Experimental study on local buckling of fire-resisting steel columns under fire load

✍ Scribed by Kuo-Chen Yang; Sheng-Jin Chen; Cun-Ci Lin; Hung-Hsin Lee

• Publisher: Elsevier Science
• Year: 2005
• Tongue: English
• Weight: 858 KB
• Volume: 61
• Category: Article
• ISSN: 0143-974X
• DOI: 10.1016/j.jcsr.2004.07.001

✦ Synopsis

The structural behavior of stub columns using fire-resistant steel has been investigated experimentally under uniform fire load. The newly-developed fire-resistant steel is proven to have higher strength at elevated temperature than that of conventional steel. Also, the requirement of fireprotection in the fire-resisting steel can be released or relaxed as compared with conventional steel structures. However, the design criteria for the application of the fire-resisting steel in steel columns are still limited. To examine the structural behavior of this type of steel columns under fire load, a total of 24 stub column specimens, including both box columns and H columns, reached their limit states due to axial load under fire condition. The main purpose of these studies is to evaluate the variations of the ultimate strength of steel columns due to different width-to-thickness ratios under specified elevated temperature; in addition, to investigate the reduction effects on column strength resulting in the increasing temperature; and finally, to establish the design guidelines of steel columns using fire-resisting steel. From the experimental results, it is found that the ultimate loads of the stub * Corresponding author.