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http://dx.doi.org/10.5762/KAIS.2017.18.4.718

Seismic Fragility Assessment of Liquid Storage Tanks by Finite Element Reliability Analysis  

Lee, Sangmok (School of Urban and Environmental Engineering, Ulsan National Institute of Science and Technology)
Lee, Young-Joo (School of Urban and Environmental Engineering, Ulsan National Institute of Science and Technology)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.18, no.4, 2017 , pp. 718-725 More about this Journal
Abstract
A liquid storage tank is one of the most important structures in industrial complexes dealing with chemicals, and its structural damage due to an earthquake may cause a disastrous event such as the leakage of hazardous materials, fire, and explosion. It is thus essential to assess the seismic fragility of liquid storage tanks and prepare for seismic events in advance. When a liquid storage tank is oscillated by a seismic load, the hydrodynamic pressure caused by the liquid-structure interaction increases the stress and causes structural damage to the tank. Meanwhile, the seismic fragility of the structure can be estimated by considering the various sources of uncertainty and calculating the failure probabilities in a given limiting state. To accurately evaluate the seismic fragility of liquid storage tanks, a sophisticated finite element analysis is required during their reliability analysis. Therefore, in this study, FERUM-ABAQUS, a recently-developed computational platform integrated with commercial finite element and reliability analysis software packages, is introduced to perform the finite element reliability analysis and calculate the failure probability of a liquid storage tank subjected to a seismic load. FERUM-ABAUS allows for automatic data exchange between these two software packages and for the efficient seismic fragility assessment of a structure. Using this computational platform, the seismic fragility curve of a liquid storage tank is successfully obtained.
Keywords
Finite element reliability analysis; Fragility curve; Liquid storage tank; Liquid-structure interaction; Seismic fragility;
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Times Cited By KSCI : 3  (Citation Analysis)
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