Abstract Contemporary structural fire statistics are fundamental in engineering design practice to evaluate likelihood and consequence of fire for different property types, and to investigate how different safety measures impact fire spread. British Standard PD 7974-7:2003 has recently been updated using USA fire statistics; this paper compares PD 7974-7:2003 to current England statistics (named UK statistics) using one public and one Home Office dataset. PD 7974-7:2003 overestimates fire frequency with values up to 5 times greater than the ones found in UK and USA. When fire frequency is plotted against total floor space, for different property types, power laws with positive or negative exponent and polynomial functions provide better approximations of the data than the current codes. Average area damage from PD 7974-7:2003 has been compared to fire and total damage from UK datasets where fire size is usually well confined to room of origin at 20% of fires based on the publicly available dataset. When fires exceeding specific areas of damage are considered, PD 7974-7:2003 usually overestimates fire damage and underestimates total damage, with more damage evident when sprinklers are absent compared to when they are present.

中文翻译：

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根据 BS PD 7974-7 评估英国统计数据的火灾频率和结构火灾行为

摘要 当代结构火灾统计是工程设计实践中的基础，用于评估不同属性类型火灾的可能性和后果，并研究不同的安全措施如何影响火势蔓延。英国标准 PD 7974-7:2003 最近使用美国火灾统计数据进行了更新；本文使用一个公共数据集和一个内政部数据集将 PD 7974-7:2003 与当前的英格兰统计数据（称为英国统计数据）进行了比较。PD 7974-7:2003 高估了火灾频率，其值比在英国和美国发现的值高 5 倍。当根据总建筑面积绘制火灾频率时，对于不同的属性类型，具有正指数或负指数和多项式函数的幂律提供比当前代码更好的数据近似值。来自 PD 7974-7 的平均区域伤害：将 2003 年与英国数据集的火灾和总损失进行了比较，其中基于公开可用的数据集，20% 的火灾规模通常很好地局限于起源房间。当考虑超过特定损害区域的火灾时，PD 7974-7:2003 通常会高估火灾损害并低估总损害，与存在洒水喷头时相比，没有洒水喷头时造成的损害更明显。