一种对公路桥梁振动半主动控制的新策略

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一种对公路桥梁振动半主动控制的新策略

马涌泉

东南大学

收稿日期:2013-11-28 修回日期:2013-12-25 发布日期:2014-09-12
通讯作者: 马涌泉

Southeast University

Received:2013-11-28 Revised:2013-12-25 Published:2014-09-12

摘要/Abstract

摘要： 为了有效抑制隔震桥梁震后过大的梁体及支座位移，本文提出了一种适合MRD的基于力反馈(FF)形式的半主动控制策略。本文首先提出了采用隔震装置提供的恢复力作为主要反馈信号的半主动控制策略，并采用逆模型计算出施加于MRD的指令电流。然后给出了欲使MRD产出预期阻尼力而应施加的电流准则。最后设计出基于力反馈形式的半主动闭环控制系统。分别采用Passive-on、Passive-off、FF和CO等四种控制算法对一座三跨隔震连续梁桥的各评价指标进行了数值分析。结果表明：FF算法对梁体位移、支座位移和墩底剪力的控制效果要比其它三种算法的显著；FF算法比CO算法更有利于MRD性能的发挥；FF算法的鲁棒性要明显优于CO算法。

关键词: 公路桥梁, 磁流变阻尼器, 逆模型, 力反馈, 半主动控制

马涌泉. 一种对公路桥梁振动半主动控制的新策略[J]. .

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