Seismic response of liquid storage tanks isolated by sliding bearings

Shrimali, Mahendra Kumar; Jangid, R. S.

doi:10.1016/s0141-0296(02)00009-3

Cited by 109 publications

(47 citation statements)

References 19 publications

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“…The study indicated that the isolation is quite effective in reducing the axial stresses of cylindrical shell. Recently, Shrimali and Jangid [13][14] investigated the response of slender and broad liquid storage tanks under bi-directional earthquake motion to study the interaction effects of restoring forces of the isolators, although the above studies confirm that the seismic isolation is effective in reducing the earthquake response of the ground supported tanks. However, very limited studies were conducted to investigate the effects of seismic isolation on the response of elevated liquid storage tanks.…”

Section: Introductionmentioning

confidence: 99%

Earthquake response of isolated elevated liquid storage steel tanks

Shrimali

Jangid

2003

Journal of Constructional Steel Research

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Earthquake response of elevated liquid storage steel tanks isolated by the linear elastomeric bearings is investigated under real earthquake ground motion. Two types of isolated tank models are considered in which the bearings are placed at the base and top of the steel tower structure. The continuous liquid mass of the tank is modelled as lumped masses known as sloshing mass, impulsive mass and rigid mass. The corresponding stiffness constants associated with these lumped masses have been worked out depending upon the properties of the tank wall and liquid mass. The mass of steel tower structure is lumped equally at top and bottom. Since the damping matrix of the isolated tank system is non-classical in nature, the seismic response is obtained by the Newmark's step-by-step method. The response of two types of tanks, namely slender and broad tanks, is obtained and a parametric study is carried out to study the effects of important system parameters on the effectiveness of seismic isolation. The various important parameters considered are the tank aspect ratio, the time period of tower structure, damping and the time period of isolation system. It has been shown that the earthquake response of the isolated tank is significantly reduced. Further, it is also observed that the isolation is more effective for the tank with stiff steel tower structure in comparison to flexible towers. In addition, a simplified analysis is also presented to evaluate the response of the elevated steel tanks using two-degrees-of-freedom model and two single-degree-of-freedom models. It is observed that the proposed analysis predicts the seismic response of elevated steel tanks accurately with significantly less computational efforts.

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Section: Introductionmentioning

confidence: 99%

Earthquake response of isolated elevated liquid storage steel tanks

Shrimali

Jangid

2003

Journal of Constructional Steel Research

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“…The response spectra of the three earthquake motions for 5 per cent damping are reported in Ref. [15]. Note that the base shear of the isolated liquid storage tanks consists of two components arising from the peak displacement and velocity (refer Eq.…”

Section: Analysis By Response Spectrum Methodsmentioning

confidence: 99%

“…Wang et al [14] investigated the response of liquid storage tanks isolated by FPS system and observed that the isolation was effective in reducing the response of the tanks. Recently, Shrimali and Jangid [15] investigated the seismic response of isolated liquid storage tanks with sliding systems considering the influence of parametric variation and found that the sliding systems were effective in reducing the response. Note that the above studies confirm the effectiveness of base isolation for liquid storage tanks.…”

Section: Introductionmentioning

confidence: 99%

Seismic analysis of base-isolated liquid storage tanks

Shrimali

Jangid

2004

Journal of Sound and Vibration

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“…Substituting (14) into (16) and (19), these two objective indicators can be accurately calculated. A toolbox for integration in MATLAB is used for overcoming the considerable difficulties in performing the integration in (16) and (17). Indicators and can be obtained as the sum of the corresponding index values at different time points by adopting the iterative calculation method and defining the numerical calculation steps.…”

Section: Analytical Modelmentioning

confidence: 99%

“…Based on the observations of several other researchers [7][8][9][10], the failure modes of tank damage can be divided into several types, such as buckling of tank walls, failure of link facilities, spillover of stored liquid, and uplifting of anchorage systems. Strengthening, isolation, and hybrid methods have been promoted by several researchers to ensure that storage tanks are not damaged during earthquakes [11][12][13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Demand-Based Optimal Design of Storage Tank with Inerter System

Zhang

Zhao

2017

Shock and Vibration

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A parameter optimal design method for a tank with an inerter system is proposed in this study based on the requirements of tank vibration control to improve the effectiveness and efficiency of vibration control. Moreover, a response indicator and a cost control indicator are selected based on the control targets for liquid storage tanks for simultaneously minimizing the dynamic response and controlling costs. These indicators are reformulated through a random vibration analysis under virtual excitation. The problem is then transformed from a multiobjective optimization problem to a single-objective nonlinear problem using the -constraint method, which is consistent with the demand-based method. White noise excitation can be used to design the tank with the inerter system under seismic excitation to simplify the calculation. Subsequently, a MATLAB-based calculation program is compiled, and several optimization cases are examined under different excitation conditions. The effectiveness of the demand-based method is proven through a time history analysis. The results show that specific vibration control requirements can be met at the lowest cost with a simultaneous reduction in base shears and overturning base moments.

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Seismic response of liquid storage tanks isolated by sliding bearings

Cited by 109 publications

References 19 publications

Earthquake response of isolated elevated liquid storage steel tanks

Earthquake response of isolated elevated liquid storage steel tanks

Seismic analysis of base-isolated liquid storage tanks

Demand-Based Optimal Design of Storage Tank with Inerter System

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