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Fire Resistance of Axially and Rotationally Restrained Concrete-Filled Double-Skin and Double-Tube Hollow Steel Columns
| 题名： | Fire Resistance of Axially and Rotationally Restrained Concrete-Filled Double-Skin and Double-Tube Hollow Steel Columns |
| 正文语种： | 英文 |
| 作者： | Aline L. Camargo1; Joao Paulo C. Rodrigues2; Ricardo H. Fakury3; Luis Laim4 |
| 作者单位： | 1Ph.D. Candidate, Dept. of Structural Engineering, Federal Univ. of Minas Gerais, Av. Pres. Ant?nio Carlos, 6627, Pampulha, Belo Horizonte 31270-901, Brazil. 2Professor, Associated Laboratory for Energy, Transports and Aeronautics, Dept. of Civil Engineering, Univ. of Coimbra, Rua Luis Reis Santos, Coimbra 3030-788, Portugal (corresponding author). 3Professor, Dept. of Structural Engineering, Federal Univ. of Minas Gerais, Av. Pres. Ant?nio Carlos, 6627, Pampulha, Belo Horizonte 31270-901, Brazil. 4Postdoctroal Researcher, Dept. of Civil Engineering, Univ. of Coimbra, Rua Luis Reis Santos, Coimbra 3030-788, Portugal. |
| 关键词： | Fire; Double-skin; Double-tube; Composite; Steel; Concrete; Column |
| 摘要： | The use of concrete-filled hollow steel columns is increasing in construction. These columns with a high load-bearing capacity allow the use of smaller cross sections. However, the use of slender elements in buildings makes necessary new construction solutions that ensure the required performance in case of fire. This paper presents the results of experimental research on the performance of thermal restrained concrete-filled double-skin and double-tube hollow steel columns subjected to fire. The influence of several parameters on the behavior of these columns in the case of fire was tested, such as the type of concrete infill (normal, high-strength, and light-weight concrete), loading level, and axial and rotational restraint level. This type of column has two concentric tubes in which the outer tube has a diameter twice that of the inner tube. The double-tube columns were completely filled with concrete; the double-skin columns had concrete only between the tubes, and the inner tube was empty. The results of this research show that the loading level had a large effect on the reduction of the fire resistance (critical time) of the tested columns. However, the type of concrete and the thermal restraint level had a minor effect. The double-tube columns did not have much better fire performance compared with the double-skin tubes. |
| 出版年： | 2019 |
| 期刊名称： | Journal of Structural Engineering |
| 卷： | 145 |
| 期： | 11 |
| 页码： | 1-12 |
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