Stability of elevated liquid-filled conical tanks under seismic loading, Part I—theory

Damatty, Ashraf A. El; Korol, R. M.; Mirza, F. A.

doi:10.1002/(sici)1096-9845(199712)26:12<1191::aid-eqe700>3.0.co;2-g

Cited by 29 publications

(3 citation statements)

References 3 publications

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“…Seismic behavior of elevated conical steel tanks was studied by El Damatty et al (1997B;1997C). In the study, a numerical model was developed in which the tank wall was modeled by shell elements and the fluid effect was considered using the coupled boundary-shell element technique.…”

Section: Response Of Elevated Tanksmentioning

confidence: 99%

Seismic Response of Ground Cylindrical and Elevated Conical Reinforced Concrete Tanks

Moslemi¹

2021

Preprint

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In this study, the seismic performance of concrete ground-supported cylindrical as well as liquid-filled elevated water tanks supported on concrete shaft is evaluated using the finite element method. The effects of a wide spectrum of parameters such as liquid sloshing, tank wall flexibility, vertical ground acceleration, tank aspect ratio, base fixity, and earthquake frequency content on dynamic behaviour of such structures are examined. Furthermore, the adequacy of current practice in seismic analysis and design of liquid containing structures is investigated. A comprehensive parametric study covering a wide range of tank capacities and aspect ratios found in practice today is also carried out on elevated tanks. Two different innovative strategies to reduce the seismic response of elevated tanks are examined, in the first strategy the inclined cone angle of the lower portion of the vessel is increased while in the second strategy the supporting shaft structure is isolated either from the ground or the vessel mounted on top. The results of this study show that capability of the proposed finite element technique. Using this method, the major aspects in the fluid-structure interaction problems including wall flexibility, sloshing motion, damping properties of fluid domain, and the individual effects of impulsive and convective terms can be considered. The effects of tank wall flexibility, vertical ground acceleration, base fixity, and earthquake frequency content are found to be significant on the dynamic behaviour of liquid tanks. The parametric study indicates that the results can be utilized with high level of accuracy in seismic design applications for conical elevated tanks. This study further shows that increasing the cone angle of the vessel can result in a significant reduction in seismically induced forces of the tank, leading to an economical design of the shaft structure and the foundation system. It is also concluded that the application of passive control devices to conical elevated tanks offers a substantial benefit for the earthquake-resistant design of such structures.

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Section: Response Of Elevated Tanksmentioning

confidence: 99%

Seismic Response of Ground Cylindrical and Elevated Conical Reinforced Concrete Tanks

Moslemi¹

2021

Preprint

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“…The first investigation related to the seismic behaviour of conical tanks was conducted by El Damatty et al [5,6]. A finite-boundary element approach that captures the fluid-structure interaction between fluid pressure and the vibration of the walls of the tank was used in these studies.…”

Section: Figure 1 Elevated Conical Tankmentioning

confidence: 99%

Seismic Analysis of Elevated Composite Conical Tanks

Damatty¹,

Ansary²,

Jolie³

2014

Proceedings of 10th World Congress on Computational Mechanics

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“…These configurations can broadly be classified into three primary categories: frame elevated tanks, axisymmetrical pedestal elevated tanks, and composite elevated tanks. Numerous studies have been conducted to develop simplified procedures for a straightforward estimation of the seismic hazard associated with elevated tanks [5,[14][15][16][17][18][19][20][21][22][23]. However, many of these studies often reference three main idealized models, each hinging on the specific simplifications adopted:…”

Section: Introductionmentioning

confidence: 99%

Seismic Design and Evaluation of Elevated Steel Tanks Supported by Concentric Braced Frames

Nascimbene,

Rassati

2024

CivilEng

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The current investigation delved into the seismic analysis, design intricacies, and assessment of the response of elevated steel containment tanks when supported by concentrically braced frames. The primary focus was placed on comprehending the behavior of the supporting structure, recognizing its heightened vulnerability to damage under horizontal excitation—insights gleaned from reconnaissance teams studying earthquake aftermaths worldwide. A specific case study unfolded featuring a steel concentrically braced frame as the supporting structure, aligning with prevalent industry norms. Throughout the entire process, spanning design phases, seismic vulnerability assessments, and response evaluations, special emphasis was placed on the internal fluid sloshing phenomena. This nuanced consideration plays a pivotal role in shaping the dynamic response of the system. The study introduces two distinct design methods: the first method aligns with relevant international codes, while the second method innovatively incorporates the compressive strength of the braces into its approach. To evaluate the dynamic response of the elevated tank, both linear and nonlinear advanced analyses were employed. The comparative analysis of various strategies underscores the impact of the chosen design methodology on the overall system response. This multifaceted exploration aims to contribute valuable insights to the seismic resilience and design optimization of elevated steel containment tanks, furthering the understanding of their performance under seismic forces.

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Stability of elevated liquid-filled conical tanks under seismic loading, Part I—theory

Cited by 29 publications

References 3 publications

Seismic Response of Ground Cylindrical and Elevated Conical Reinforced Concrete Tanks

Seismic Response of Ground Cylindrical and Elevated Conical Reinforced Concrete Tanks

Seismic Analysis of Elevated Composite Conical Tanks

Seismic Design and Evaluation of Elevated Steel Tanks Supported by Concentric Braced Frames

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