Buckling behavior of the anchored steel tanks under horizontal and vertical ground motions using static pushover and incremental dynamic analyses

Sobhan, M.S.; Rofooei, Fayaz R.; Attari, Nader K. A.

doi:10.1016/j.tws.2016.12.022

Cited by 41 publications

(13 citation statements)

References 18 publications

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“…During the site inspections following the 2016 earthquakes it was identified that following the 2013 earthquakes, winery operators placed emphasis on strengthening of larger capacity wine tanks by using new energy dissipation devices, leaving smaller wine tanks mostly with outdated anchorage systems (see Figure 7). Elephant-foot buckling (see Figure 3i) generally occurs in tanks that are mostly fully filled, is an elastic-plastic type of instability [43], [46], [16], and can be described as an outward bulge of the tank wall shell, whereas diamond shaped buckling (see Figure 3h) is a type of elastic instability [43], [46], [16]. Sobhan et al [46] stated that elephant-foot buckling of the steel tank wall is caused by the interaction of both circumferential tensile stress close to the yield strength and by axial compressive stress exceeding the critical stress, whilst diamond shaped buckling is caused by severe axial compressive stresses.…”

Section: Collapsed Tank Barrelmentioning

confidence: 99%

“…Elephant-foot buckling (see Figure 3i) generally occurs in tanks that are mostly fully filled, is an elastic-plastic type of instability [43], [46], [16], and can be described as an outward bulge of the tank wall shell, whereas diamond shaped buckling (see Figure 3h) is a type of elastic instability [43], [46], [16]. Sobhan et al [46] stated that elephant-foot buckling of the steel tank wall is caused by the interaction of both circumferential tensile stress close to the yield strength and by axial compressive stress exceeding the critical stress, whilst diamond shaped buckling is caused by severe axial compressive stresses. Compared with the 2013 earthquakes, in the 2016 earthquake larger percentages of elephant foot buckling and diamond shaped buckling were observed, with earthquake elephant-foot buckling (11.0%) and diamond shaped buckling (6.1%) causing the highest percentage of severe (section replacement) damage to the barrel.…”

Section: Collapsed Tank Barrelmentioning

confidence: 99%

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Analysis of Damage Data Collected for Wine Storage Tanks Following the 2013 and 2016 New Zealand Earthquakes

Yazdanian

Ingham

Kahanek³

et al. 2020

BNZSEE

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The 2013 Seddon earthquake (Mw 6.5), the 2013 Lake Grassmere earthquake (Mw 6.6), and the 2016 Kaikōura earthquake (Mw 7.8) provided an opportunity to assemble the most extensive damage database to wine storage tanks ever compiled worldwide. An overview of this damage database is presented herein based on the in-field post-earthquake damage data collected for 2058 wine storage tanks (1512 legged tanks and 546 flat-based tanks) following the 2013 earthquakes and 1401 wine storage tanks (599 legged tanks and 802 flat-based tanks) following the 2016 earthquake. Critique of the earthquake damage database revealed that in 2013, 39% and 47% of the flat-based wine tanks sustained damage to their base shells and anchors respectively, while due to resilience measures implemented following the 2013 earthquakes, in the 2016 earthquake the damage to tank base shells and tank anchors of flat-based wine tanks was reduced to 32% and 23% respectively and instead damage to tank barrels (54%) and tank cones (43%) was identified as the two most frequently occurring damage modes for this type of tank. Analysis of damage data for legged wine tanks revealed that the frame-legs of legged wine tanks sustained the greatest damage percentage among different parts of legged tanks in both the 2013 earthquakes (40%) and in the 2016 earthquake (44%). Analysis of damage data and socio-economic findings highlight the need for industry-wide standards, which may have socio-economic implications for wineries.

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Section: Collapsed Tank Barrelmentioning

confidence: 99%

Section: Collapsed Tank Barrelmentioning

confidence: 99%

Analysis of Damage Data Collected for Wine Storage Tanks Following the 2013 and 2016 New Zealand Earthquakes

Yazdanian

Ingham

Kahanek³

et al. 2020

BNZSEE

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“…Dynamic buckling mainly appears in an oscillating liquid-filled tank owing to the liquid-tank interaction, and many researchers have explored the buckling of steel tanks subjected to seismic loads with numerical models [9,[13][14][15]. These studies have demonstrated the need for a sophisticated model of structural analysis that can account for hydrodynamic pressures when analyzing the seismic response and fragility of a liquid storage tank.…”

