Abstract
This paper aims to provide a unified approach of the finite element analysis (FEA) modelling technique in validating experimental work related to progressive collapse study using ABAQUS software version 6.14. The Finite Element Model (FEM) in simulating the experimental study on the dynamic response of a flush end-plate connection under the effect of sudden support (column) removal is shown herein. The double-span beam and the end plate were modelled using the first-order shell element with reduced integration (S4R). The plastic hinge meshing scheme was utilized on the double-span beam geometry with finer mesh modelled for part of the beam with higher bending behavior and vice versa. A simplified modelling approach for the modelling of the flush endplate connection was introduced. The endplate, which was welded to the cross-section of the beam, was idealized via tie-constraint interaction. A translator-type connector element was used to represent the bolt behavior and the Coulomb friction model was enforced for the surface interaction between the endplate and the column flange. The Holzier material model was used to define the nonlinear properties of the hot-rolled steel sections. The nonlinear Dynamic, Explicit analysis procedure was adapted in simulating the loading scheme given in the experiment and the Rayleigh model was enforced in the analysis to introduce the effect of damping. The analysis output was successfully verified against the experimental results from previous research. It was concluded that the simplified FEA modelling method proposed in this work can simulate actual dynamic response of the flush-end connection. The proposed alternative finite element model able to predict the maximum dynamic displacement of the double-span beam with 0.83% error.