A Static Nonlinear Procedure for the Evaluation of the Elastic Buckling of Anchored Steel Tanks Due to Earthquakes

Virella, Juan C.; Suárez, Luis E.; Godoy, Luis A.

doi:10.1080/13632460701672714

Cited by 22 publications

(6 citation statements)

References 19 publications

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“…Several numerical studies are available on the static buckling of steel tanks. Virella et al [100] proposed a static nonlinear procedure for buckling assessment in cylindrical tanks. They considered geometric and material nonlinearity in their study.…”

Section: Static Buckling Assessmentmentioning

confidence: 99%

State-of-the-Art Review on the Seismic Performance Assessment of On-Ground Steel Cylindrical Tanks

Razzaghi

2023

Vibration

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Steel cylindrical tanks are vital structures for storing various types of liquid in industrial plants or as a component in a water distributing system. As they sometimes are used to store toxic, flammable, and explosive material, their inapt performance during an earthquake may lead to catastrophic consequences. Therefore, practicing engineers, researchers, and industry owners are concerned about their structural safety. Meanwhile, the seismic performance of liquid storage tanks is rather complex. Thus, this subject has garnered many researchers’ interest in the past decades. This paper aims to briefly review the most significant studies on the seismic performance of on-ground steel cylindrical tanks. It focuses on analytical approaches and does not include experimental and on-site ones. Finally, the new horizons for the seismic performance assessment of such structures are presented herein.

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Section: Static Buckling Assessmentmentioning

confidence: 99%

State-of-the-Art Review on the Seismic Performance Assessment of On-Ground Steel Cylindrical Tanks

Razzaghi

2023

Vibration

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“…However, the DPs that can develop in the shell wall, under lateral pressure, are the only connected failure modes to this study. For the case at hand, the considered DPs are: (a) the elastic-plastic buckling known as elephant foot buckling (EFB) [35]; (b) the top-of-wall damage (TWD) which is a possible buckling occurs at the top of the wall [28,34], (c) the elastic buckling occurring near to the middle part of the silo (EB) [7,36].…”

Section: Possible Failure Modes Of Ground-supported Steel Silosmentioning

confidence: 99%

Fragility Curves for Steel Industrial Silos Accounting for Filling Level of Granular-Like Material

Khalil,

Ruggieri,

Tateo

et al. 2023

Proceedings of the 8th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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This study presents an assessment on the seismic fragility of ground-supported steel silos storing solids. As key units in the different industrial sites, storage systems are crucial for the proper and continuous functionality of the relevant industrial operations that can be intended for vital activities such as the food supply. Nevertheless, it is undeniable that storage systems are more vulnerable to seismic events than other units as evidenced in the past. In this context, this work aims to estimate the seismic fragility of ground-supported steel silos, which represent a very common form of storage systems containing granular material. The effect of key factors, such as the silo geometry and the absence/existence of the filling material, which significantly affect the seismic behavior of silos was addressed. In addition, the governing damage patterns is determined. To achieve these goals, two different silos with different distinctive geometries (slender and squat) were investigated considering the empty case and the 90%-filled case. First, a detailed numerical model was built for the investigated cases by using finite element software ABAQUS. After a phase of model validation, the dynamic properties of the silos under investigation were assessed through eigenvalue analysis, while the seismic buckling capacity of the different silos were evaluated through nonlinear static and time-history analysis. Finally, fragility curves of silos were derived by identifying the most critical buckling capacity corresponding to the specific damage patterns, showing the influence of each parameter on the seismic vulnerability and behavior of these kinds of structures.

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“…For the shortest tank (H/D = 0.40), the fundamental mode was a bending mode with a circumferential wave n = 1 and an axial half-wave (m) characterized by a bulge formed near the mid-height of the cylinder. Virella et al (2008) evaluated the elastic buckling of above-ground steel tanks anchored to the foundation due to seismic shaking. The proposed nonlinear static procedure was based on the capacity spectrum method (CSM) utilized for the seismic evaluation of buildings.…”

Section: Dynamic Analysismentioning

confidence: 99%

Generalized SDOF system for dynamic analysis of concrete rectangular liquid storage tanks

Chen¹

2021

Preprint

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Liquid storage tanks are essential facilities in lifeline and industrial systems. To ensure liquid tightness, serviceability is the prime design concern for these structures. While there have been major studies on the behavior of steel tanks, little attention has been paid to the behavior of rectangular concrete tanks. In this study, the dynamic response of concrete rectangular liquid storage tanks is investigated. In the current design practice, the response of liquid and tank structure is determined based on rigid tank wall and the lumped mass approach. However, the results of analysis show that the flexibility of tank wall increases the hydrodynamic pressures as compared to the rigid wall assumption. Also, recent studies show that the lumped added mass method leads to overly conservative results in terms of base shear and base moment. In addition, in spite of advanced analysis techniques available for dynamic analysis of liquid storage tanks such as finite element method and sequential coupling analysis procedure, there is a need to develop a simplified analysis method for practical applications. In this thesis, a simplified method using the generalized single degree of freedom (SDOF) system is proposed for seismic analysis of concrete rectangular liquid containing structures (LCS). Only the impulsive hydrodynamic pressure is considered. In the proposed method, the consistent mass approach and the effect of flexibility of tank wall on hydrodynamic pressures are considered. Different analytical methods are used to verify the proposed model in this study. The comparison of results based on the current design practice, the analytical-finite element models and full finite element model using ANSYS® shows that the proposed method is fairly accurate which can be used in the structural design of liquid containing structures. Parametric studies on seismic analysis of concrete rectangular LCS using the generalized SDOF system are carried out. Five prescribed vibration shape functions representing the first mode shape of fluid structure interaction system are used to study the effect of flexibility of tank wall and boundary conditions. The effect of flexibility of tank wall, the amplitude of hydrodynamic pressure, the added mass of liquid due to hydrodynamic pressure, the effective heights for liquid containing system and the effect of higher modes on dynamic response of LCS are investigated. In addition, the effect of variable size of tanks and liquid depth are studied. The contribution of higher modes to the dynamic response of LCS is included in the proposed model. A design procedure based on the structural model using the generalized SDOF system is proposed in this study. Design charts and tables for the added mass of liquid due to impulsive hydrodynamic pressure and the corresponding effective heights are presented. The proposed design procedure can be used for engineering design applications.

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A Static Nonlinear Procedure for the Evaluation of the Elastic Buckling of Anchored Steel Tanks Due to Earthquakes

Cited by 22 publications

References 19 publications

State-of-the-Art Review on the Seismic Performance Assessment of On-Ground Steel Cylindrical Tanks

State-of-the-Art Review on the Seismic Performance Assessment of On-Ground Steel Cylindrical Tanks

Fragility Curves for Steel Industrial Silos Accounting for Filling Level of Granular-Like Material

Generalized SDOF system for dynamic analysis of concrete rectangular liquid storage tanks

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