Seismic risk assessment of liquid overtopping in a steel storage tank equipped with a single deck floating roof

Caprinozzi, Stefano; Paolacci, Fabrizio; Dolšek, Matjaž

doi:10.1016/j.jlp.2020.104269

Cited by 19 publications

(12 citation statements)

References 21 publications

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“…32 The tank has a bottom plate thickness t b and annular plate thickness of 0.008 m. Because there is no information about the tank foundation, it was assumed as a concrete ring wall. 66 Based on the review of existing literature, 67,68 the concrete ring wall was then considered as the rigid foundation. The tank has wall with varying thickness, as presented in Table 2.…”

Section: Pushover-based Seismic Performance Assessment (Process B)mentioning

confidence: 99%

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

Munoz

Dolšek

2023

Earthq Engng Struct Dyn

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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.

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Section: Pushover-based Seismic Performance Assessment (Process B)mentioning

confidence: 99%

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

Munoz

Dolšek

2023

Earthq Engng Struct Dyn

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“…The typical structural damages in tank systems (amongst others, see Caprinozzi et al, 16 Merino et al, 64 Bakalis and Karomanos, 15 Merino et al 10 ) have been identified according to field observations after seismic events (Manos, 65 Swan et al, 66 Hatayama et al, 67 Krausman et al, 68 Suzuki, 69 Zareian et al, 70 Brunesi et al 3 ) and also from past experimental and numerical studies (De Angelis et al, 71 Colombo and Almazán, 72 Brunesi et al, 3 Phan et al, 73 Bakalis et al 74 ).…”

Section: Damage States For the Steel Storage Tankmentioning

confidence: 99%

“…The typical structural damages in tank systems (amongst others, see Caprinozzi et al., 16 Merino et al., 64 Bakalis and Karomanos, 15 Merino et al 10 65 Swan et al., 66 Hatayama et al., 67 Krausman et al., 68 Suzuki, 69 Zareian et al., 70 Brunesi et al 3 …”

Section: Damage States For the Steel Storage Tankmentioning

confidence: 99%

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Seismic vulnerability assessment of steel storage tanks protected through sliding isolators

Gabbianelli

Milanesi

Gandelli

et al. 2023

Earthq Engng Struct Dyn

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An adequate seismic protection of steel storage tanks of industrial, chemical and petrochemical plants is essential since potential consequences of failures, besides the economic losses, can be catastrophic for the environment and for people living nearby. Among the most common damages suffered by steel tanks in recent earthquakes, there are the elephant‐foot‐buckling of the perimeter wall and the tanks’ uplift or overturning. Due to the uncertainties related to the estimation of the mechanical properties of filled tanks and related seismic loads (i.e. dynamic overpressures generated by the content), conventional design approaches may lead to unsafe or, on the contrary, oversized solutions. Among effective alternatives, base isolation through Curved Surface Slider isolators (CSSs) offers some valuable advantages like high load bearing and displacement capacity with compact dimensions, independence of the oscillation period on the supported mass, and minimisation of torsional effects. Despite being neglected by most common commercial FEM codes, as a drawback, recent studies pointed out that the initial peak of friction force at CSSs’ motion breakaway can lead to significantly increased lateral deformations and accelerations of the superstructure. Within this framework in this study, a refined numerical model is developed in OpenSees FEM code, and an exhaustive parametric study is carried out to investigate the effect of the breakaway on isolated tanks providing some useful insights for the selection of the most suitable isolators.

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“…It was also found that the percentage reduction in the natural frequency of the impulsive mode remains constant in cases where the conical tank with a slope angle of 30 degrees and 45 degrees, while for tanks with a slope angle of 50 degrees is less. Passive control techniques for seismic protection of chemical plans were investigated in another study which offered applicability of PCT as mitigation strategy [13][14][15][16][17]. In another study, two full-size reservoirs for buckling behavior under general and local differential settlement were investigated using the FEM software model with non-linear geometric algorithm.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on the Effect of Seal Presence on the Behavior of Double-Deck Floating Roofs in Cylindrical Steel Storage Tanks

Doustvandi¹,

Roudsari²,

Niazi³

2023

Structural Durability &Amp; Health Monitoring

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Liquid storage, particularly oil and petrochemical products which are considered hazardous liquid, are an important part of the oil industry. Thin-walled vertical cylindrical steel storage tanks are widely used in recent years. Due to high sensitivity of these structures in an earthquake and other external excitations may lead to catastrophic consequences. For instance, huge economic losses, environmental damages, and casualities, many studies have been done about these structures. past studies showed that liquid storage tanks, equipped with a floating roof, are potentially vulnerable while subjected to seismic loads and earthquake has been considered as one of the most destructive natural hazards. The reason is that such tanks are made of two separated parts (shell and roof) which each may have its own responses; sometimes causing resonance phenomenon and so that, roof movements, rooffluid interaction, roof-shell interaction, and also the way they are attached should still be investigated. Experimental tests of floating roof 's vertical fluctuation was performed in a full-scale reservoir tank and assessing of the results demonstrated that presence of a seal between floating roof and shell plate can significantly increase damping ratio in liquid sloshing and also suppress the roof`s vertical displacements. In other words, seal can control a floating roof and make it stop moving vertically over few cycles.

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Seismic risk assessment of liquid overtopping in a steel storage tank equipped with a single deck floating roof

Cited by 19 publications

References 21 publications

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

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

Seismic vulnerability assessment of steel storage tanks protected through sliding isolators

Experimental Investigation on the Effect of Seal Presence on the Behavior of Double-Deck Floating Roofs in Cylindrical Steel Storage Tanks

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