Refined three-dimensional finite element model for end-plate connection

Abstract

A finite element methodology is employed in the investigation of the behavioral characteristics of the end-plate connections. In order for the actual behavior to be simulated correctly and effectively, a three-dimensional (3D) model is established with nonconforming 3D elements. The elastoplastic nonconforming solid elements with variable nodes are used for the effective and economic 3D finite element modeling and analysis. The effect of bolt pretensioning and the shapes of the bolt shank, head, and nut are taken into consideration in the modeling. A simple yet efficient contact algorithm with a new gap element is employed to simulate the interaction between the end plate and column flange. The prototype end-plate connection is analyzed with the refined 3D finite element model and is verified by comparison with results from one particular test.