Finite element modelling and parametric studies of semi-closed thin-walled steel polygonal columns

Abstract

Objective of this work is to study the proposed structural sections in design situation and to investigate possible design models. The expected structural behavior of the column is a mixture between the open and closed cross-section. These cases will be investigated through numerical study. In this thesis presented a comprehensive parametric study on the ultimate strength of proposed coldformed steel columns using the Finite Element package ABAQUS. FE models were first developer for columns by using automation that was made through MATLAB and Python script. The buckling and non-linear FE study was done for the investigation of local (L), distortional (D) and global (G) possible buckling failures and ultimate resistance, respectively. Modelling issues such as boundary conditions, meshing, initial imperfections, material models, and non-linear solution controls in FEA were also addressed.

Objective of this work is to study the proposed structural sections in design situation and to investigate possible design models. The expected structural behavior of the column is a mixture between the open and closed cross-section. These cases will be investigated through numerical study. In this thesis presented a comprehensive parametric study on the ultimate strength of proposed coldformed steel columns using the Finite Element package ABAQUS. FE models were first developer for columns by using automation that was made through MATLAB and Python script. The buckling and non-linear FE study was done for the investigation of local (L), distortional (D) and global (G) possible buckling failures and ultimate resistance, respectively. Modelling issues such as boundary conditions, meshing, initial imperfections, material models, and non-linear solution controls in FEA were also addressed.