Effect of foundation embedment on seismic behavior of elevated tanks considering fluid–structure-soil interaction

Livaoğlu, Ramazan; Doğangün, Adem

doi:10.1016/j.soildyn.2007.01.008

Cited by 89 publications

(54 citation statements)

References 19 publications

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“…Using state-space method, a MATLAB (MathWorks Inc., Natick, MA, USA) routine is provided to solve the governing equations of motion. The numerical results will be mainly presented in terms of the convective and impulsive displacements relative to the foundation (xc, xi) according to Equations (12) and (13), free vertical surface displacement (dx) according to Equation (14), and the overturning moment (OM) and structural base shear (Fs) according to Equations (15) …”

Section: Governing Equations Of Motionmentioning

confidence: 99%

“…Larkin [13] obtained the responses of steel and concrete liquid storage tanks considering SSI effect, and found that SSI affects the shear force and overturning moment, especially on soft soils. Foundation embedment effects on the behavior of elevated tanks were studied by Livaoglu and Dogangun [14], who concluded that embedment in soft soil significantly affects the tank roof's displacement. Livaoglu [15] shown that decreasing the stiffness of the soil leads to reduction of the base shear and impulsive displacement; on the other hand, sloshing displacement is not considerably affected due to SSI, embedment, and wall flexibility [15].…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of Soil-Structure Interaction on the Seismic Response of Liquid Storage Tanks under Earthquake Ground Motions

2017

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Soil-structure interaction (SSI) could affect the seismic response of structures. Since liquid storage tanks are vital structures and must continue their operation under severe earthquakes, their seismic behavior should be studied. Accordingly, the seismic response of two types of steel liquid storage tanks (namely, broad and slender, with aspect ratios of height to radius equal to 0.6 and 1.85) founded on half-space soil is scrutinized under different earthquake ground motions. For a better comparison, the six considered ground motions are classified, based on their pulse-like characteristics, into two groups, named far and near fault ground motions. To model the liquid storage tanks, the simplified mass-spring model is used and the liquid is modeled as two lumped masses known as sloshing and impulsive, and the interaction of fluid and structure is considered using two coupled springs and dashpots. The SSI effect, also, is considered using a coupled spring and dashpot. Additionally, four types of soils are used to consider a wide variety of soil properties. To this end, after deriving the equations of motion, MATLAB programming is employed to obtain the time history responses. Results show that although the SSI effect leads to a decrease in the impulsive displacement, overturning moment, and normalized base shear, the sloshing (or convective) displacement is not affected by such effects due to its long period.

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Section: Governing Equations Of Motionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Evaluation of Soil-Structure Interaction on the Seismic Response of Liquid Storage Tanks under Earthquake Ground Motions

2017

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“…Larkin [9] obtained the responses of steel and concrete liquid storage tanks considering SSI effect, and found that SSI affects the shear force and overturning moment specially on soft soils. Foundation embedment effects on behavior of elevated tanks were studied by Livaoglu and Dogangun [10], who concluded that embedment in soft soil significantly affects the tank roof's displacement. Livaoglu [11] shown that decreasing the stiffness of the soil leads to reduction of the base shear and impulsive displacement; on the other hand, sloshing displacement is not considerably affected due to SSI, embedment and wall flexibility [11].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Soil-Structure Interaction on the Seismic Response of Liquid Storage Tanks under Earthquake Ground Motions

Farajian

Khodakarami

Kontoni

2016

Preprint

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Soil-structure interaction (SSI) could affect the seismic response of structures. Since liquid storage tanks are vital structures and must continue their operation under severe earthquakes, their seismic behavior should be studied. Accordingly, the seismic response of liquid storage tanks founded on half space soil is scrutinized under different earthquake ground motions. To better comparison, the six considered ground motions are classified based on their pulse like characteristics, into two groups, named far and near fault ground motions. To model the liquid storage tanks, the simplified mass-spring model is used and the liquid is modeled as two lumped masses known as sloshing and impulsive, and the interaction of fluid and structure is considered using two coupled springs and dashpots. The SSI effect, also, is considered using a coupled spring and dashpot. Besides, four types of soils are used to consider wide variety of soil properties. To this end, after deriving the equations of motion, the MATLAB programming is employed to obtain the time history responses. Results show that although the SSI effect leads to decrease the impulsive displacement, overturning moment and normalized base shear, the sloshing (or convective) displacement is not affected by such effects due to its long period.

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“…They concluded that the value of response reduction factor for RC staging tank is significantly influenced by time period, capacity of tank, and seismic zone. The possible serious effects of neglecting soil flexibility and their effects on structural safety have been evaluated by many researchers (Dutta et al 2004;Halabian and Erfani 2013;Livaoglu and Dogangun 2007). Dutta et al (2004) studied the effect of soil flexibility on the dynamic characteristics of RC frame staging tanks having different configurations and concluded that analysis without considering soil flexibility may lead to lower or higher estimation of seismic base shear of RC frame staging tanks considering fluid-structure interaction.…”

Section: Introductionmentioning

confidence: 99%

Development of an integrated remote monitoring technique and its application to para-stressing bridge system

Miyamoto¹,

Motoshita²,

Casas³

2013

Int J Adv Struct Eng

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The seismic design codes/standards of most countries include the nonlinear response of a structure implicitly through a response reduction/modification factor (R). It is the factor by which the actual base shear should be reduced to find the design base shear during design basic earthquake considering nonlinear behavior and deformation limits of structures. In the present study, attempts are made to determine the 'R' factors of four existing RC staging elevated water tanks, which are designed as per draft Indian standards for seismic design of liquid and RC designs and having a ductile detailing considering the effects of soil flexibility. The elevated RC water tanks are analyzed using displacement controlled non-linear static pushover analysis to evaluate the base shear capacity and ductility of tank considering soil flexibility. The 'R' factor is obtained for four realistic designs of elevated RC water tanks having different capacities at two performance levels. The evaluated values of 'R' factor are compared with the values suggested in the design code. The results of the study show that the flexibility of supporting soil has considerable effect on response reduction factor, period and overall performance of water tank, indicating that idealization of fixity at base may be seriously mistaken for soft soils. All the studied water tanks were designed with higher safety margin than that of specified in Indian Standards.

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Effect of foundation embedment on seismic behavior of elevated tanks considering fluid–structure-soil interaction

Cited by 89 publications

References 19 publications

Evaluation of Soil-Structure Interaction on the Seismic Response of Liquid Storage Tanks under Earthquake Ground Motions

Evaluation of Soil-Structure Interaction on the Seismic Response of Liquid Storage Tanks under Earthquake Ground Motions

Evaluation of Soil-Structure Interaction on the Seismic Response of Liquid Storage Tanks under Earthquake Ground Motions

Development of an integrated remote monitoring technique and its application to para-stressing bridge system

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