Experimental Research on Temperature Field of Full⁃scale Steel Frame Building during Firefighting by Water Spraying

Yang XU; Zhensen SONG; Jincheng ZHAO; Ying HUA; Shipeng RUAN

doi:10.13409/j.cnki.jdpme.202102020

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Experimental Research on Temperature Field of Full⁃scale Steel Frame Building during Firefighting by Water Spraying

更新时间：2025-09-25

- Experimental Research on Temperature Field of Full⁃scale Steel Frame Building during Firefighting by Water Spraying
- Journal of Disaster Prevention and Mitigation Engineering Vol. 41, Issue 4, Pages: 813-822(2021)
- 作者机构：
  
  1.上海交通大学船舶海洋与建筑工程学院，上海 200240
  2.上海市公共建筑和基础设施数字化运维重点实验室，上海 200240
- 作者简介：
- 基金信息：
- DOI：10.13409/j.cnki.jdpme.202102020
  CLC： TU998.1
- Received：20 February 2021，
  
  Revised：2021-04-12，
  
  Published：15 August 2021
- 稿件说明：
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徐阳,宋振森,赵金城等.喷水灭火过程中足尺钢框架房屋温度场试验研究[J].防灾减灾工程学报,2021,41(04):813-822.

XU Yang,SONG Zhensen,ZHAO Jincheng,et al.Experimental Research on Temperature Field of Full⁃scale Steel Frame Building during Firefighting by Water Spraying[J].Journal of Disaster Prevention and Mitigation Engineering,2021,41(04):813-822.
徐阳,宋振森,赵金城等.喷水灭火过程中足尺钢框架房屋温度场试验研究[J].防灾减灾工程学报,2021,41(04):813-822. DOI： 10.13409/j.cnki.jdpme.202102020.

XU Yang,SONG Zhensen,ZHAO Jincheng,et al.Experimental Research on Temperature Field of Full⁃scale Steel Frame Building during Firefighting by Water Spraying[J].Journal of Disaster Prevention and Mitigation Engineering,2021,41(04):813-822. DOI： 10.13409/j.cnki.jdpme.202102020.

摘要

喷水灭火行为引起的火场局部温度骤降，有可能引起房屋结构破坏。为研究火灾及消防过程中温度场的分布和变化情况，设计建造了足尺钢框架房屋，根据实际火灾及消防场景设计火灾荷载和消防系统，模拟了真实火灾下窗户玻璃破碎和喷水灭火对火灾温度场的影响。试验过程中利用热电偶测量火灾及消防全过程的火场温度，得到了火场中不同位置的温度变化曲线。根据试验结果，并结合火灾动力学分析了火场温度的空间分布和变化规律。研究表明：火灾过程中，火场在垂直方向上存在明显的温度梯度，空气温度随高度增加而升高；框架平面沿水平方向越靠近起火点，升温速率越快，能达到的最高温度越高，垂直方向温度梯度越大；玻璃破碎增大了通风口面积，对通风控制型火灾的温度场有显著影响，靠近通风口处温度略有降低，而远离通风口的火场纵深处温度大幅上升；消防喷水能迅速抑制火场燃烧，降低火场温度，降温速率随喷水灭火时间增长而减小；开始灭火的短时间内，火源附近温度骤降，降温速率最高达到391 ℃/min。

Abstract

A sudden drop of local fire temperature field due to water spraying during firefighting may cause damage in steel frame buildings. In this study， a full-scale steel frame building was designed and constructed for investigating the distribution and variation of temperature field under fire as well as during firefighting process. The fire load and firefighting system were designed according to actual fire and firefighting scenarios， respectively. The influences of window glass broken and water spraying on fire temperature field were simulated in the test. During testing， the temperature distributions throughout the whole fire and firefighting processes were carefully measured by thermocouples， and the temperature-time curves at various positions of the fire site were obtained. The experimentally obtained spatial distribution and variation of fire temperature field were analyzed in the present study based on fire dynamics theories. The results indicate that there is an obvious temperature gradient in the vertical direction of the fire site， and the air temperature increases with the increase of height. In the frame plane， the closer to the fire point， the bigger the heating rate， the higher the maximum temperature， and the greater the temperature gradient in the vertical direction were recorded. The broken glass increases the vent area， as a result significantly influences the temperature field of a ventilation-controlled fire； the temperature near the vent decreases slightly， while the temperature in deep of the fire field far away from the vent increases significantly. Water spraying can significantly suppress the fire field combustion and reduce the temperature of the fire site. The cooling rate decreases with the prolongation of the water spraying time. Within a short time after firefighting started， the temperature near the fire source drops sharply， and the cooling rate reaches a maximum value of 391 ℃/min.

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references

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