Iterative Finite Element Analysis of Concrete-Filled Steel Tube Columns Subjected to Axial Compression

Since laboratory tests are usually costly, simulating methods using computers always under the spotlight. This study performed a finite element analysis (FEA) iterative solutions for circular and square concrete-filled steel tube (CFST) columns infilled with high-strength concrete reinforced cross-shaped plate (comprising two plates along that divide hollow into four equal sections) without opening. For this reason validation purposes, had length of 900 mm, width/diameter 150 mm wall thickness 3 mm. In study, unlike in some other studies, was assumed to be fixed at top bottom column, were subjected axial compression pointed center. The outcomes revealed could improve strength both CFST columns; however, structural performance changed: local outward buckling observed after inserting plate. By an opening on plate, bearing capacity further improved, while experienced decline their ultimate compared corresponding models lateral deflection also improved by adding reinforcement. However, columns, it initially increasing inversely influenced columns. results available codes, good agreement achieved those outcomes.