Seismic vulnerability assessment of a case study anchored liquid storage tank by considering fixed and flexible base restraints

Kildashti, Kamyar; Mirzadeh, Neda; Samali, Bijan

doi:10.1016/j.tws.2017.11.041

Cited by 38 publications

(14 citation statements)

References 19 publications

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“…The critical PGA values corresponding to a specific probability of exceedance, which may play an important role in the seismic vulnerable evaluation; seismic design purposes were also determined from the fragility curves. Previous studies by Kildashti et al [44], Parool et al [45], and Talaat et al [46] considered 50% probability of exceedance as the acceptance criteria. In this study, in order to consider the safety and the abundance of electrical transformer components in buildings, the value of 40% probability of exceedance was proposed as the acceptance criteria.…”

Section: Fragility Curves and Discussionmentioning

confidence: 99%

Seismic Vulnerability Assessment of Hybrid Mold Transformer Based on Dynamic Analyses

et al. 2019

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In the present study, the seismic vulnerability of a hybrid mold transformer was investigated using a dynamic analytical approach incorporating the experimental results of shaking table tests. The analytical model consisted of linear springs and plastic beam elements, and it has six degrees of freedom simulating the hybrid mold transformer. The dynamic characteristics of the analytical model were determined based on the shaking table tests. The reliability of the analytical model was verified by comparing the test results and analytical results. In order to assess the seismic vulnerability, three critical damage states observed during the shaking table tests were investigated by incorporating the three performance levels specified in ASCE 41-17. Comprehensive dynamic analyses were performed with a set of twenty earthquakes in consideration of the variation of the uncertain parameters (such as the effective stiffness and coil mass) of the mold transformer. Based on the analytical results, fragility curves were established to predict the specified exceedance probability of the mold transformer according to the performance levels.

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Section: Fragility Curves and Discussionmentioning

confidence: 99%

Seismic Vulnerability Assessment of Hybrid Mold Transformer Based on Dynamic Analyses

et al. 2019

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“…However, the liquid storage structure is prone to structural damage and functional damage under previous strong earthquakes. And the resulting indirect loss is far greater than the direct loss [ 2 ]. Different from the analysis of the pier in the outer waters, the coupling between the structure and the inner waters belongs to the internal flow problem [ 3 ].…”

Section: Introductionmentioning

confidence: 99%

Hydrodynamic pressure law of ground-rested circular RC tank under bi-directional horizontal seismic action

et al. 2022

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The research object is the ground-rested circular RC tank. The innovation is to reveal the hydrodynamic pressure law of ground-rested circular RC tanks under bi-directional horizontal seismic action. The relationship between the sloshing wave height and hydrodynamic pressure is determined, the hydrodynamic pressure components and their combination are verified, calculation methods for hydrodynamic pressure are developed, and their distribution laws are presented. The results show that convective hydrodynamic pressure cannot be ignored when the tank is subjected to seismic action. Hydrodynamic pressure under unidirectional horizontal seismic action in X or Y direction is obtained by square root of the sum of impulsive pressure squared and convective pressure squared. Total hydrodynamic pressure under bi-directional horizontal seismic action is obtained by the square root of the sum of X-direction hydrodynamic pressure squared and Y-direction hydrodynamic pressure squared. This method can ensure the accuracy and reliability of hydrodynamic pressure calculation.

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“…Lately, for base-isolated tank, Tsipianitis and Tsompanakis [23] carried out the fragility analysis of tank isolated by sliding-bearing under near-fault earthquakes using a surrogate model. Kildashti et al [24] explored the influence of base flexibility on the seismic performance of fully anchored LST using fragility curve. In summary, there are a large number of researches regarding seismic response of base-isolated tanks and seismic fragility of LSTs.…”

Section: Introductionmentioning

confidence: 99%

Seismic Fragility Assessment of Base-Isolated Steel Water Storage Tank

Zhao¹,

Lu²,

Guo³

et al. 2020

Shock and Vibration

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Steel water storage tanks (WSTs) are among the important components of water treatment industry facilities that are expected to remain functional and applicable after strong earthquakes. In this study, the seismic vulnerability of base-isolated steel WST is investigated. A three-dimensional finite element stick model of the targeted tank is created using OpenSees. This model is capable of reproducing convective, impulsive, and rigid responses of fluid-tank systems. Time-history responses of convective displacement, bearing displacement, and base shear force for base-isolated tank subjected to a typical ground motion are compared. Furthermore, time-history analysis based on a suite of 80 ground motions is conducted. The seismic demand models for various responses are established and the most efficient intensity measure (IM) is determined based on the dispersion and coefficient of determination. Seismic fragility curves for different responses are derived for all three damage states using cloud analysis. The results from this study reveal that (i) the convective displacement is significantly greater than bearing displacement; (ii) peak ground displacement (PGD) is the most efficient and sufficient IM for the targeted tank; and (iii) the characteristic of isolation bearing significantly influences the seismic fragilities of convective displacement and bearing displacement and has a little impact on base shear force, which makes the selection of the proper characteristic parameters for isolation bearing very essential. The analysis technique and procedure mentioned above as well as derived insights are of significance to general liquid storage tank system configuration.

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Seismic vulnerability assessment of a case study anchored liquid storage tank by considering fixed and flexible base restraints

Cited by 38 publications

References 19 publications

Seismic Vulnerability Assessment of Hybrid Mold Transformer Based on Dynamic Analyses

Seismic Vulnerability Assessment of Hybrid Mold Transformer Based on Dynamic Analyses

Hydrodynamic pressure law of ground-rested circular RC tank under bi-directional horizontal seismic action

Seismic Fragility Assessment of Base-Isolated Steel Water Storage Tank

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