Section: Mathematical Problems In Engineeringmentioning

confidence: 99%

“…As mentioned above, dynamic buckling is a well-known structural behavior of steel liquid storage tanks subjected to earthquake ground motions. Buratti and Tavano [9], Virella et al [13], Djermane et al [14], and Sobhan et al [15] investigated the buckling stability of steel tanks with numerical models. The buckling phenomena in a liquidoscillating steel tank are generally classified as elastic and elastoplastic buckling.…”

Section: Seismic Fragility Assessmentmentioning

confidence: 99%

Seismic Fragility Analysis of Steel Liquid Storage Tanks Using Earthquake Ground Motions Recorded in Korea

Lee

Kim

Lee

2019

Mathematical Problems in Engineering

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Liquid-containing storage tanks are important structures in industrial complexes. Because earthquake damages to liquid storage tanks can cause structural collapse, fires, and hazardous material leaks, there have been continuous efforts to mitigate earthquake damages using seismic fragility analysis. In this regard, this study focuses on the seismic responses and fragility of liquid storage tanks. First, the characteristics of earthquake ground motions are a critical factor influencing the seismic fragility of structures; thus, this study employs real earthquake records observed in the target area, southeastern Korea, with the earthquake characteristics estimated based on the ratio of peak ground acceleration to peak ground velocity. When a liquid storage tank oscillates during an earthquake, additional forces can impact the tank wall owing to hydrodynamic pressures. Therefore, this study presents a sophisticated finite element (FE) model that reflects the hydrodynamic effect of an oscillating liquid. Another advantage of such an FE model is that detailed structural responses of the entire wall shells can be estimated; this is not possible in simplified lumped mass or surrogate models. Lastly, probabilistic seismic demand models are derived for three critical limit states: elastic buckling, elephant’s foot buckling, and steel yielding. Using the real earthquake ground motion records, constructed FE model, and limit states, a seismic fragility analysis is performed for a typical anchored steel liquid storage tank in Korea. In addition, for comparison purposes, a ring-stiffened model is investigated to derive a seismic fragility curve. The results of the seismic fragility assessment show that elastic buckling is the most vulnerable damage state. In contrast, elephant’s foot buckling and steel yielding indicate relatively severe damage levels. Furthermore, it is observed that ring stiffeners decrease the elastic buckling damage, although there is no practical effect on elephant’s foot buckling and steel yielding in all ground motion intensities.

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“…This type of buckling failure is common in tanks after they have been damaged by earthquakes due to the axial forces induced by overturning moments (Rotter, 1990(Rotter, , 2006. Cyclic loading may cause an elephant's foot buckle to extend around the complete circumference at the bottom of the tank wall (Djermane et al, 2014;Sobhana et al, 2017). Elephant's foot buckling can also be predicted for non-empty thin silos under wind loads (Cao et al, 2018;Zhao et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Fibre reinforced polymer for strengthening cylindrical metal shells against elephant’s foot buckling: An elasto-plastic analysis

Batikha

Chen

Rotter

2018

Advances in Structural Engineering

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This paper describes the use of Fibre Reinforced Polymer (FRP) composites to increase the strength of an isotropic metallic cylindrical shell against elephant's foot buckling. This form of buckling occurs when a cylindrical shell structure is subjected to high internal pressure together with an axial force, such as those that may occur in tanks and silos. It is particularly relevant to tanks under seismic action. Although FRP composites have been widely applied to different types of structures under several loading conditions, its use to strengthen thin steel cylindrical shells has been very limited. Here, a non-linear elasto-plastic finite element idealization is used to explore the strengthening effect of an FRP strip on a thin cylinder. The optimum size and position of the FRP sheet were obtained and empirically formulated. This study has shown that the strength after repair is sensitive to minor changes in the FRP-parameters so that a close adherence to the optimum parameter values is very desirable.

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Buckling behavior of the anchored steel tanks under horizontal and vertical ground motions using static pushover and incremental dynamic analyses

Cited by 41 publications

References 18 publications

Analysis of Damage Data Collected for Wine Storage Tanks Following the 2013 and 2016 New Zealand Earthquakes

Analysis of Damage Data Collected for Wine Storage Tanks Following the 2013 and 2016 New Zealand Earthquakes

Seismic Fragility Analysis of Steel Liquid Storage Tanks Using Earthquake Ground Motions Recorded in Korea

Fibre reinforced polymer for strengthening cylindrical metal shells against elephant’s foot buckling: An elasto-plastic analysis

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