Thermal Breakage of Tempered Glass Façade with Down-Flowing Water Film Under Different Heating Rates

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• 作者：Guangzheng Shao ; Qingsong Wang ; Han Zhao ; Yu Wang ; Jinhua Sun…
• 关键词：Tempered glass ; Thermal breakage ; Water film ; Heating rate ; Fire
• 刊名：Fire Technology
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：52
• 期：2
• 页码：563-580
• 全文大小：1,926 KB
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• 作者单位：Guangzheng Shao (1)
  Qingsong Wang (1) (2)
  Han Zhao (1)
  Yu Wang (1)
  Jinhua Sun (1) (2)
  Linghui He (1)
  
  1. State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei, 230026, People’s Republic of China
  2. Collaborative Innovation Center for Urban Public Safety, Hefei, 230026, Anhui Province, People’s Republic of China
  
• 刊物类别：Engineering
• 刊物主题：Civil Engineering
  Mechanics
  Characterization and Evaluation Materials
  Physics
  
• 出版者：Springer Netherlands
• ISSN：1572-8099

文摘

The objective of this work is to investigate the effect of the heating rate on the thermal breakage and fallout behavior of the tempered glass with down-flowing water film. The heating rate of the glass panes was controlled by changing the distance between the fire source and the glazing surface, which ranged from 0.6°C s−1 to 1.0°C s−1. N-heptane pool fire was adopted to heat up the glass panes and the fuel pan was positioned 500 or 600 mm away from the exposed glass surface. During the experiments the water film was initiated manually when the maximum glazing temperature reached different designed values. The results show that all the glazing panes kept their integrity when the fire source distance was 500 mm. In contrast, all the glass panes cracked and fell out the frame when the fire source distance was 600 mm except the one with the water film discharged at 200°C. The results illustrate that the heating rate plays a key role on the breakage of glass façades. Under the effect of water film or sprinkler system, glass panes are more likely to fail when exposed to a fire with smaller heat release rate or greater distance, rather than the opposite case.