Abstract Assessing life safety by comparing the available safe egress time (ASET) and the required safe egress time (RSET) is a prominent task in performance-based fire safety design. The calculation of a safety margin by subtracting RSET from ASET is a straightforward concept and is easy to understand. However, when the concept was developed, fire and evacuation models only provided punctual information derived from experimental correlations or hand calculations. Nowadays, complex computer models for fire and evacuation dynamics have become state of the art. However, the ASET-RSET concept has not adapted to these developments. While uncertainties related to the model input and the model application are widely recognised, uncertainties emerging from analysing the output only play a subordinate role. Therefore, we introduce a map representation of ASET and RSET. The maps are generated by a spatial evaluation of the quantities used to determine ASET and RSET. Based on that, a difference map is introduced to represent the safety margin throughout the entire domain. Finally, a method is proposed to reduce the high information content of the difference maps to one scalar measure of consequences. This facilitates multivariate or risk-based analysis approaches and thus is able to reduce the uncertainties in performance-based design.

中文翻译：

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ASET-RSET 概念的地图表示

摘要 通过比较可用安全疏散时间 (ASET) 和所需安全疏散时间 (RSET) 来评估生命安全是基于性能的消防安全设计中的一项重要任务。通过从 ASET 中减去 RSET 来计算安全裕度是一个简单的概念并且很容易理解。但是，在开发该概念时，火灾和疏散模型仅提供从实验相关性或手工计算得出的准时信息。如今，用于火灾和疏散动态的复杂计算机模型已成为最先进的技术。然而，ASET-RSET 概念并未适应这些发展。虽然与模型输入和模型应用相关的不确定性已得到广泛认可，但分析输出所产生的不确定性仅起次要作用。所以，我们介绍了 ASET 和 RSET 的地图表示。这些地图是通过对用于确定 ASET 和 RSET 的数量进行空间评估而生成的。在此基础上，引入差异图来表示整个域的安全裕度。最后，提出了一种将差异映射的高信息内容减少到一个后果的标量度量的方法。这有助于多变量或基于风险的分析方法，从而能够减少基于性能的设计中的不确定性。提出了一种方法来将差异映射的高信息内容减少到一个后果的标量度量。这有助于多变量或基于风险的分析方法，从而能够减少基于性能的设计中的不确定性。提出了一种方法来将差异映射的高信息内容减少到一个后果的标量度量。这有助于多变量或基于风险的分析方法，从而能够减少基于性能的设计中的不确定性。