Seismic response control of benchmark highway bridge using variable dampers
DSpace at IIT Bombay
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Title |
Seismic response control of benchmark highway bridge using variable dampers
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Creator |
MADHEKAR, SN
JANGID, RS |
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Subject |
structural control-problem
benchmark highway bridge mr damper variable damper friction force scheme two-step friction force scheme |
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Description |
The performance of variable dampers for seismic protection of the benchmark highway bridge (phase I) under six real earthquake ground motions is presented A simplified lumped mass finite-element model of the 91/5 highway bridge in Southern California is used for the investigation A variable damper, developed from magnetorheological (MR) damper is used as a semi-active control device and its effectiveness with friction force schemes is investigated A velocity-dependent damping model of variable damper is used The effects of friction damping of the variable damper on the seismic response of the bridge are examined by taking different values of friction force, step-coefficient and transitional velocity of the damper The seismic responses with variable dampers are compared with the corresponding uncontrolled case, and controlled by alternate sample control strategies The results of investigation clearly indicate that the base shear, base moment and mid-span displacement are substantially reduced in particular, the reduction in the bearing displacement is quite significant The friction and the two-step friction force schemes of variable damper are found to be quite effective in reducing the peak response quantities of the bridge to a level similar to or better than that of the sample passive, semi-active and active controllers
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Publisher |
TECHNO-PRESS
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Date |
2011-08-31T08:33:41Z
2011-12-26T12:59:27Z 2011-12-27T05:51:35Z 2011-08-31T08:33:41Z 2011-12-26T12:59:27Z 2011-12-27T05:51:35Z 2010 |
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Type |
Article
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Identifier |
SMART STRUCTURES AND SYSTEMS, 6(8), 953-974
1738-1584 http://dspace.library.iitb.ac.in/xmlui/handle/10054/12651 http://hdl.handle.net/10054/12651 |
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Language |
en
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