According to the concept of performance‐based design, the fire safety design of the timber structures should be focused on the actual design fire, which represents the realistic fire situation in a given building. However, the current prescriptive only provides a method for evaluating the fire resistance of timber components under standard fire. This paper proposed an energy‐based time equivalent approach (EBTEA) for evaluating the fire resistance of the timber components in realistic design fire scenarios. As an alternative, this method was based on the principle of energy equivalence so that the fire resistance design of timber components exposed to realistic fires was standardized, which can make fire resistance rating database available under standard fire exposure and promote performance‐based design. The validity of the method was verified by comparing the predicted values of EBTEA with the existing values obtained from the nonlinear finite element analysis. The proposed method was further simplified by analyzing the key factors of energy equivalence and using nonlinear fitting methods to facilitate the use of designers. The simplified EBTEA can predict equivalent fire resistance of timber components under realistic design fire scenarios.

中文翻译：

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基于能量的时间等效方法，用于评估暴露于实际设计火灾曲线的木材部件的耐火性

根据基于性能的设计的概念，木结构的防火设计应着重于实际设计火灾，该火灾代表了给定建筑物中的实际火灾情况。但是，当前的说明仅提供了一种用于评估标准火灾下木材组件耐火性的方法。本文提出了一种基于能量的时间等效方法（EBTEA），用于评估现实设计火灾场景中木材组件的耐火性。作为替代方案，此方法基于能量等效原理，从而使暴露于真实火灾的木材组件的耐火设计标准化，这可以使标准耐火下的耐火等级数据库可用，并促进基于性能的设计。通过将EBTEA的预测值与通过非线性有限元分析获得的现有值进行比较，验证了该方法的有效性。通过分析能量等效性的关键因素并使用非线性拟合方法来简化设计人员的使用，从而进一步简化了所提出的方法。简化的EBTEA可以预测实际设计火灾场景下木材组件的等效耐火性。