Investigations concerning seismic response control of self-anchored suspension bridge with MR dampers |
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Authors: | Menggang YANG Zhengqing CHEN Jianhua HU |
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Affiliation: | (1) School of Civil and Architecture Engineering, Central South University, Changsha, 410075, China;(2) Wind Engineering Research Center, Human University, Changsha, 410082, China;(3) Hunan Provincial Institute of Transportation Planning, Survey and Design, Changsha, 410008, China |
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Abstract: | To mitigate the seismic response of self-anchored suspension bridges, equations of motion governing the coupled system of
bridge-magneto-rheological (MR) dampers subject to seismic excitation are formulated by employing the phenomenological model
of MR dampers. A corresponding computer program is developed and employed for studying the seismic response control of a self-anchored
suspension bridge with a main span of 350 m. The effect of variable current and number of dampers on seismic response control
is investigated. The numerical results indicate the longitudinal displacement of the tower top and bridge girder decrease
with the increase in input current and number of MR dampers attached longitudinally at the tower-girder connections, and the
internal forces of the tower are effectively attenuated as well. It appears that small electronic current (0.5 A in this study)
may sufficiently attenuate the seismic responses for practical engineering applications.
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Translated from China Civil Engineering Journal, 2006, 39(11): 84–89 译自: 土木工程学报] |
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Keywords: | suspension bridge self-anchored magnetic-rheological (MR) damper seismic response control |
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