There is a risk of a building suffering unsustainable structural damage in the event of a large fire. Therefore, it is necessary to design buildings to withstand expected fires. A widely used simplified calculation method is the so-called “time-equivalence” method. There are significant concerns about the suitability of this method. This paper is part II of a twofold study examining the state of the art of time-equivalence methods. The purpose of this paper is to identify methods and/or analysis concepts which show the potential for use in modern design. A SWOT (Strengths, Weaknesses, Opportunities, and Threats) analysis is used for this purpose. However, as there is a large number of time-equivalence methods to assess, a numerical case study is first undertaken to identify methods which have sufficient accuracy to warrant further study. These analyses found that, while none of the time-equivalence methods studied have sufficient accuracy for use in their present form, the methods derived using the equal energy concept provide a good basis to model the effects of fire on a structure. This study recommends that a new time-equivalence method be developed using the equal energy approach.

中文翻译：

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确定结构火灾严重性的方法回顾——第二部分：分析和回顾

如果发生大火，建筑物可能会遭受不可持续的结构损坏。因此，有必要设计建筑物以承受预期的火灾。一种广泛使用的简化计算方法是所谓的“时间等效”法。人们对这种方法的适用性有很大的担忧。本文是一项双重研究的第二部分，该研究考察了时间等价方法的最新技术。本文的目的是确定方法和/或分析概念，这些方法和/或分析概念显示了在现代设计中的使用潜力。为此使用 SWOT（优势、劣势、机会和威胁）分析。然而，由于有大量的时间等效方法需要评估，因此首先进行数值案例研究以确定具有足够准确性以保证进一步研究的方法。这些分析发现，虽然所研究的时间等价方法都没有足够的准确性以用于当前形式，但使用等能概念推导出的方法为模拟火灾对结构的影响提供了良好的基础。本研究建议使用等能量方法开发一种新的时间等价方法。