This paper introduces an improved isolation system for aboveground storage tanks (ASTs). In this system, the tank shell is supported by a ring of vertical isolation systems (VIS) that dampen the rocking motion of the tank shell caused by dynamic loads. On the other hand, the forces in the vertical direction caused by the overturning moment are isolated as an alternative to the common horizontal system used for shear base isolation of ASTs. The effects of the proposed vertical isolation system on the seismic responses of the contained liquid are examined using various tank dimensions and earthquake ground motions. The finite element model (taking into account fluid-structure interaction effects) is used to simulate the contained liquid, as well as the tank shell. The results indicate that the new system could efficiently reduce the main seismic design parameters of the tanks, including base shear, overturning moment, and seismic stress in the tank shell. The sloshing wave height, however, is not significantly affected.
Chalhoub M.S. and Kelly J. (1990). âShake table test of cylindrical water tanks in base isolated structuresâ, Journal of Engineering Mechanics, 11, 6(7), 1451â72.
Kim NS. and Lee DG. (1995). âPseudodynamic test for evaluation of seismic performance of base-isolated liquid storage tanksâ, Engineering Structures, 17,198â208.
Park J.H., Koh H.M. and Kim J.K. (2000). âSeismic isolation of pool-type tanks for the storage of nuclear spend fuel assembliesâ. Nuclear Engineering and Design,199,143â54.
Wang YP., Teng MC. and Chung KW. (2001). âSeismic isolation of rigid cylindrical tanks using friction pendulum bearings.â Earthquake Engineering and Structural Dynamics, 30(7), 1083â1099
Shrimali M.K. and Jangid, R.S. (2002). âSeismic response of liquid storage tanks isolated by sliding bearingsâ, Engineering Structures 24 907â919.
Shrimali MK and Jangid RS., (2004). âSeismic analysis of base isolated liquid storage tankâ, Journal of Sound and Vibration; 275( 1-2): 59-75.
Cho KH, Kim MK, Lim YM and Cho SY. (2004), âSeismic response of base-isolated liquid storage tanks considering fluidâstructureâsoil interaction in time domainâ. Soil Dynamics and Earthquake Engineering, 24:839â52.
Jadhav MB. and Jangid RS. (2004). âResponse of base-isolated liquid storage tanksâ. Shock and Vibration, 11 (2004) 33â45.
Shekari MR, Khaji N and Ahmadi M.T.A. (2009). âcoupled BEâFE study for evaluation of seismically isolated cylindrical liquid storage tanks considering fluidâstructure interactionâ. Journal of Fluids and Structures; 25: 567â85.
Abali E and Uçkan A. (2010). âParametric analysis of liquid storage tanks base isolated by curved surface sliding bearingsâ. Soil Dynamics and Earthquake Engineering; 30:21â31.
Panchal VR and Jangid RS. (2011). âSeismic Response of Liquid Storage Steel Tanks with Variable Frequency Pendulum Isolatorâ, KSCE Journal of Civil Engineering; 15(6): 1041-1055.
Soni DP, Mistry BB and Panchal VR. (2011). âDouble variable frequency pendulum isolator for seismic isolation of liquid storage tanksâ, Nuclear Engineering and Design; 241:700â13.
Zhang R., Weng D. and Ren X. (2011). âSeismic analysis of a LNG storage tank isolated by a multiple friction pendulum system.â Earthquake Engineering and Engineering Vibration, 10(2), 253â262.
Vosoughifar H, and Naderi M. (2014). âNumerical analysis of the base-isolated rectangular storage tanks under bi-directional seismic excitation.â British Journal of Mathematics & Computer Science, 4(21), 3054â3067.
Cheng X., Jing W. and Gong L. (2017). âSimplified Model and Energy Dissipation Characteristics of a Rectangular Liquid-Storage Structure Controlled with Sliding Base Isolation and Displacement-Limiting Devicesâ, Journal of Performance of Constructed Facilities, 2017, 31(5): -1â1.
American Petroleum Institute API, 1998 âWelded Storage Tanks for Oil StorageâAPI 650, American Petroleum Institute Standard, Washington D.C.
Goudarzi MA, Sabbagh-Yazdi SR and Marx W. (2010). âSeismic analysis of hydrodynamic sloshing force on storage tank roofâ, Earthquake Spectra; 26(1):131-152.
Moeini, M., Nikomanesh, M. R., & Goudarzi, M. A. (2019). Vertical Isolation of Seismic Loads in Aboveground Liquid Storage Tanks. Journal of Seismology and Earthquake Engineering, 21(1), 45-53. doi: 10.48303/jsee.2019.240806
MLA
Morteza Moeini; Mohammad Reza Nikomanesh; Mohammad Ali Goudarzi. "Vertical Isolation of Seismic Loads in Aboveground Liquid Storage Tanks". Journal of Seismology and Earthquake Engineering, 21, 1, 2019, 45-53. doi: 10.48303/jsee.2019.240806
HARVARD
Moeini, M., Nikomanesh, M. R., Goudarzi, M. A. (2019). 'Vertical Isolation of Seismic Loads in Aboveground Liquid Storage Tanks', Journal of Seismology and Earthquake Engineering, 21(1), pp. 45-53. doi: 10.48303/jsee.2019.240806
VANCOUVER
Moeini, M., Nikomanesh, M. R., Goudarzi, M. A. Vertical Isolation of Seismic Loads in Aboveground Liquid Storage Tanks. Journal of Seismology and Earthquake Engineering, 2019; 21(1): 45-53. doi: 10.48303/jsee.2019.240806