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首页> 外文期刊>Journal of structural fire engineering >Why Broadgate Phase 8 composite floor did not fail under fire : Numerical investigation using ANSYS® FEA code
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Why Broadgate Phase 8 composite floor did not fail under fire : Numerical investigation using ANSYS® FEA code

机译：为什么Broadgate Phase 8复合地板在火灾中不会失败：使用ANSYS®FEA代码进行数值研究

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Purpose - This paper aims to present the findings of a numerical investigation into the performance of the steel-concrete composite floor involved in Broadgate Phase 8 fire. Design/methodology/approach - The investigation is conducted by carrying out a 3-D thermomechanical analysis of a composite floor similar to the one involved in the fire using ANSYS. Four fire scenarios are investigated, with each producing a unique stress - strain pattern. The results obtained are compared with the observations made after the fire and inferences drawn. Findings - The results obtained are found to be correlated with the observations made after the fire. The performance of the composite floor is found to be dominated by development of large strains, leading to large deflections. Furthermore, colder parts of the structure, through redistribution of forces, are found to have a profound impact on the ability of a composite floor to resist heating effects. From the findings, it is concluded that connections' design, occurrence of membrane action and thermal restraints were the key reasons the floor did not fail. Originality value - The study takes a more forensic approach. This is a departure from majority of published literature, where comparison is usually between experimental and numerical results. By comparing the findings from a real fire with those of a numerical investigation, the study provides an insight into the accuracy of applying numerical models for the prediction of effects of fire on structural behaviour.
机译：目的-本文旨在介绍对Broadgate 8期火灾涉及的钢混凝土复合地板性能进行数值研究的结果。设计/方法/方法-通过对复合地板进行3-D热力学分析（类似于使用ANSYS进行火灾的复合地板）进行调查。研究了四种火灾情况，每种情况均产生独特的应力-应变模式。将获得的结果与火灾后的观察结果和推论进行比较。结果-发现的结果与大火后的观察结果相关。发现复合地板的性能主要受大应变发展的影响，从而导致大挠度。此外，发现结构的较冷部分通过力的重新分配对复合地板抵抗加热作用的能力具有深远的影响。从发现中可以得出结论，连接的设计，膜作用的发生和热约束是地板没有失效的关键原因。原创性价值-该研究采用了更具鉴识力的方法。这与大多数已发表的文献有所不同，后者通常将实验结果和数值结果进行比较。通过将真实火灾的结果与数值研究的结果进行比较，该研究为应用数值模型预测火灾对结构行为的影响的准确性提供了见解。

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