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本文应用磁流变(MR)阻尼器对桥梁结构在行波激励下的地震反应进行控制。采用子空间模态分析法建立了适合多点不同步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,数值仿真分析了行波激励下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 seismic response of the bridge structure under traveling wave excitation. The subspace modal analysis method is used to establish the instantaneous optimal control algorithm for the bridge vibration control analysis under multi-point unsynchronized seismic excitation. Taking two concrete projects of continuous rigid frame bridge and long-span cable-stayed bridge as examples, the numerical simulation analysis of the effect of bridge seismic response under various MR control strategies under traveling wave excitation is provided, which provides a theoretical basis for engineering application of MR dampers in accordance with.