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Effectiveness of seismic isolation for cable-stayed bridges

DSpace at IIT Bombay

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Title Effectiveness of seismic isolation for cable-stayed bridges
 
Creator SONEJI, BB
JANGID, RS
 
Subject vibration
behavior
bearings
systems
cable-stayed bridge
seismic isolation
earthquake
high damping rubber bearing
lead rubber bearing
friction pendulum system
response control
 
Description This paper investigates the effectiveness of elastomeric and sliding types of isolation systems for the seismic response control of cable-stayed bridges. A simplified two-dimensional lumped-mass finite-element model of the Quincy Bay-view Bridge at Illinois was developed for the investigation. The seismic isolation of cable-stayed bridges is achieved using three different isolators, namely, high damping rubber bearings (HDRB), lead rubber bearings (LRB) and friction pendulum system (FPS). Time history analysis is performed for the bridge with four different earthquake ground motions applied in the longitudinal direction using Newmark's method with linear variation of acceleration over the time interval. The seismic response of the isolated cable-stayed bridge is compared with that of the bridge with no isolation system. The results show that the isolation systems are effective for reducing the absolute acceleration of the deck and the base shear response of the tower. Further, a parametric study is performed by varying the damping ratio, yield strength and friction coefficient of HDRB, LRB and FPS to investigate the influence of these parameters on the seismic response of the bridge. From such a study, optimal values can be found for the isolators for reducing the bridge responses.
 
Publisher WORLD SCIENTIFIC PUBL CO PTE LTD
 
Date 2011-09-02T00:32:39Z
2011-12-26T12:59:52Z
2011-12-27T05:52:53Z
2011-09-02T00:32:39Z
2011-12-26T12:59:52Z
2011-12-27T05:52:53Z
2006
 
Type Article
 
Identifier INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS, 6(1), 77-96
0219-4554
http://dx.doi.org/10.1142/S0219455406001836
http://dspace.library.iitb.ac.in/xmlui/handle/10054/12910
http://hdl.handle.net/10054/12910
 
Language en