International Journal of High-Rise Buildings (국제초고층학회논문집)

Council on Tall Building and Urban Habitat Korea (한국초고층도시건축학회)
권호 표지
DOI QR코드

DOI QR Code

Fire Behavior of Reinforced Concrete Filled Square Steel Tube Columns Under Constant Axial Loads

  • Jeeyoung Lee (Department of Architectural Engineering, Urban Sciences of the University of Seoul) ;
  • Seulgi Han (Department of Architectural Engineering, University of Seoul) ;
  • Jinwon Shin (Department of Architectural Engineering, Catholic Kwandong University) ;
  • Inrak Choi (Department of Civil Engineering, Hoseo University) ;
  • Sungmo Choi (Department of Architectural Engineering, University of Seoul)
  • Published : 2024.03.27
Download PDF
⟨ Previous Next ⟩

Abstract

A composite member made of concrete-filled steel tubes (CFT columns) has been recognized for its fire resistance due to the thermal mass effect of concrete inside the steel tube, as shown in various studies. In this study, the fire resistance performance of reinforced CFT columns under constant axial load was evaluated using finite element analysis with ABAQUS. For this purpose, the variables including cross-section size, steel tube thickness, and concrete cover thickness were set, and the temperature distribution in the column cross-section exposed to a standard fire was investigated using heat transfer analysis. Ultimately, a P-M interaction curve was obtained by evaluating the overall residual strength of columns, and the fire resistance time was determined by evaluating axial displacement-time responses due to the reduction in load capacity during fire through stress analysis.

Keywords

Acknowledgement

A short section may acknowledge assistance and sources of financial support.

References

  1. Choi, I. R. (2020). "High-Temperature Thermal Properties of Sprayed and Infill-Type Fire-Resistant Materials Used in Steel-Tube Columns." International Journal of Steel Structures, Vol.20, No.3, 777-787 
  2. Cho, K. S. (2011). "An Experimental Study on the Fire Resistance Performance of the Reinforced Concrete Columns According to the Cross Section Size and Depth of Concrete Cover." Journal of Korean Institute of Fire Sci & Eng., Vol.25, No.1, 78-84. 
  3. EN 1991-1-2 (2002). "Eurocode 1: Actions on Structures - Part 1-2: General Actions - Actions on Structures Exposed to Fire." European Committee for Standardization. 
  4. EN 1993-1-2 (2015). "Eurocode 3: Design of Steel Structures - Part 1-2: General Rules - Structural Fire Design." European Committee for Standardization. 
  5. EN 1994-1-2 (2005). "Eurocode 4: Design of Composite Steel and Concrete Structures - Part 1-2: General Rules - Structural Fire Design." European Committee for Standardization. 
  6. Espinos, A. Et al. (2010). "Advanced model for predicting the fire response of concrete filled tubular columns." Journal of Constructional Steel Research, 66(8), 1030-1046. 
  7. Han, S. G. Et al. (2022). "Evaluation of Fire Resistance of Concrete Filled Steel Tube Column by Spray-Applied Fire Resistive Material and CFRP Re-Bar Internal Arrangement." Journal of the Korean Society for Advanced Composite Structures, Vol.13, No.5, 37-47. 
  8. Han, S. G. Et al. (2023). "Flexural Performance of Concrete-Filled Composite Beams with Carbon Fiber-Reinforced Plastic Rebar Exposed to Standard Fires." Journal of the Korean Society for Advanced Composite Structures, Vol.14, No.1, 17-27. 
  9. Han, S. G. Et al. (2023). "Compressive and Flexural Performance of Concrete Columns Reinforced with Steel/ CFRP Re-bars Exposed to 3 Hours Standard Fire." Journal of the Korean Society for Advanced Composite Structures, Vol.14, No.3, 1-12. 
  10. Hong, S., and Varma, A. H. (2009). "Analytical modeling of the standard fire behavior of loaded CFT columns." Journal of Constructional Steel Research, Vol.65, No.1, 54-69. 
  11. Kim, S. H. (2012). "A Study on the Evaluation of Residual Strength of Double Concrete Filled Tube Column by Unstressed test." Journal of Korean Society of Steel Construction, Vol.24, No.1, 88-89. 
  12. Kim, S. H. (2014). "Improving Structural and Fire Performance with Steel-Fibers for Internally Anchored Square Composite Columns." Doctoral Dissertation, Department of Architectural Engineering, University of Seoul, Seoul, Korea. 
  13. Kim, S. H., and Yom, K. S. (2017). "Evaluation of Resistance Strength and Behavior of Reinforced STG 800 Welded Square Composite Column after Fire 3 Hour." 2021 Proceedings of the Korean Institute of Building Construction Conference, Seoul, Korea, 242-243. 
  14. KS F 2257-1 (2019). "Methods Fire Resistance Test for Elements of Building Construction-General Requirements." Korean Agency for Technology and Standards (KS), Seoul, Korea. 
  15. KS F 2257-7 (2019). "Methods of Fire Resistance Test for Elements of Building Construction- Specific Requirements for Columns." Korean Agency for Technology and Standards (KS), Seoul, Korea. 
  16. Lee, C. R. (2021). "A Study on Mathematical Evaluation of the Fire Resistance Performance for Reinforced Concrete Filled Steel Tube Columns." Master Thesis, Department of Architectural Engineering, Urban Sciences of the University of Seoul, Seoul, Korea. 
  17. Lee, J. Y. (2023). "Compressive and Flexural Strength of Reinforced Concrete Filled Square Steel Tube Columns Exposed to Standard Fire." Master Thesis, Department of Architectural Engineering, Urban Sciences of the University of Seoul, Seoul, Korea. 
  18. Park, S. H. Et al. (2007). "An Evaluation for the Fire Resistance of Concrete-Filled Steel Square Tube Columns under Constant Axial Loads." Journal of Korean Society of Steel Construction, Vol.19, No.6, 703-714. 
  19. Song, K. C. (2010). "A Study on the Evaluation Fire-resistance Capacities for Advanced Square CFT Columns." Master Thesis, Department of Architectural Engineering, University of Seoul, Seoul, Korea. 
  20. Wang, Y. C. (2005). "Steel and Composite Structures Behavior and design for fire safety." Taylor & Francis Group.d