NDLI: Use of pseudo-negative stiffness dampers for reducing the seismic response of bridges: a benchmark study

Content Provider	Springer Nature Link
Author	Madhekar, S. N. Jangid, R. S.
Copyright Year	2012
Abstract	Seismic response control of the benchmark Highway Bridge with a variable damper employing pseudo-negative stiffness (PNS) control algorithm; referred as PNS damper is investigated under the six earthquake ground motions. PNS damper is used as a semi-active control device. The study is based on the finite-element model of the 91/5 highway bridge located in Southern California. The prime aim of the study is to investigate the effectiveness of PNS damper for seismic response mitigation of the benchmark highway bridge. Numerical simulations are conducted by installing the control devices between the deck-end and abutments of the bridge. The response of the bridge with PNS damper is compared with the corresponding uncontrolled response and the sample controllers. Combined effect of the PNS damper and elastic stiffness of the existing structural member produces a broad hysteresis loop, leading to higher seismic energy dissipation at low control force. From the results of the numerical simulations, it is concluded that PNS dampers are quite effective in reducing the pier base shear, deck displacement, acceleration and bearing displacements, thereby reducing damages during near-fault earthquake ground motions.
Starting Page	1561
Ending Page	1583
Page Count	23
File Format	PDF
ISSN	1570761X
Journal	Bulletin of Earthquake Engineering
Volume Number	10
Issue Number	5
e-ISSN	15731456
Language	English
Publisher	Springer Netherlands
Publisher Date	2012-05-17
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Benchmark highway bridge Pseudo-negative stiffness damper Energy dissipation Elastic member stiffness Geophysics/Geodesy Structural Geology Hydrogeology Civil Engineering Geotechnical Engineering & Applied Earth Sciences Environmental Engineering/Biotechnology
Content Type	Text
Resource Type	Article
Subject	Building and Construction Geophysics Geotechnical Engineering and Engineering Geology Civil and Structural Engineering

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