Probabilistic analysis of seismically isolated elevated liquid storage tank using multi-phase friction bearing

Moeindarbari, Hesamaldin; Malekzadeh, Masoud; Taghikhany, Touraj

doi:10.12989/eas.2014.6.1.111

Cited by 15 publications

(7 citation statements)

References 17 publications

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“…More specifically for the examined three hazard levels: dotted blue curves represent SLE, continuous red curves denote DBE, and dashed black curves correspond to MCE. A similar correlation of isolators' performance with respect to the three hazard levels has been adopted by Moeindarbari et al [17] for TFPBs.…”

Section: Fragility Curvesmentioning

confidence: 76%

“…Moeindarbari et al [17] investigated the efficiency of SFPB and TFPB installed at elevated liquid storage tanks subjected to multihazard level excitations. TFPB is capable of performing multiple level analysis at different hazard scenarios, such as Service Level Earthquake (SLE), Design Basis Earthquake (DBE), and Maximum Credible Earthquake (MCE).…”

Section: Introductionmentioning

confidence: 99%

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Seismic Vulnerability Assessment of Liquid Storage Tanks Isolated by Sliding‐Based Systems

Tsipianitis

Tsompanakis

2018

Advances in Civil Engineering

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Liquid-filled tanks are effective storage infrastructure for water, oil, and liquefied natural gas (LNG). Many such large-scale tanks are located in regions with high seismicity. erefore, very frequently base isolation technology has to be adopted to reduce the dynamic distress of storage tanks, preventing the structure from typical modes of failure, such as elephant-foot buckling, diamond-shaped buckling, and roof damage caused by liquid sloshing. e cost-effective seismic design of base-isolated liquid storage tanks can be achieved by adopting performance-based design (PBD) principles. In this work, the focus is given on slidingbased systems, namely, single friction pendulum bearings (SFPBs), triple friction pendulum bearings (TFPBs), and mainly on the recently developed quintuple friction pendulum bearings (QFPBs). More specifically, the study is focused on the fragility analysis of tanks isolated by sliding-bearings, emphasizing on isolators' displacements due to near-fault earthquakes. In addition, a surrogate model has been developed for simulating the dynamic response of the superstructure (tank and liquid content) to achieve an optimal balance between computational efficiency and accuracy.

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Section: Fragility Curvesmentioning

confidence: 76%

Section: Introductionmentioning

confidence: 99%

Seismic Vulnerability Assessment of Liquid Storage Tanks Isolated by Sliding‐Based Systems

Tsipianitis

Tsompanakis

2018

Advances in Civil Engineering

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“…Many studies have been conducted on this type of isolation system and on other multiple-surface CSSs. [2][3][4][5] However, doubts remain on the efficiency of multiple-surface CSSs for producing torsion effects in the absence of supplementary devices. [6] Castaldo and Tubaldi analyzed the influence of CSS properties on the seismic performance of base-isolated building frames.…”

Section: Introductionmentioning

confidence: 99%

“…A CSS consists of a concave spherical sliding surface and a slider, forming an innovative bearing that achieves damping through friction. Many studies have been conducted on this type of isolation system and on other multiple‐surface CSSs . However, doubts remain on the efficiency of multiple‐surface CSSs for producing torsion effects in the absence of supplementary devices…”

Section: Introductionmentioning

confidence: 99%

Novel procedure for reliability-based cost optimization of seismically isolated structures for the protection of critical equipment: A case study using single curved surface sliders

Moeindarbari

Taghikhany

2017

Struct Control Health Monit

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SummaryThe optimized reliability-based design of seismic isolated structures requires a consideration of the failure probability of the system, in addition to the optimization objectives. The stochastic nature of a given system (e.g., the probable input ground motion) must therefore be properly included in the analysis model. To address this challenge, a novel procedure is developed and examined on a 3-story isolated concrete building model, to minimize the total construction cost of the system with regards to protecting sensitive equipment located within the structure.In this procedure, the structure performance and reliability were first evaluated using time-consuming Monte Carlo simulations. We then employed artificial neural networks as a response surface to facilitate the prediction of the failure probability for the supposed structure. To simulate seismic excitations, we generated artificial ground motion combining random high-frequency and long-period components.Also, a newly developed sensitivity analysis method was used to identify the critical uncertain parameters of the system. Finally, by using a simulated annealing algorithm, we determined the optimal design variables of the structure and isolation system for a range of desired probabilities of failure.The optimal results indicate that, for different target failure probability ranges, some design variables are more significant than others. KEYWORDS base isolation, critical equipment protection, neural network, reliability based cost optimization, sensitivity analysis, spectral non-stationarity

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“…The numerical results proved the high effectiveness of both isolation systems in reducing the seismic responses; however the adoption of FPS rather than HDRB in the seismic isolation of elevated tanks was suggested because of the lower value of vertical sloshing displacements. Moreover, the seismic behavior of the elevated liquid storage tanks isolated by multi-phase friction pendulum systems was investigated (Moeindarbari et al, 2014). The effect of the soil-structure interaction on the seismic behavior of the FPS-isolated structures was also investigated by (Krishnamoorthy and Anita, 2016) using a finite element method.…”

Section: Introductionmentioning

confidence: 99%

Seismic Response of Base Isolated Liquid Storage Tanks under Near Fault Ground Motions

Bagheri¹,

Farajian²

2016

AJTE

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Among the different base isolation systems, the Friction Pendulum System (FPS), whose period does not depend on the weight of the structure, are more appropriate for the isolation of liquid storage tanks. In this paper, the seismic behavior of the cylindrical liquid storage tanks base isolated by FPS is investigated under near-fault ground motions. Such earthquake ground motions have long-period components that may affect the long-period sloshing motion of the liquid. For the required analyses, the isolated tank-liquid system is modeled as three lumped masses known as convective mass, impulsive mass and base mass. The interaction between the fluid and the structure has been taken into account by connecting the liquid masses to the tank wall with specific springs and dampers. Nonlinear time history analyses are carried out to investigate the effects of the isolation period. The results obtained indicate that the friction pendulum system reduces the response parameters of the base isolated tank in comparison with the fixed-base tank.

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Probabilistic analysis of seismically isolated elevated liquid storage tank using multi-phase friction bearing

Cited by 15 publications

References 17 publications

Seismic Vulnerability Assessment of Liquid Storage Tanks Isolated by Sliding‐Based Systems

Seismic Vulnerability Assessment of Liquid Storage Tanks Isolated by Sliding‐Based Systems

Novel procedure for reliability-based cost optimization of seismically isolated structures for the protection of critical equipment: A case study using single curved surface sliders

Seismic Response of Base Isolated Liquid Storage Tanks under Near Fault Ground Motions

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