Related Experiment Video
Updated: Jul 1, 2025

Finite Element Modeling for the Simulation of the Quasi-Static Compression of Corrugated Tapered Tubes
Published on: January 6, 2023
Structural performance of the concrete-filled tube column with internal triangular units subjected to axial
Jinwon Kim1, Se-Jung Lee2, Sang-Hyun Ji3
1Steel Solution Center, POSCO, Incheon, Republic of Korea.
Abstract:
This study introduces a novel concrete-filled tube (CFT) column system featuring a steel tube comprised of four internal triangular units. The incorporation of these internal triangular units serves to reduce the width-thickness ratio of the steel tube and augment the effective confinement area of the infilled concrete. This design enhancement is anticipated to result in improved structural strength and ductility, contributing to enhanced overall performance and sustainability. To assess the effectiveness of the newly proposed column system, a full-scale test was conducted on five square steel tube column specimens subjected to axial compression. Among these specimens, two adhered to the conventional steel tube column design, while the remaining three featured the new CFT columns with internal triangular units. The shape of the CFT column, the presence of infilled concrete and the presence of openings on the ITUs were considered as test parameters. The test results reveal that the ductility of the newly proposed CFT column system exhibited a minimum 30% improvement compared to the conventional CFT column. In addition, the initial stiffness and axial compressive strength of the new system were found to be comparable to those of the conventional CFT column.
More Related Videos
05:26Determination of the Mechanical Properties of Flexible Connectors for Use in Insulated Concrete Wall Panels
Published on: October 19, 2022
10:27A Uniaxial Compression Experiment with CO2-Bearing Coal Using a Visualized and Constant-Volume Gas-Solid Coupling Test System
Published on: June 12, 2019
Related Concept Videos
Behavior of Concrete Under Compressive Load
As the concrete specimen fractures under...
Design of Columns under a Centric Load
Euler's formula is applicable under the assumption that the column is a perfect, straight, homogenous prism, and it is operating...
Torsion of Noncircular Members
Stresses under Combined Loadings
The process begins by slicing the tube at critical points and analyzing the internal forces and stress components at these sections, focusing on the centroid. Normal stresses, generated by axial forces and bending moments, are either compressive or tensile and vary across the section from...
Design of Columns under an Eccentric Load
Relation between Poisson's ratio, Modulus of Elasticity and Modulus of Rigidity