Fire Resistance Study of Concrete in the Application of Tunnel-like Structures☆
Fire Resistance Study of Concrete in the Application of Tunnel-like Structures☆
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DOI：
10.1016/j.proeng.2016.11.531
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
X. Long;Hongcun Guo
中科院分区：
文献类型：
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作者：
X. Long;Hongcun Guo
对于水下悬浮隧道等空间受限的水下结构物来说，火灾是一个不可避免的关键问题。在现有的设计中，混凝土已被广泛用于增加强度或作为压载物的功能，以稳定由于水动力荷载，如波浪和水流的结构。然而，值得注意的是，混凝土具有保护结构免受火灾的优点，尽管仍有许多技术和科学问题需要解决。本文研究了混凝土在火灾高温下的力学性能。随后，进行数值模拟，以获得定量的结果，在隧道状结构的应用。特别是，一些结构参数的耐火性能进行了研究，即，混凝土抗压强度、钢筋屈服强度和钢管混凝土柱长度。讨论了这些参数对SFT在RABT火灾曲线下的耐火时间的影响，以说明在合理范围内优化这些参数的重要性。
For submerged floating tunnels and other underwater structures with a confine space, fire is an unavoidable and critical issue. In the existing designs, concrete has been widely employed to increase the strength or function as ballast to stabilize the structures due to hydrodynamic loadings, such as wave and current. Nevertheless, it is noteworthy that concrete owns its merits to protect structures from fire, even though there are still a number of technical and scientific problems to tackle. In this paper, the mechanical behaviour of concrete is studied under high temperature in fire. Later, numerical simulations are performed so as to attain quantitative results in applications of tunnel-like structures. Particularly, some structural parameters are investigated in terms of fire resistance, i.e., compressive strength of concrete, yield strength of steel and the length of SFT. The effects of these parameters on the fire resistance time of SFT that were exposed to an RABT fire curve are discussed to illustrate the importance to optimize the values within a reasonable range.