Abstract
The application of concrete-filled stainless steel tubular (CFSST) columns has been increased rapidly in bridges and other infrastructure around the globe due to its greater corrosion resistance, fire resistance, and durability. This research has investigated the compressive behavior of CFSST columns both experimentally and numerically. An experimental program has been carried out with twenty-four (24) column specimens of six (6) different sizes and shapes with varying concrete strength. A 3D non-linear finite element model was developed to validate the experimental result. Besides, an extensive parametric study has been conducted to investigate the effect of geometric and material properties. It was observed that the numerical model can predict the experimental result and failure mode with very high accuracy. In general, the failure was occurred due to the outwards buckling of the steel tube. The ductility index decreased with increasing the compressive strength of concrete. The rectangular columns exhibited less ductility index than the square and circular columns. The increase in column axial capacity due to higher concrete strength was more significant for columns having a higher depth to thickness (D/t) ratio. Finally, the axial capacity of the columns was compared with the design standards.
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Acknowledgements
The authors would like to acknowledge MIST for providing the necessary funds required for the experimental program. They are also thankful to the laboratory assistants of the concrete laboratory and structural mechanics laboratory of MIST who helped in conducting tests during the experimental program. Special gratitude to Lecturer Md. Shahjalal, Department of Civil Engineering, MIST.
Funding
This work was supported by the Military Institute of Science and Technology (MIST).
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Hossain, G.A., Ahmed, K.F. & Rahman, S. Effect of Geometric and Material Properties on the Behavior of Axially Loaded Concrete-Filled Stainless Steel Tube Columns. Int J Steel Struct 22, 1215–1235 (2022). https://doi.org/10.1007/s13296-022-00631-0
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DOI: https://doi.org/10.1007/s13296-022-00631-0