钢筋混凝土板的防火性能：火焰的直接影响

IF 1 Q4 ENGINEERING, CIVIL

Jordan Journal of Civil Engineering Pub Date : 2024-01-01 DOI:10.14525/jjce.v18i1.08

Raneen Aldarf

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引用次数: 0

摘要

本研究调查了直接暴露于火中的双向钢筋混凝土板的行为。板坯在燃气炉中暴露于火中一小时，通过将火源数量从三个增加到六个来改变火焰蔓延面积。板坯的冷却方式有两种：逐渐冷却和突然冷却。结果表明，火焰蔓延面积对板坯的承载能力和挠度有显著影响。当火焰蔓延面积增大时，逐渐冷却的承载能力降低了 20.68%，突然冷却的承载能力降低了 33.78%。当火焰蔓延面积增大时，破坏时的挠度在逐渐冷却时增加了 26.3%，在突然冷却时增加了 33.78%。与参照板相比，随着火焰蔓延面积的增加，逐渐冷却板的延性系数增加了 12.6% 至 50.3%，突然冷却板的延性系数增加了 50.3% 至 59.6%。关键词：钢筋实心混凝土板直燃火焰热火焰冷却方法

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Fire Performance of Reinforced Concrete Slabs: Direct Flame Effects

The behaviour of two-way reinforced-concrete slabs exposed to direct fire was investigated in this study. The slabs were exposed to fire for one hour in a gas furnace and the flame-spread area was varied by increasing the number of fire sources from three to six. The slabs were cooled in two different ways: gradual cooling and sudden cooling. The results showed that the flame-spread area had a significant effect on the load-carrying capacity and deflection of the slabs. The load-carrying capacity decreased by 20.68% with gradual cooling and by 33.78% with sudden cooling when the flame-spread area was increased. The deflection at failure increased by 26.3% with gradual cooling and by 33.78% with sudden cooling when the flame-spread area was increased. The ductility factor showed an increase of 12.6% to 50.3 % for gradually-cooled slabs and of 50.3% to 59.6% for suddenly-cooled slabs with an increasing flame-spread area, compared to reference slabs. KEYWORDS: Reinforced solid concrete slabs, Direct fire flame, Thermal flame, Cooling method.

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来源期刊

Jordan Journal of Civil Engineering ENGINEERING, CIVIL-

CiteScore

2.10

自引率

27.30%

发文量

期刊介绍： I am very pleased and honored to be appointed as an Editor-in-Chief of the Jordan Journal of Civil Engineering which enjoys an excellent reputation, both locally and internationally. Since development is the essence of life, I hope to continue developing this distinguished Journal, building on the effort of all the Editors-in-Chief and Editorial Board Members as well as Advisory Boards of the Journal since its establishment about a decade ago. I will do my best to focus on publishing high quality diverse articles and move forward in the indexing issue of the Journal.