Applcation of generalized plasticity model in square CFT column analysis

Abstract

In the paper, an efficient three-dimensional concentrated plasticity nonlinear beam-column element is used for the simulation of the response of square CFT columns. The element adopts the concept of the generalized plasticity material model for the section resultant - element deformation relation and has plastic hinges located at the ends of the element and described with yield and limit surfaces. Determination of the adequate element parameters which are essential for a successful description of the CFT member behavior is discussed. Among these parameters, most important are the stiffness and yield surface parameters.