Preprint Article Version 1 NOT YET PEER-REVIEWED

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, Iran
  2. Department of Civil Engineering, Technological Educational Institute of Western Greece, GR-26334 Patras, Greece
Version 1 : Received: 1 December 2016 / Approved: 1 December 2016 / Online: 1 December 2016 (10:36:42 CET)

How to cite: Farajian, M.; Khodakarami, M.; Kontoni, D. Evaluation of Soil-Structure Interaction on the Seismic Response of Liquid Storage Tanks under Earthquake Ground Motions. Preprints 2016, 2016120005 (doi: 10.20944/preprints201612.0005.v1). Farajian, M.; Khodakarami, M.; Kontoni, D. Evaluation of Soil-Structure Interaction on the Seismic Response of Liquid Storage Tanks under Earthquake Ground Motions. Preprints 2016, 2016120005 (doi: 10.20944/preprints201612.0005.v1).

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 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.

Subject Areas

liquid storage tanks; soil-structure interaction; seismic response; earthquake ground motions

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