Deformation Capacity Evaluation for Flat Slab Seismic Design Using Finite Element Software

Abstract This paper studies the seismic behavior of flat slabs according to different thickness slab, reinforcement detailing, and material strength. Both the deformation capacity and strain energy absorption and plastic deformations of flat slabs under simulated seismic loading are analyzed via Finite Element Analysis (FEA). The findings show that if the slab thickness is increased, it can increase the stiffness and reduce the displacement, as well enhancing the energy absorption. Larger reinforcement ratios clearly enhance the seismic behavior, and high reinforced slabs (1.5% ratio on tensile and tensile face) exhibited less plastic deformability, less displacement and better energy dissipation. Seismic resistance added with the use of shear walls through reduced displacement and additional load carrying. Moreover, the use of high strength concrete led to higher displacement and more efficient energy dissipation, but also increased the brittleness of the slab. This research demonstrates the significance of both the configuration of reinforcement and the integration of shear walls to improve the seismic performance for flat slab systems, which will lead to more efficient design strategies for the earthquake-resisting buildings.