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A risk-targeted seismic performance assessment of elephant-foot buckling in walls of unanchored steel storage tanks
ID Vasquez Munoz, Luz Elizabeth (Author), ID Dolšek, Matjaž (Author)

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Abstract
Unanchored steel storage tanks are used in industrial plants to store oil and other petrochemical liquids. In a major earthquake, such tanks may sustain different types of damage, including elasto-plastic buckling in the shape of an elephant’s foot, which is the object of the research. The methodology introduced in this paper consists of cloud-based 1D site response analysis (SRA) and pushover-based seismic performance assessment of the tank wall using a 3D non-linear model of the tank. The SRA, which considers the recorded ground motions on the rock outcrop and the sample of interval shear-wave velocity profiles, is carried out to estimate spectral accelerations at the tank impulsive period. By adopting the code-based model of hydrodynamic pressures, the seismic demand on the tank wall is then calculated by pushover analysis. The risk-targeted decision model is used for safety verification. The proposed methodology is demonstrated through an example of a large liquid storage tank for which it is shown that the fragility function for peak ground acceleration at the rock outcrop is on the left side of the target fragility function, indicating that the tank cannot be considered safe from elephant-foot buckling. The introduced assessment process is relatively simple if the cloud-based SRA is automated. However, further experimental and numerical investigations are required to confirm the validity range of the pushover analysis for the seismic performance assessment of tanks.

Language:English
Keywords:elephant-foot buckling, pushover analysis, seismic fragility analysis, seismic risk, site response analysis, unanchored steel storage tanks
Work type:Article
Typology:1.01 - Original Scientific Article
Organization:FGG - Faculty of Civil and Geodetic Engineering
Publication status:Published
Publication version:Version of Record
Year:2023
Number of pages:Str. 4126-4147
Numbering:Vol. 52, iss. 13
PID:20.500.12556/RUL-151807 This link opens in a new window
UDC:624.042.7
ISSN on article:0098-8847
DOI:10.1002/eqe.3903 This link opens in a new window
COBISS.SI-ID:165428483 This link opens in a new window
Publication date in RUL:20.10.2023
Views:247
Downloads:35
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Record is a part of a journal

Title:Earthquake engineering & structural dynamics
Shortened title:Earthquake eng. struct. dyn.
Publisher:Wiley
ISSN:0098-8847
COBISS.SI-ID:25358592 This link opens in a new window

Licences

License:CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Link:http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.

Secondary language

Language:Slovenian
Keywords:uklon slonje noge, potisna analiza, analiza potresne ranljivosti, potresno tveganje, analiza odziva tal, nepritrjeni jekleni rezervoarji

Projects

Funder:EC - European Commission
Funding programme:H2020
Project number:721816
Name:Extreme loading analysis of petrochemical plants and design of metamaterial-based shields for enhanced resilience
Acronym:XP-RESILIENCE

Funder:ARRS - Slovenian Research Agency
Project number:P2-0185
Name:Potresno inženirstvo

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