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Reliability analysis of the slab panel method (SPM) for the design of composite steel floors in severe fires

机译：平板钢板法（SPM）在严重火灾中设计复合钢地板的可靠性分析

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Purpose - This paper aims to present a reliability analysis of the slab panel method (SPM) for the design of composite steel floors in severe fires. Rather than seeking to accurately define failure levels, this paper highlights areas of uncertainty in design and their effect on design results, whilst providing approximate reliability levels. Design/methodology/approach - A Monte Carlo simulation has been conducted using the SPM design procedure to produce probability density functions of floor capacity for various floor layouts. Statistical input variables were obtained from the literature. Different configurations, geometries and fire severities are included to demonstrate how predicted floor capacities are influenced. Findings - From the research presented, it is clear that the predicted reliability of SPM systems varies relative to a large number of criteria, but especially parameters related to fire loading. Predicted capacities are shown to be conservative compared to results of furnace and large-scale natural fire tests, which exhibit higher fire resistance. Due to distinct fire hazard categories with associated input values, there are step discontinuities in capacity graphs. Originality/value - Limited research has been done to date on the reliability of structures in fire as discussed in this paper. It is important to verify the reliability levels of systems to ensure that partial and global factors of safety are adequate. Monte Carlo simulations are shown to be effective for calculating the average floor capacities and associated standard deviations. The presentation of probability density functions for composite floors in severe fires is novel.
机译：目的-本文旨在介绍在严重火灾中用于复合钢地板设计的平板面板方法（SPM）的可靠性分析。本文没有寻求准确定义故障级别，而是重点介绍了设计中的不确定性及其对设计结果的影响，同时提供了近似的可靠性级别。设计/方法/方法-已使用SPM设计程序进行了蒙特卡洛模拟，以生成各种地板布局的地板容量的概率密度函数。统计输入变量是从文献中获得的。包括不同的配置，几何形状和火灾严重程度，以演示预测的地板容量如何受到影响。发现-从提出的研究中可以明显看出，SPM系统的预测可靠性相对于大量标准（尤其是与火灾负荷相关的参数）有所不同。与具有较高耐火性的熔炉和大规模自然火灾测试的结果相比，预测的容量显示为保守的。由于不同的火灾危险类别具有关联的输入值，因此容量图中存在阶跃不连续性。原创性/价值-如本文所讨论的，迄今为止，对火灾中建筑物的可靠性进行了有限的研究。验证系统的可靠性水平很重要，以确保部分和全局安全因素足够。蒙特卡洛模拟显示有效地计算了平均地板容积和相关的标准偏差。严重火灾下复合地板的概率密度函数的表示是新颖的。

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