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Behaviour of liquid storage tanks with VCFPS under near-fault ground motions

DSpace at IIT Bombay

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Title Behaviour of liquid storage tanks with VCFPS under near-fault ground motions
 
Creator PANCHAL, VR
JANGID, RS
 
Subject base isolation
liquid storage tank
vibration control
near-fault ground motion
variable curvature friction pendulum system
far-field ground motion
FRICTION PENDULUM SYSTEM
SEISMIC ISOLATION
BASE-ISOLATION
PERFORMANCE
 
Description Earthquake response of slender and broad liquid storage steel tanks isolated with variable curvature friction pendulum systems (VCFPSs) is investigated under near-fault motions. The tanks isolated with VCFPS are idealised with three-degrees-of-freedom associated with convective, impulsive and rigid masses. The frictional forces mobilised at the interface of the VCFPS are assumed to be velocity independent. The governing equations of motion of isolated tank are derived and solved in the incremental form using Newmark's method. For comparative study, the seismic response of liquid storage tanks with the VCFPSs is compared with that of same liquid storage tanks isolated using the friction pendulum systems (FPSs). The seismic response of isolated liquid storage tanks is also compared with that of the non-isolated tanks. Further, a parametric study is carried out to critically examine the behaviour of liquid storage tanks isolated with the VCFPSs. The important parameters considered are the friction coefficient of VCFPS, the fundamental period at the centre of the sliding surface of VCFPS and the tank aspect ratio. It is observed that under near-fault ground motions, the VCFPS is quite effective in controlling the seismic response, viz. the base shear, the sloshing displacement and the impulsive displacement, of liquid storage tanks.
 
Publisher TAYLOR & FRANCIS LTD
 
Date 2014-10-15T13:36:31Z
2014-10-15T13:36:31Z
2012
 
Type Article
 
Identifier STRUCTURE AND INFRASTRUCTURE ENGINEERING, 8(1)71-88
http://dx.doi.org/10.1080/15732470903300919
http://dspace.library.iitb.ac.in/jspui/handle/100/15020
 
Language en