期刊
ENGINEERING STRUCTURES
卷 240, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.engstruct.2021.112279
关键词
Sacrificial cladding; Robustness assessment; Blast load; Probabilistic variability
资金
- Portuguese funding institution FCT - Fundacao para a Ciencia e Tecnologia [SFRH/BD/115599/2016, PTDC/ECI-EST/31046/2017]
- Fundação para a Ciência e a Tecnologia [PTDC/ECI-EST/31046/2017, SFRH/BD/115599/2016] Funding Source: FCT
Although sacrificial cladding solutions are effective in improving the blast resistant capabilities of structural elements, considering the probabilistic variability of key parameters is crucial in the design process to prevent negative impacts on structural safety. Additionally, deterministic approaches may allow for higher charge weights compared to probabilistic approaches.
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.
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