当前位置:主页 > 科技论文 > 交通工程论文 >

非均匀受火隧道衬砌结构抗火性能研究

发布时间:2018-05-15 08:24

  本文选题:非均匀受火 + 衬砌结构 ; 参考:《苏州科技学院》2014年硕士论文


【摘要】:近年来,随着我国经济的不断发展,隧道的应用日益广泛,隧道火灾时有发生。火灾高温在不同程度上对隧道衬砌结构造成了损伤,降低了衬砌结构的安全性。由于隧道是一个狭长的结构,纵向温度分布不均匀,引起隧道衬砌结构内力重分布,且衬砌管片之间沿纵向存在显著的约束作用。因此,研究非均匀受火条件下隧道衬砌结构抗火性能具有重要的实用价值。 本文利用有限元软件ABAQUS,建立了隧道衬砌结构三维有限元模型,通过数值模拟,得到了衬砌位移、内力随受火时间的变化规律及结构的耐火极限。主要内容如下: 1.在分析和总结国内外研究成果的基础上,选择了高温下材料的热工性能和热力学模型。 2.采用有限元ABAQUS软件,,建立隧道衬砌结构的三维分析模型,应用试验数据对温度场和力学计算结果进行了验证。 3.利用验证后的模型分析了隧道衬砌结构在纵向温度非均匀分布下的反应。 4.研究了纵向约束、火灾峰值温度、升温速率、地面超载、侧压力系数、钢筋强度等级与混凝土强度等级对隧道衬砌结构变形、内力的影响。 5.对比了三种耐火极限判定标准,利用温度控制准则对耐火极限进行了参数分析。
[Abstract]:In recent years, with the development of economy in China, tunnel fire occurs frequently. The high temperature of fire causes damage to tunnel lining structure and reduces the safety of tunnel lining structure. Because the tunnel is a long and narrow structure and the longitudinal temperature distribution is not uniform, the internal force of the tunnel lining structure is redistributed, and there is a significant constraint effect between the lining segments along the longitudinal direction. Therefore, it is of great practical value to study the fire resistance of tunnel lining under non-uniform fire conditions. In this paper, a three-dimensional finite element model of tunnel lining structure is established by using the finite element software Abaqus. Through numerical simulation, the variation law of lining displacement and internal force with fire time and the fire resistance limit of the structure are obtained. The main contents are as follows: 1. On the basis of analyzing and summarizing the research results at home and abroad, the thermal properties and thermodynamic models of materials at high temperature were selected. 2. The three-dimensional analysis model of tunnel lining structure is established by using finite element ABAQUS software. The results of temperature field and mechanical calculation are verified by test data. 3. The response of tunnel lining structure under non-uniform distribution of longitudinal temperature is analyzed by using the verified model. 4. The effects of longitudinal restraint, fire peak temperature, heating rate, ground overload, lateral pressure coefficient, strength grade of reinforcement and strength of concrete on deformation and internal force of tunnel lining are studied. 5. In this paper, three kinds of fire resistance criteria are compared, and the parameters of fire resistance limit are analyzed by using temperature control criterion.
【学位授予单位】:苏州科技学院
【学位级别】:硕士
【学位授予年份】:2014
【分类号】:U458;U451.4

【参考文献】

相关期刊论文 前8条

1 王明年,杨其新,袁雪戡,杨忠;公路隧道火灾温度场的分布规律研究[J];地下空间;2003年03期

2 闫治国;朱合华;彭芳乐;;隧道火灾场景设计及衬砌结构防火研究[J];地下空间与工程学报;2006年S2期

3 闫治国;朱合华;;隧道衬砌结构火灾安全及高温力学行为研究[J];地下空间与工程学报;2010年04期

4 常岐;闫治国;朱合华;郭锐;;火灾下隧道衬砌结构力学行为的热力耦合分析[J];地下空间与工程学报;2010年S1期

5 戴国平;英法海峡隧道火灾事故剖析及其启示[J];铁道建筑;2001年03期

6 闫治国;朱合华;梁利;;火灾高温下隧道衬砌管片力学性能试验[J];同济大学学报(自然科学版);2012年06期

7 戴国平,田沛哲,夏永旭;二郎山公路隧道火灾通风对策[J];长安大学学报(自然科学版);2002年06期

8 陈维;英国建筑材料和构件的燃烧试验标准(BS476)[J];消防技术与产品信息;1995年02期



本文编号:1891709

资料下载
论文发表

本文链接:https://www.wllwen.com/kejilunwen/jiaotonggongchenglunwen/1891709.html


Copyright(c)文论论文网All Rights Reserved | 网站地图 |

版权申明:资料由用户901ce***提供,本站仅收录摘要或目录,作者需要删除请E-mail邮箱bigeng88@qq.com