A risk-targeted seismic performance assessment of elephant-foot buckling in walls of unanchored steel storage tanks

Vasquez Munoz, Luz Elizabeth (avtor), Dolšek, Matjaž (avtor)

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.

• Jezik: Angleški jezik
• Ključne besede: elephant-foot buckling, pushover analysis, seismic fragility analysis, seismic risk, site response analysis, unanchored steel storage tanks
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FGG - Fakulteta za gradbeništvo in geodezijo
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2023
• Št. strani: Str. 4126-4147
• Številčenje: Vol. 52, iss. 13
• PID: 20.500.12556/RUL-151807
• UDK: 624.042.7
• ISSN pri članku: 0098-8847
• DOI: 10.1002/eqe.3903
• COBISS.SI-ID: 165428483
• Datum objave v RUL: 20.10.2023

Gradivo je del revije

• Naslov: Earthquake engineering & structural dynamics
• Skrajšan naslov: Earthquake eng. struct. dyn.
• Založnik: Wiley
• ISSN: 0098-8847
• COBISS.SI-ID: 25358592

Licence

• Licenca: CC BY-NC-ND 4.0, Creative Commons Priznanje avtorstva-Nekomercialno-Brez predelav 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by-nc-nd/4.0/deed.sl
• Opis: Najbolj omejujoča licenca Creative Commons. Uporabniki lahko prenesejo in delijo delo v nekomercialne namene in ga ne smejo uporabiti za nobene druge namene.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: uklon slonje noge, potisna analiza, analiza potresne ranljivosti, potresno tveganje, analiza odziva tal, nepritrjeni jekleni rezervoarji

Projekti

• Financer: EC - European Commission
• Program financ.: H2020
• Številka projekta: 721816
• Naslov: Extreme loading analysis of petrochemical plants and design of metamaterial-based shields for enhanced resilience
• Akronim: XP-RESILIENCE

• Financer: ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
• Številka projekta: P2-0185
• Naslov: Potresno inženirstvo