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Nonlinear Seismic Analysis of Concrete Rectangular Storage Tanks Considering Soil-Structure-Interaction

Asareh, Iman | 2010

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 41089 (09)
  4. University: Sharif University Of Technology
  5. Department: Civil Engineering
  6. Advisor(s): Khalu, Alireza
  7. Abstract:
  8. Liquid storage tanks as part of the lifeline facilities play an important role in the rescuer work and drinking water supply after earthquakes. Importance of these structures demonstrates the need for investigating their dynamic behavior under dynamic loading. To assure the safety of liquid storage tanks, the dynamic response of liquid storage tanks has been studied intensively in the past. Housner proposed a widely used analytical model in which the hydrodynamic pressures are separated into impulsive and convective components. This model is mostly used for the horizontal groud motion. In this study, considering soil-structure interaction (SSI), nonlinear dynamic behavior of concrete rectangular tanks and nonlinear dynamic behavior of soils has been investigated. The effects of different parameters such as the fluid level in tanks, their flexibility and different parameters in Drucker-Prager plastic model have been studied. The Endurance Time (ET) method is a time-history based dynamic pushover procedure for seismic analysis and design of structures. In this procedure, structures are subjected to a specially designed intensifying accelerogram and their Endurance Time is measured based on the time intervals during which they can resist the imposed dynamic actions. In this study, ET method is used for analysis of rectangular tanks. For this purpose ABAQUS program has been used for numerical analysis and it’s springs and dashpoints for mechanical models are used for liquid-structure interaction and viscous boundary. Among the most importance issues in numerical part was the placement
  9. Keywords:
  10. Seismic Non-Linear Analysis ; Added Mass ; Soil-Structure Interaction ; Concrete Tanks ; Endurance Time Method ; Drucker-Prager Yield Surface

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