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Seismic analysis of base-isolated liquid storage tanks

DSpace at IIT Bombay

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Title Seismic analysis of base-isolated liquid storage tanks
 
Creator SHRIMALI, MK
JANGID, RS
 
Subject mathematical models
seismic prospecting
approximation theory
earthquake
 
Description Three analytical studies for the seismic response of base-isolated ground supported cylindrical liquid storage tanks under recorded earthquake ground motion are presented. The continuous liquid mass of the tank is modelled as lumped masses referred as sloshing mass, impulsive mass and rigid mass. Firstly, the seismic response of isolated tanks is obtained using the modal superposition technique and compared with the exact response to study the effects of non-classical damping. The comparison of results with different tank aspect ratios and stiffness and damping of the bearing indicate that the effects of non-classical damping are insignificant implying that the response of isolated liquid storage tanks can be accurately obtained by the modal analysis with classical damping approximation.

The second investigation involves the analysis of base-isolated liquid storage tanks using the response spectrum method in which the peak response of tank in different modes is obtained for the specified response spectrum of earthquake motion and combined with different combination rules. The results indicate that the peak response obtained by the response spectrum method matches well with the corresponding exact response. However, specific combination rule should be used for better estimation of various response quantities of the isolated tanks. Finally, the closed-form expressions for the modal parameters of the base-isolated liquid storage tanks are derived and compared with the exact values. A simplified approximate method is also proposed to evaluate the seismic response of isolated tanks. The response obtained from the above approximate method was found to be in good agreement with the exact response.
 
Publisher Elsevier
 
Date 2009-04-22T09:02:14Z
2011-11-25T21:16:08Z
2011-12-26T13:08:46Z
2011-12-27T05:34:06Z
2009-04-22T09:02:14Z
2011-11-25T21:16:08Z
2011-12-26T13:08:46Z
2011-12-27T05:34:06Z
2004
 
Type Article
 
Identifier Journal of Sound and Vibration 275(1-2), 59-75
0022-460X
http://dx.doi.org/10.1016/S0022-460X(03)00749-1
http://hdl.handle.net/10054/1206
http://dspace.library.iitb.ac.in/xmlui/handle/10054/1206
 
Language en