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Base isolation for near-fault motions

DSpace at IIT Bombay

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Field Value
 
Title Base isolation for near-fault motions
 
Creator JANGID, RS
KELLY, JM
 
Subject base isolation
base displacement
comparative performance
earthquake
near-fault
optimum damping
superstructure acceleration
 
Description Three analytical studies of base-isolated structures are carried out. First. six pairs of near-fault motions oriented in directions parallel and normal to the fault were considered, and the average of the response spectra of these earthquake records was obtained. This study shows that in addition to pulse-type displacements, these motions contain significant energy at high frequencies and that the real and pseudo-velocity spectra are quite different. The second analysis modelled the response of a model of an isolated structure with a flexible superstructure to study the effect of isolation damping on the performance of different isolation systems under near-fault motion. The results show that there exists a value of isolation system damping for which the superstructure acceleration for a given structural system attains a minimum value under near-fault motion. Therefore, although increasing the bearing damping beyond a certain value may decrease the bearing displacement, it may transmit higher accelerations into the superstructure. Finally, the behaviour of four isolation systems subjected to the normal component of each of the near-fault motions were studied, showing that EDF type isolation systems may be the optimum choice for the design of isolated structures in near-fault locations. Copyright (C) 2001 , Ltd.
 
Publisher JOHN WILEY & SONS LTD
 
Date 2011-08-16T18:59:21Z
2011-12-26T12:55:06Z
2011-12-27T05:43:41Z
2011-08-16T18:59:21Z
2011-12-26T12:55:06Z
2011-12-27T05:43:41Z
2001
 
Type Article
 
Identifier EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS, 30(5), 691-707
0098-8847
http://dx.doi.org/10.1002/eqe.31
http://dspace.library.iitb.ac.in/xmlui/handle/10054/9594
http://hdl.handle.net/10054/9594
 
Language en