高架桥结构参数对基于MR阻尼器半主动控制的影响
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摘要
在地震作用下,高架桥由于其结构特点会产生大幅地震振动,而半主动控制能够有效地控制结构的大幅地震振动.半主动控制一般以被动控制为主体,仅需少量能量用以改变被动控制系统的参数或切换工作状态,以适应系统对最优状态的跟踪.半主动控制往往是针对既有工程结构,所以只能在控制装置和算法上进行改进以达到对既有工程结构的最优控制.为了充分发挥半主动控制的能力,可以考虑从结构设计上进一步提高半主动控制效果.根据高架桥的结构特点,建立了高架桥-MR阻尼器体系的简化模型.在EL-Centro、Taft和Kobe地震波作用下,使用MR阻尼器中修正的宾汉姆模型和剪切型最优控制(Clipped-optimal control)算法对高架桥的半主动地震响应控制进行了研究,分析了结构参数对基于MR阻尼器半主动控制效果的影响.
The characteristics of elevated highway bridges render them selves susceptible to earthquakes.Hence,the semi-active control is usually taken into consideration due to its high level of vibration mitigation.It is known that semi-active control is based upon passive control and only requires lesser energy for adjusting the parameters of passive control system or transferring current working state to track the control system at the optimal state.Semi-active control is generally aimed at the existing engineering structures,thus requiring selecting appropriate control device and corresponding strategy to achieve the optimum control.It is worth pointing out that the performance of semi-active control can be further enhanced by resorting to ameliorating the structural design.According to the characteristics of elevated highway bridges,a simplified model for elevated highway bridges-Magneto-rheological(MR)dampers is developed in this paper.The modified Bingham model for MR dampers and the clipped-optimal control strategy are selected to constitute MR damper based semi-active control for elevated highway bridges under earthquakes.Then,the effects of structure parameters of elevated highway bridges are investigated on MR damper based semi-active control using the EL-Centro,Taft,and Kobe waves.
The characteristics of elevated highway bridges render them selves susceptible to earthquakes.Hence,the semi-active control is usually taken into consideration due to its high level of vibration mitigation.It is known that semi-active control is based upon passive control and only requires lesser energy for adjusting the parameters of passive control system or transferring current working state to track the control system at the optimal state.Semi-active control is generally aimed at the existing engineering structures,thus requiring selecting appropriate control device and corresponding strategy to achieve the optimum control.It is worth pointing out that the performance of semi-active control can be further enhanced by resorting to ameliorating the structural design.According to the characteristics of elevated highway bridges,a simplified model for elevated highway bridges-Magneto-rheological(MR)dampers is developed in this paper.The modified Bingham model for MR dampers and the clipped-optimal control strategy are selected to constitute MR damper based semi-active control for elevated highway bridges under earthquakes.Then,the effects of structure parameters of elevated highway bridges are investigated on MR damper based semi-active control using the EL-Centro,Taft,and Kobe waves.
引文
[1]陈水生,李锦华.磁流变阻尼器对建筑结构地震响应半主动控制分析[J].铁道工程学报,2007(9):40-45.CHEN S S,LI J H.Analyses of Semi-active Control of Earthquake Response to Building Structure by Magneto-rheological Damper[J].Journal of Rail way Engineering Society,2007,(9):40-45.
[2]曾奔,周福霖,黄东阳.土-结构相互作用下考虑平摆耦合的基础隔震体系分析[J].西安建筑科技大学学报:自然科学版,2008,40(4):538-543.ZENG B,ZHOUF L,HUANG D Y.Analysis of coupling effect of translation and rocking on base-isolated system considering soil-structure interaction[J].J.of Xi′an Univ.of Arch.&Tech.(Natural Science Edition),2008,40(4):538-543.
[3]李锦华,陈水生,刘喜辉,等.磁流变阻尼器半主动控制研究综述[J].铁道工程学报,2006(8):88-92.LI J H,CHENS S,LI U X H,et al.Summary of Research on Semi-active Control of Magneto-rheological Damper[J].Journal of Rail way Engineering Society,2006(8):88-92.
[4]邬喆华,陈勇,楼文娟,等.磁流变阻尼器对斜拉索减振效果的试验研究[J].振动工程学报,2004,17(1):102-107.WU Z H,CHEN Y,LOU WJ,et al.Experimental Study of Vibration Mitigation of Bridge Stay Cable Using MR Dampers[J].Journal of Vibration Engineering,2004,17(1):102-107.
[5]周强,瞿伟廉.磁流变阻尼器的两种力学模型和试验验证[J].地震工程与工程振动,2002,22(4):144-150.ZHOU Q,Q WL.Two mechanic models for magneto-rheological damper and corresponding test verification[J].Earthquake Engineering and Engineering Vibration,2002,22(4):144-150.
[6]ERKUS B,ABE M,FUJINO Y.Investigation of semi-active control for seismic protection of elevated highway bridges[J].Engineering Structures,2002,24:281-293.
[7]DYKE S J,SPENCER B F,SAIN M K,et al.Modeling and control of magneto-rheological damper for seismic re-sponse reduction[J].Smart Mater and Structures1996,5:565-575.
[2]曾奔,周福霖,黄东阳.土-结构相互作用下考虑平摆耦合的基础隔震体系分析[J].西安建筑科技大学学报:自然科学版,2008,40(4):538-543.ZENG B,ZHOUF L,HUANG D Y.Analysis of coupling effect of translation and rocking on base-isolated system considering soil-structure interaction[J].J.of Xi′an Univ.of Arch.&Tech.(Natural Science Edition),2008,40(4):538-543.
[3]李锦华,陈水生,刘喜辉,等.磁流变阻尼器半主动控制研究综述[J].铁道工程学报,2006(8):88-92.LI J H,CHENS S,LI U X H,et al.Summary of Research on Semi-active Control of Magneto-rheological Damper[J].Journal of Rail way Engineering Society,2006(8):88-92.
[4]邬喆华,陈勇,楼文娟,等.磁流变阻尼器对斜拉索减振效果的试验研究[J].振动工程学报,2004,17(1):102-107.WU Z H,CHEN Y,LOU WJ,et al.Experimental Study of Vibration Mitigation of Bridge Stay Cable Using MR Dampers[J].Journal of Vibration Engineering,2004,17(1):102-107.
[5]周强,瞿伟廉.磁流变阻尼器的两种力学模型和试验验证[J].地震工程与工程振动,2002,22(4):144-150.ZHOU Q,Q WL.Two mechanic models for magneto-rheological damper and corresponding test verification[J].Earthquake Engineering and Engineering Vibration,2002,22(4):144-150.
[6]ERKUS B,ABE M,FUJINO Y.Investigation of semi-active control for seismic protection of elevated highway bridges[J].Engineering Structures,2002,24:281-293.
[7]DYKE S J,SPENCER B F,SAIN M K,et al.Modeling and control of magneto-rheological damper for seismic re-sponse reduction[J].Smart Mater and Structures1996,5:565-575.
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