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| Vol. - No. | Vol.13 - No.1 |
|---|---|
| Date | Mar., 2024 |
| Title |
Fire Behavior of Reinforced Concrete Filled Square Steel Tube Columns Under Constant Axial Loads |
| Author | Jeeyoung Lee1, Seulgi Han2, Jinwon Shin3, Inrak Choi4, and Sungmo Choi2+ |
| Institutions |
1Department of Architectural Engineering, Urban Sciences of the University of Seoul, Korea 2Department of Architectural Engineering, University of Seoul, Korea 3Department of Architectural Engineering, Catholic Kwandong University, Korea 4Department of Civil Engineering, Hoseo University, Korea |
| 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. |
| Keyword |
Reinforced Concrete-Filled Steel Tube, Heat Transfer Analysis, Stress Analysis, Compressive and Flexural Strength, Fire Resistance Performance |
| PP. | PP.85~95 |
| Paper File |
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