Simulation of Failure Localization and Buckling Behavior of Steel-tube Confined Concrete Columns using Coupled RBSM-Shell FEM Analysis

摘要

A coupled model is presented to simulate the failure localization of concrete and local buckling behavior of steel tube. The coupled model combines the three-dimensional Rigid Body Spring Model and the MITC shell FEM element to model concrete and steel tube, respectively, in a steel-tube confined concrete member. Simulation of published test experiments of concrete-filled steel tube confirmed the capability of the coupled RBSM-shell FEM model in simulating these behaviors.