Finite Element Analysis of Shearhead Connections Between Flat-Slab and CFT Column

This study is dedicated to developing a numerical model simulating the punching shear behavior of shearhead connections between Concrete-Filled Steel Tabular (CFT) columns and Reinforced Concrete (RC) flat-slab. A three-dimensional Finite Element Analysis (FEA) model is developed using ABAQUS, which incorporates the fundamental Concrete Damage Plasticity (CDP) model for concrete and the isotropic plasticity model for steel. The simulation outcomes are validated with experimental results and it is shown that the numerical model can provide acceptable results of load-displacement relations and failure modes of structural components. Parametric studies are also conducted to investigate the influence of mesh size, element types, parameters of CDP, and constitutive relations of concrete on the simulation results.