Numerical Simulation of Na-Tech Cascading Disasters in a Large Oil Depot

The mechanism of natural-hazard-triggered technological (Na-tech) cascading disasters is complex, and the extent to which their damage is aggravated by various secondary events is difficult to quantify. This study selected a large oil depot and constructed a full-scale three-dimensional scene model...

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Bibliographic Details
Published in:International journal of environmental research and public health 2020-11, Vol.17 (22), p.8620
Main Authors: Zhang, Shaobiao, Xu, Dayong, Shen, Gansu, Liu, Junguo, Yang, Lili
Format: Article
Language:English
Subjects:
Computer simulation
Construction
Contact force
Dams
Disasters
Discrete element method
Earthquakes
Environment
Finite volume method
Fluid mechanics
Landslides
Landslides & mudslides
Mathematical models
Numerical methods
Oil
Rainfall
Seismic engineering
Simulation
Technology
Vapor clouds
Variance analysis
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Summary:The mechanism of natural-hazard-triggered technological (Na-tech) cascading disasters is complex, and the extent to which their damage is aggravated by various secondary events is difficult to quantify. This study selected a large oil depot and constructed a full-scale three-dimensional scene model based on the surrounding geographical environment. The discrete element method (DEM), finite element method (FEM) and finite volume method (FVM) were employed to conduct numerical simulations of the process and consequences of the following Na-tech disasters: heavy-rainfall-induced landslide → blocks impacting an oil transportation pipeline and breaking it → oil leaking, spreading and resulting in a vapor cloud explosion. According to the results, the maximum impact of the 1 m of sliding mass formed in the landslide on the pipeline was over 7 MN (meganewton), and the pipeline fractured completely when it was loaded with a contact force of only 1.44 MN. The numerical simulation methods revealed the mechanism of Na-tech cascading disasters in a large oil depot and quantified the consequences of each event in the cascading disasters.
ISSN:1660-4601
1661-7827
1660-4601
DOI:10.3390/ijerph17228620