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本文应用磁流变(MR)阻尼器对桥梁结构在一致地震激励下的响应进行控制。采用子空间模态分析法建立了适合一致地震激励下桥梁振动控制分析的瞬时最优控制算法。以连续刚构桥和大跨度斜拉桥两个具体工程为例,数值仿真分析了桥梁地震反应在多种MR控制策略下的控制效果,为MR阻尼器的工程应用提供了理论依据。
In this paper, the MR damper is used to control the response of the bridge structure under the uniform earthquake excitation. The subspace modal analysis method is used to establish an instantaneous optimal control algorithm for bridge vibration control analysis under uniform earthquake excitation. Taking the two concrete projects of continuous rigid frame bridge and long-span cable-stayed bridge as examples, the control effect of bridge seismic response under various MR control strategies is analyzed numerically, which provides a theoretical basis for the engineering application of MR damper.