Abstract：Research purposes : People have paid attention to the large vibration of building structure during earthquake. Magneto-theological dampers have been applied in control of the vibration of civil structure in foreign countries with a perfect achievement. The further theoretical analyses and tests are done for the earthquake response of building structure by magnet-rheological damper for the purpose of widening the application of magnet-theological damper in construction.
Research methods : Through changing the composite parameters of magneto-theological damper(such as the effective length of piston, inner diameter of cylinder and fluid viscosity)，input current and frequency of simple harmonic motion of magneto-rheological damper against cylinder, the analyses are made for the parameters of influencing magneto- theological damper for providing the theoretical basis for better design of magneto-theological damper. Then the analytical researches are done on the semi-active control of earthquake response to building structure with the modified Bouc - Wen Model of magneto-theological damper and Clipped-Optimal Control Method, and the results of semi- active control are compared with the results of semi-passive control of structure.
Research Conclusions : The compared result shows there are different control effects on horizontal displacement and velocity of structure under the effects of EI-centro earthquake and the effects of semi-active control is better than that of passive control in control of horizontal displacement and velocity.
陈水生，李锦华. 磁流变阻尼器对建筑结构地震响应半主动控制分析[J]. 铁道工程学报, 2007, 24(9): 40-45.
CHEN Shui-sheng,LI Jin-hua. Analyses of Semi-active Control of Earthquake Response to Building Structure by Magneto-rheological Damper. 铁道工程学报, 2007, 24(9): 40-45.
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