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Computation 2017, 5(1), 17; doi:10.3390/computation5010017

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

1
Faculty of Civil Engineering, Semnan University, Semnan, 35131-19111, Iran
2
Department of Civil Engineering, Technological Educational Institute of Western Greece, GR-26334 Patras, Greece
*
Authors to whom correspondence should be addressed.
Academic Editor: Demos T. Tsahalis
Received: 1 December 2016 / Revised: 15 February 2017 / Accepted: 9 March 2017 / Published: 12 March 2017
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Abstract

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. View Full-Text
Keywords: liquid storage tanks; soil-structure interaction; seismic response; earthquake ground motions liquid storage tanks; soil-structure interaction; seismic response; earthquake ground motions
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Farajian, M.; Khodakarami, M.I.; Kontoni, D.-P.N. Evaluation of Soil-Structure Interaction on the Seismic Response of Liquid Storage Tanks under Earthquake Ground Motions. Computation 2017, 5, 17.

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