Being able to efficiently mitigate the effects of blast loads on structures, sacrificial cladding solutions are increasingly used to protect structural elements from the effects of accidental explosions and/or terrorist attacks. The present study analyses the loss of effectiveness of a deterministically designed sacrificial cladding when variability in the material properties and uncertainties in the mechanical model are considered. The results of an experimental campaign are used to validate the numerical models that allow the deterministic design of a sacrificial cladding which successfully improves the blast resistant capabilities of a given structural element. Nonetheless, it is shown that, taking into account the probabilistic variability of key parameters is of vital importance when designing sacrificial cladding solutions, since, when not properly designed for the structural element it intends to protect, adding a sacrificial cladding might negatively impact its blast resistant capabilities. Additionally, it is concluded that the deterministic approach might be against safety. In the reported case study, when comparing the admissible charge weight yielding from the deterministic and probabilistic approaches, one verifies that the former allows a higher charge weight.

为了能够有效减轻爆炸载荷对结构的影响，牺牲性覆层解决方案越来越多地用于保护结构元件免受意外爆炸和/或恐怖袭击的影响。当考虑材料特性的变化和力学模型的不确定性时，本研究分析了确定性设计的牺牲性覆层的有效性损失。实验活动的结果用于验证数值模型，该数值模型可以确定性地设计牺牲包层，从而成功提高给定结构元件的抗爆炸能力。尽管如此，结果表明，在设计牺牲包层解决方案时，考虑到关键参数的概率变异性至关重要，因为，如果没有针对要保护的结构元件进行适当设计，则添加牺牲性覆层可能会对其抗爆炸能力产生负面影响。此外，得出的结论是，确定性方法可能会违反安全性。在报告的案例研究中，当比较确定性方法和概率方法产生的可允许电荷权重时，人们证实前者允许更高的电荷权重。