主管：中华人民共和国应急管理部
主办：应急管理部天津消防研究所
ISSN 1009-0029  CN 12-1311/TU
消防科学与技术

消防科学与技术 ›› 2023, Vol. 42 ›› Issue (11): 1543-1548.

• • 上一篇    下一篇

防火涂料局部损伤的牛腿-衬砌结构温度场有限元分析

王洁1,2,3, 聂锦涛1, 姜学鹏1,2,3, 许奇琦1   

  1. （1. 武汉科技大学 资源与环境工程学院，湖北 武汉 430081；2. 武汉科技大学 安全与应急研究院，湖北 武汉 430081；3. 武汉科技大学 消防安全研究中心，湖北 武汉 430081）
  • 出版日期:2023-11-15 发布日期:2023-11-15
  • 作者简介:王 洁（1987- ），女，江苏徐州人，武汉科技大学资源与环境工程学院副教授，硕士生导师，主要从事特殊空间火灾动力学、特殊空间火灾防控关键技术研究，湖北省武汉市和平大道973号武汉科技大学（青山校区），430081。
  • 基金资助:
    国家自然科学基金资助（51874213）；湖北省重点研发计划（2020BCB072）

Finite element analysis of temperature field of bullock ⁃lining structure locally damaged by fireproof paint

Wang Jie1,2,3, Nie Jintao1, Jiang Xuepeng1,2,3, Xu Qiqi1   

  1. (1. School of Resources and Environmental Engineering, Wuhan University of Science and Technology, Hubei Wuhan 430081, China; 2. Research Center of Fire Safety, Wuhan University of Science and Technology, Hubei Wuhan 430081, China;3. Institute of Safety and Emergency, Wuhan University of Science and Technology, Hubei Wuhan 430081, China)
  • Online:2023-11-15 Published:2023-11-15

摘要： 为研究防火涂料局部损伤的牛腿-衬砌构件在高温后的性能，采用ABAQUS软件建立三面受火的牛腿-衬砌构件仿真模型，分析高温后不同涂料热工参数和局部损伤下构件的温度场，基于模拟结果建立了考虑温度变化段长度和影响高度的计算模型，为同类型构件的抗火设计提供参考。分析结果显示：对于较为常见的隧道防火涂料，涂料越厚，牛腿底面温度越低；涂料导热系数越大，牛腿底面温度越高；涂料的比热容和密度对温度场基本没有影响。牛腿底面防火涂料局部脱落长度越大，温度变化段的长度越小，影响高度越大。牛腿底面防火涂料局部剥离厚度越大，温度变化段长度越大，影响高度越大。牛腿-衬砌连接缝处涂料局部损伤对温度变化段长度和影响高度的变化基本无影响，温度变化段的长度大致为74 mm，影响高度大致为43 mm。

关键词: 防火涂料, 局部损伤, 牛腿-衬砌结构, 高温, 温度场, 有限元, 脱落, 剥离

Abstract: In order to study the performance of the bull?lining component with local damage caused by fireproof coatings at high temperature, a simulation model of the bull-lining component with three sides of fire was established by ABAQUS software, and the thermal parameters of different coatings and the temperature field of the component under local damage after high temperature were analyzed. Based on the simulation results, a calculation model considering the length and height of the temperature changing section is established to providing references for the fire resistance design of the same type of component. The results show that the higher the thickness of the coating, the lower the temperature of the underside of the bull leg. The higher the thermal conductivity of the coating, the higher the temperature of the underside of the bull leg. The specific heat capacity and density of the coating have no effect on the temperature field. The larger the local shedding length of the bottom of the bull leg, the smaller the length of the temperature change section, and the greater the influence height. The greater the local peel thickness of the bottom of the bull leg, the greater the length of the temperature change section and the greater the influence height. The local damage of the paint on the joint of the bullock and lining has no effect on the length of the temperature change section and the influence height. The temperature change section is about 74 mm, and the influence height is about 43 mm.

Key words: fireproof paint, local injury, bull-lining structure, high temperature, temperature field, finite element analysis, falling off, stripping