Investigation into the behavior of a upgraded section used for Concrete-Filled Steel tubular Columns (Upgraded CFT) Under Cyclic Loading

Document Type : Original Article

Authors

1 Ph. D. Candidate, Department of Civil engineering, Tabriz Branch, Islamic Azad University, Tabriz, Iran

2 Assistant Professor, Department of Civil engineering, Tabriz Branch, Islamic Azad University, Tabriz, Iran.

3 Assistant Professor, Department of Civil engineering, Tabriz Branch, Islamic Azad University, Tabriz, Iran

Abstract

Numerous advantages of concrete-filled steel tubular (CFST) columns have led to the widespread of such column sections in highly important specific structures such as high-rise buildings, piers, and bridges in recent years. The major drawback of CFST columns is the uncoated steel tube, causing the loss of concrete confinement and sudden strength decline against external loads exerted on the steel tube such as impact, explosion, fire, and so on due to the weakness of it. A novel upgraded section designed and introduced using the internal steel mesh, acting as a double-skin tube along with the external steel tube to prevent the destruction of the concrete core and sudden decline of column load-bearing capacity by the internal steel mesh when the external steel tube was destructed. The columns with the newly designed section and those with the conventional section were tested under axial and seismic loads. The experimental results were validated by the results of the nonlinear finite element analysis of the columns. Other columns were modelled using different internal steel meshes, and the results were compared. In the novel section proposed for the CFST columns, concrete core confinement was improved by the internal steel mesh, leading to an increase in the load-bearing capacity and progressive collapse duration of CFST columns against sudden loads such as impact and fire. The results of the research confirm a significant increase in the strength and ductility of the upgraded sections compared to the usual sections.

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References

[1] Abedi, K., Ferdousi, A. and Afshin, H. (2008). A novel steel section for concrete-filled tubular columns. Thin-Walled Structures, 46, 310-319.
[2] Hsiao, P., Hayashi, K., Nishi, P., Lin, X. and Nakashima, M. (2015). Investigation of Concrete-Filled Double-Skin Steel Tubular Columns with Ultrahigh-Strength Steel. Journal of Structural Engineering, 141, 1-8.
[3] Wang, R., Han, L., Zhao, X. and Rasmussen, K. (2016). Analytical behavior of concrete filled double steel tubular (CFDST) members under lateral impact. Thin-Walled Structures, 101, 129-140.
[4] Aghdamy, S., Thambiratnam, D., Dhanasekar, M. and Saiedi, S. (2017). Effects of load-related parameters on the response of concrete-filled double-skin steel tube columns subjected to lateral impact. Journal of Constructional Steel Research, 138, 642-662.
[5] Zhou, F. and Xu, W. (2016). Cyclic loading tests on concrete-filled double-skin (SHS outer and CHS inner) stainless steel tubular beam-columns. Engineering Structures, 127, 304-318.
[6] Hassaneina , F., Elchalakanib, M., Karrechb, A., Patelc, V. and Daher, E. (2018). Finite element modelling of concrete-filled double-skin short compression members with CHS outer and SHS inner tubes. Marine Structures, 61, 85-99.
[7] Vernardos, S. and Gantes, Ch. (2019). Experimental behavior of concrete-filled double-skin steel tubular (CFDST) stub members under axial compression: A comparative review. Structures, 22, 383-404.
[8] Zheng, Y., He, Ch. and Zheng, L. (2018). Experimental and numerical investigation of circular double-tube concretefilled stainless steel tubular columns under cyclic loading. Thin-Walled Structures, 132, 151-166.
[9] Chen, J., Chan, T.M., Kai Leung Su, R. and Miguel Castro, J. (2019). Experimental assessment of the cyclic behaviour of concrete-filled steel tubular beam-columns with octagonal sections. Engineering Structures, 180, 544-560.
[10] Wang, B., Liang, J. and Lu, Zh. (2019). Experimental investigation on seismic behavior of square CFT columns with different shear stud layout. Journal of Constructional Steel Research, 153, 130-138.
[11] Zhang, J., Li, X., Cao, W. and Yu, Ch. (2019). Cyclic behavior of steel tube-reinforced high-strength concrete composite columns with high-strength steel bars. Engineering Structures, 189, 565-579.
[12] Wang, Z., Zhang, J., Li, W. and Wu, H. (2020). Seismic performance of stiffened concrete-filled double skin steel tubes. Journal of Constructional Steel Research, 169, 1-19.
[13] ANSYS, ANSYS User’s Manual Revision 12.0, ANSYS, Inc.
[14] ATC-24, Guideline for Cyclic Seismic Testing of Components of Steel Structures.
 
Journal of Structural and Construction Engineering
Volume 9, Issue 7 - Serial Number 60
October 2022
Pages 86-100

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History

  • Receive Date: 14 October 2021
  • Revise Date: 26 November 2021
  • Accept Date: 24 December 2021

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