Abstract
Variable curvature pendulum isolator (VCPI) system to isolate the liquid storage tank subjected to earthquake ground motion is proposed in this study. The effectiveness of the proposed system to isolate the tank is studied using a numerical method. Both the tank wall and fluid are modeled using finite element method considering the fluid and wall interaction at the common boundaries. The effectiveness of the proposed system to isolate the tank is studied by comparing the seismic responses of the tank isolated with VCPI system and isolated with FPS isolator. One far-field and three near-fault earthquake ground motions are considered for the study in order to investigate the effectiveness of the proposed system for varied type of earthquake ground motions. From the study, it is concluded that compared to FPS isolator, VCPI system is more effective to reduce the base shear, dynamic pressure and sloshing displacement. The sliding displacement and residual displacement of the tank isolated using VCPI system are more or less similar to that of the tank isolated using FPS isolator.
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Vern S, Shrimali MK, Bharti SD, Datta TK (2021) Attaining optimum passive control in liquid-storage tank by using multiple vertical baffles. Pract Period Struct Des Constr 26(3):04021018
Shrimali MK, Jangid RS (2003) The seismic response of elevated liquid storage tanks isolated by lead-rubber bearings. Bull N Z Soc Earthq Eng 36(3):141–164
Zayas VA, Low SS, Mahin SA (1990) A simple pendulum technique for achieving seismic isolation. Earthq Spectra 6(2):317–333
Lu LY, Wang J, Hsu CC (2006) Sliding isolation using variable frequency bearings for near—fault ground motions, In: Taiwan 2006 proceedings of the fourth international conference on earthquake engineering, Taipei, Taiwan
Shrimali MK (2008) Earthquake response of elevated liquid storage tanks isolated by FPS under bi-direction excitation. Adv Vib Eng 7(4):389–405
Abali E, UcKan E (2010) Parametric analysis of liquid storage tanks base isolated by curved surface sliding bearings. Soil Dyn Earthq Eng 30(1–2):21–31
Seleemah AA, El-Sharkawy M (2011) Seismic response of base isolated liquid storage ground tanks. Ain Shams Eng J 2(1):33–42
Bagheri S, Hayati HR (2017) Seismic performance assessment of FPS isolated liquid storage tanks at various intensity levels. In: Fourth conference on smart monitoring, assessment and rehabilitation of civil structures, Zurich Switzerland
Bagheri S, Farajian M (2018) The effects of input earthquake characteristics on the nonlinear dynamic behavior of FPS isolated liquid storage tanks. J Vib Control 24(7):1264–1282
Shrimali MK (2007) Seismic response of elevated liquid storage steel tanks under bi-direction excitation. Int J Steel Struct 7(4):239–251
Soni DP, Mistry BB, Panchal VR (2011) Double variable frequency pendulum isolator for seismic isolation of liquid storage tanks. Nucl Eng Des 241(3):700–713
Ruifu Z, Dagen W, Xiaosong R (2011) Seismic analysis of a LNG storage tank isolated by a multiple friction pendulum system. Earthq Eng Eng Vib 10(2):253–262
Weng D, Zhang R, Ge Q, Liu S (2012) Effect investigation of combination isolation system for liquid storage tank in different seismic levels. In: PORTUGAL 2012 proceedings of the 15th, world conference on Earthquake Engineering, Lisbon, Portugal
Pranesh M, Sinha R (2000) VFPI:an isolation device for aseismic design. Earthq Eng Struct Dynam 29(5):603–627
Krishnamoorthy A (2011) Variable curvature pendulum isolator and viscous fluid damper for seismic isolation of structures. J Vib Control 17(12):1779–1790
Krishnamoorthy A (2015) Seismic control of continuous bridges using variable radius friction pendulum systems and viscous fluid dampers. J Acoust Vib 20(1):24–35
Housner GW (1963) The dynamic behaviour of water tanks. Bull Seismol Soc Am 53(2):381–387
Haroun MA, Housner GW (1981) Seismic design of liquid storage tanks. J Tech Counc 107:191–207
Wang YL (2005) Seismic analysis and design of steel liquid storage tanks. CSA Acad Perspect 1:20–26
Vern S, Shrimali MK, Bharti SD, Datta TK (2020) Impact of angle of incidence in rectangular liquid storage tanks, Technologies for Sustainable Development, 68–72
Moslemi M, Kianoush MR (2016) Application of seismic isolation technique to partially filled conical elevated tanks. Eng Struct 127:663–675
Zienkiewicz OC (1997) The finite element method. McGraw-Hill Book Company Ltd, New Delhi
Krishnamoorthy A (2021) Finite element method of analysis for liquid storage tank isolated with friction pendulum system. J Earthq Eng 25(1):82–92
Kianousha MR, Chen JZ (2006) Effect of vertical acceleration on response of concrete rectangular liquid storage tanks. Eng Struct 28(5):704–715
Kianoush MR, Ghaemmaghami AR (2011) The effect of earthquake frequency content on the seismic behavior of concrete rectangular liquid tanks using the finite element method incorporating soil–structure interaction. Eng Struct 33(7):2186–2200
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Krishnamoorthy, A., Bhadania, V., Kavyasree, M. et al. Variable curvature pendulum isolator system for seismic isolation of liquid storage tanks. Innov. Infrastruct. Solut. 8, 303 (2023). https://doi.org/10.1007/s41062-023-01281-9
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DOI: https://doi.org/10.1007/s41062-023-01281-9