Finite Element Modelling of Concrete-Encased Steel Columns Under Axial Compression

Concrete-encased steel (CES) composite columns are used extensively throughout the world due to their high strength, stiffness, ease of construction, and other benefits. Hence, this research focuses on analysis behaviour for CES composite columns under axial compression load. Test results of both high-strength concrete and steel were obtained for the simulation tests. The performance of the CES column is evaluated and analysed using a 3D finite element (FE) model. The influence of fibre fractions and transverse reinforcements on load-carrying capacity is mentioned in the study. The results show a significant improvement in axial compression by the difference in concrete strength, transverse reinforcement spacing, or steel fibre volume. Finally, the accuracy of the proposed model will be verified through force–strain curves.