Fire resistance of double-skinned composite tubular columns including concrete confinement

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• 作者：Deok Hee Won ; Taek Hee Han ; Seungjun Kim ; Young Jong Kang
• 关键词：DSCT ; Fire resistance ; Confining effect ; Column ; ISO ; 834 ; Inner tube
• 刊名：Materials and Structures
• 出版年：2016
• 出版时间：April 2016
• 年：2016
• 卷：49
• 期：4
• 页码：1269-1284
• 全文大小：4,214 KB
• 参考文献：1.Shakir-Khalil H, Illouli S (1987) Composite columns of concentric steel tubes. In: Proceeding of conference on the design and construction of non conventional structures, pp 73–82
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• 作者单位：Deok Hee Won (1)
  Taek Hee Han (1)
  Seungjun Kim (3)
  Young Jong Kang (4)
  
  1. Coastal and Environmental Engineering Division, Korea Institute of Ocean Science and Technology, Ansan, 426-744, Republic of Korea
  3. Marine Research Institute, Samsung Heavy Industries Co. Ltd, 217 Munjin-ro, Daejeon, 137-857, Republic of Korea
  4. Department of Architectural, Civil and Environmental Engineering, Korea University, 145 Anamro, Seoul, 156-701, Republic of Korea
  
• 刊物类别：Engineering
• 刊物主题：Structural Mechanics
  Theoretical and Applied Mechanics
  Mechanical Engineering
  Operating Procedures and Materials Treatment
  Civil Engineering
  Building Materials
  
• 出版者：Springer Netherlands
• ISSN：1871-6873

文摘

Double-skinned composite tubular (DSCT) columns consisting of concrete cast between outer and inner tubes have been developed to overcome certain limitations of other columns, such as the large self-weight of concrete-filled tubular columns and lack of concrete confinement of hollow concrete-filled tubular columns. The strength and ductility of the column are enhanced by the continuous confining stress provided by the inner tube. Their excellent structural performances make them particularly suitable for applications in high-rise buildings. However, if a high-rise building is damaged by fire, the economic costs associated with building repair can be high. It is very important to put the fire-damaged building back into service with the minimum post-fire repair. Thus, to predict the status of a structure under fire, its behavior should be evaluated based on the fire duration. Studies on the fire resistance of DSCT columns have been carried out for this purpose. However, they have involved the performance of the entire system without considering the effects of the DSCT column’s components on the fire resistance. In this paper, the behavior of a DSCT column is investigated under an ISO-834 standard fire using an analytical method. The evaluation method for the fire resistance of a DSCT column utilizes a thermal analysis and Eurocode. In addition, the relationship between the DSCT column’s components and the fire resistance is investigated, considering the confining effect. Moreover, the behavior of the DSCT column is evaluated through parametric studies of the hollow ratio, thickness of the outer tube, and thickness of the inner tube.