高架桥地震反应半主动控制分析

Semi-active vibration control analysis of seismic response for elevated highway bridge structures

本文探讨了高架桥结构地震反应LQR(LinearQuadraticRegulator)半主动控制算法以及考虑刚度退化的桥墩非线性计算模型,并利用Matlab语言编制的程序对其进行了数值仿真计算。结果表明,将隔震技术与利用MR阻尼器的半主动控制技术相结合,能够有效地减小高架桥的地震反应;MR阻尼器的设置位置以及结构的参数对控制效果有较大影响。考虑桥墩非线性影响将能得到更为接近实际的计算结果。

In this paper the LQR semi-active control algorithms of seismic response for the elevated highway bridge and the non-linear calculation model of the piers that rigidity degradation is considered are discussed.The numerical simulative calculation is carried out by Matlab program. The results of calculation show that it is effective to reduce the seismic response of the elevated highway bridge structures by combining vibration insulation with semi-active control technique under the earthquake. The locations of MR dampers and structural parameters will influence seriously the effects of structural control. The conclusions that are more similar to reality will be reached if the non-linear affection of piers is considered.