行波激励下MR阻尼器对桥梁地震反应控制效果的研究

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。

Study of Control Effect for Seismic Responses of Bridges under Traveling Wave Excitation Using MR Dampers

In this paper,control for seismic responses of bridges under traveling wave excitation is performed using MR Dampers.The Instantaneous Optimal Control (IOC) algorithm suitability for the vibration control analysis of bridges under the asynchronous multi-support excitations of earthquake is proposed based on the subspace mode analysis method.Take a continuous rigid-framed bridge and a long-span cable-stayed bridge as examples,the control effect for the seismic responses of the bridges excited by traveling wave is numerically simulated under different strategies of MR control,which provides a theoretic reference for the engineering application of the MR damper.