Liquid storage tanks under vertical excitation
Until recently, the hydrodynamic effects on liquid storage tanks induced by an earthquake excitation were basically treated for the horizontal component of the earthquake. Recent studies, however, showed that the hydrodynamic effects due to the vertical component of an earthquake may be significant. In these studies the tank is assumed to be fixed at the bottom. This paper is concerned with the hydrodynamic behavior of liquid storage tanks induced by vertical earthquake input excitation. First, the fluid-tank system is treated as a fixed-base system and a simple formula is obtained for the coupled fluid-structure natural frequency. Second, additional interaction effects due to the foundation flexibility on the fluid-tank system are investigated. It is concluded that the foundation flexibility may have a significant effect on the hydrodynamic behavior of the liquid storage tanks under a vertical ground shaking.
- Research Organization:
- Brookhaven National Lab., Upton, NY (USA)
- DOE Contract Number:
- AC02-76CH00016
- OSTI ID:
- 5559208
- Report Number(s):
- BNL-NUREG-36472; CONF-850670-19; ON: TI85012188
- Country of Publication:
- United States
- Language:
- English
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42 ENGINEERING
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CONTAINERS
EARTHQUAKES
EQUATIONS
FLEXIBILITY
FLUID MECHANICS
FOUNDATIONS
HYDRODYNAMICS
MECHANICAL PROPERTIES
MECHANICAL STRUCTURES
MECHANICS
MOTION
NUMERICAL SOLUTION
SEISMIC EFFECTS
SEISMIC EVENTS
STORAGE FACILITIES
SUPPORTS
TANKS
TENSILE PROPERTIES