Impacts of Steel LNG Tank Aspect Ratio on Seismic Vulnerability Subjected to Near-Field Earthquakes

Sharari, N; Fatahi, B; Hokmabadi, A; Xu, R

Impacts of Steel LNG Tank Aspect Ratio on Seismic Vulnerability Subjected to Near-Field Earthquakes

Sharari, N Fatahi, B

Hokmabadi, A Xu, R

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Publisher:: Springer Singapore
Publication Type:: Conference Proceeding
Citation:: Lecture Notes in Civil Engineering, 2022, 215, pp. 941-956
Issue Date:: 2022-01-01

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Field	Value	Language
dc.contributor.author	Sharari, N
dc.contributor.author	Fatahi, B https://orcid.org/0000-0002-7920-6946
dc.contributor.author	Hokmabadi, A
dc.contributor.author	Xu, R
dc.date.accessioned	2023-01-31T07:12:33Z
dc.date.available	2023-01-31T07:12:33Z
dc.date.issued	2022-01-01
dc.identifier.citation	Lecture Notes in Civil Engineering, 2022, 215, pp. 941-956
dc.identifier.isbn	9789811679230
dc.identifier.issn	2366-2557
dc.identifier.issn	2366-2565
dc.identifier.uri	http://hdl.handle.net/10453/165686
dc.description.abstract	Liquefied Natural Gas (LNG) tanks seismic design is critically important considering the high consequences of failure given the hazardous nature of the stored product. The LNG tanks aspect ratio (H/D), as decided at the design stage based on several considerations, can impact its dynamic characteristic and in turn the seismic performance of the tank under the design earthquakes. In this paper, the seismic vulnerability of the inner steel LNG tanks with varying height (H) to diameter (D) aspect ratios is investigated. Dynamic fluid–structure interaction is captured using the added-mass method and tank walls are modelled using general-purpose finite element software ABAQUS considering the material and geometric nonlinearities. Adopting time-history analysis, deformation and stresses developed in the tank subjected to two large near-field earthquakes namely 1994 Northridge and 1995 Kobe earthquakes are assessed. The results demonstrate that the tank aspect ratio (H/D) plays an important role in the modes of failure, where increasing the aspect ratio (tall tanks) initiates the elephant’s foot buckling mode of failure. The selection of optimum aspect ratio can lead to a safe and economic seismic design.
dc.language	en
dc.publisher	Springer Singapore
dc.relation.ispartof	Lecture Notes in Civil Engineering
dc.relation.isbasedon	10.1007/978-981-16-7924-7_61
dc.rights	info:eu-repo/semantics/closedAccess
dc.title	Impacts of Steel LNG Tank Aspect Ratio on Seismic Vulnerability Subjected to Near-Field Earthquakes
dc.type	Conference Proceeding
utslib.citation.volume	215
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	/University of Technology Sydney/Strength - CBI - Centre for Built Infrastructure
utslib.copyright.status	closed_access	*
dc.date.updated	2023-01-31T07:12:24Z
pubs.publication-status	Published
pubs.volume	215

Abstract:

Liquefied Natural Gas (LNG) tanks seismic design is critically important considering the high consequences of failure given the hazardous nature of the stored product. The LNG tanks aspect ratio (H/D), as decided at the design stage based on several considerations, can impact its dynamic characteristic and in turn the seismic performance of the tank under the design earthquakes. In this paper, the seismic vulnerability of the inner steel LNG tanks with varying height (H) to diameter (D) aspect ratios is investigated. Dynamic fluid–structure interaction is captured using the added-mass method and tank walls are modelled using general-purpose finite element software ABAQUS considering the material and geometric nonlinearities. Adopting time-history analysis, deformation and stresses developed in the tank subjected to two large near-field earthquakes namely 1994 Northridge and 1995 Kobe earthquakes are assessed. The results demonstrate that the tank aspect ratio (H/D) plays an important role in the modes of failure, where increasing the aspect ratio (tall tanks) initiates the elephant’s foot buckling mode of failure. The selection of optimum aspect ratio can lead to a safe and economic seismic design.

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http://hdl.handle.net/10453/165686