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[1]崔铁军,马云东.均匀火灾温场下隧道管片受力分析[J].中国安全生产科学技术,2014,10(5):37-42.[doi:10.11731/j.issn.1673-193x.2014.05.006]
 CUI Tiejun,MA Yundong.Internal forces analysis for tunnel segment under fire based on the coupled fluidmechanical-thermal model in uniform temperature field[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2014,10(5):37-42.[doi:10.11731/j.issn.1673-193x.2014.05.006]
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均匀火灾温场下隧道管片受力分析
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
10
期数:
2014年5期
页码:
37-42
栏目:
学术论著
出版日期:
2014-05-31

文章信息/Info

Title:
Internal forces analysis for tunnel segment under fire based on the coupled fluidmechanical-thermal model in uniform temperature field
文章编号:
20140506
作者:
崔铁军12 马云东2
(1. 辽宁工程技术大学, 安全科学与工程学院,辽宁 阜新 123000;
2. 大连交通大学, 辽宁省隧道与地下结构工程技术研究中心, 辽宁 大连 116028)
Author(s):
CUI Tiejun12 MA Yundong2
(1. College of Safety Science and Engineering, Liaoning Technical University, Fuxin Liaoning 123000, China;
 2. Tunnel & Underground Structure Engineering Center of Liaoning, Dalian Jiaotong University, Dalian Liaoning 116028, China)
关键词:
隧道火灾均匀温场管片受力FLAC3D流固热耦合模型
Keywords:
tunnel fire uniform temperature field segment force FLAC3D fluidmechanicalthermal coupling model
分类号:
X936
DOI:
10.11731/j.issn.1673-193x.2014.05.006
文献标志码:
A
摘要:
对于以盾构方式修建的地铁,其隧道管片是主要的受力构件。在以热辐射为主的火灾中,会形成比较均匀的温度场。由于管片受热均匀,整周管片内部将产生均匀的热力荷载,加之地应力荷载使其应力分布更为复杂。使用FLAC3D模拟在以热辐射为主的火灾中,管片应力分布和变化特征。根据温度不同材料性质不同的客观事实,在模拟过程中随温度升高实时调整材料参数,使模拟结果更加准确。分析结果表明:最大水平压力上升比较快,1000℃时其比最大竖向压力大30%。最大值的位置分别对称于经过隧道轴线的水平和竖直面。总位移在400℃后明显增加,最大位移一般在隧道左右两侧。
Abstract:
The tunnel segment of the shield construction subway is the main bearing structure. In the fire with the thermal radiation primarily, the formed temperature field is relatively uniform field. In this field, the circle segments will produce uniform thermal load, as well as the ground stress load, which make the stress distribution more complex. According to tunnel construction practice, in the uniform temperature field with linear increase process of temperature, FLAC3D was used to simulate the stress distribution and deformation characteristics of the segment. According to the fact that material properties were different in the different temperature, the parameters were adjusted realtimely, in the simulation process with temperature rising, so that the simulation results could be more accurate. The results showed that: the maximum horizontal pressure rises faster, it is larger than the largest vertical pressure 30% in 1000℃. The location of the maximum is symmetry of surfaces that across respectively horizontal and vertical axis. In 400℃, total displacement significantly increases, and the maximal displacements are in both sides of tunnel commonly.

参考文献/References:

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备注/Memo

备注/Memo:
国家自然科学基金项目(51050003); 辽宁省高校优秀人才支持计划项目(2009R07); 辽宁省科技计划项目(201202022)
更新日期/Last Update: 2014-05-31