrum method. International Journal for Research Trends and Innovation, 2(6). 8.        Jamle, S., Verma, M. P., Dhakad, V., & Prof, A. (2017). Flat slab shear wall interaction for multistoried building under seismic forces. International Journal of Software & Hardware Research in Engineering. 9.        Kaulkhere, R. V., & Shete, G. N. (2017). Analysis and design of flat slab with various shapes. International Journal of Scientific Development and Research. 10.     Bakale, M. Seismic behavior of multi-story structure with different types of slabs. International Journal of Civil Engineering and Technology.