| 高架桥梁地震响应模糊半主动控制 |
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| 引用本文： | 陈水生.高架桥梁地震响应模糊半主动控制[J].地震工程与工程振动,2005,25(6):165-171. |
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| 作者姓名： | 陈水生 |
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| 作者单位： | 华东交通大学,土木建筑学院,江西,南昌,330013 |
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| 基金项目： | 江西省自然科学基金（0350061）;江西省教育厅科研专项基金和日本九州工业大学75周年国外合作者研究基金 |
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| 摘 要： | 提出了使用MR阻尼器（Magnetorheological Damper）作为控制设备，以模糊集为基础的半主动控制算法，研究了8种模糊控制规则在高架桥梁地震响应中的控制效果。本文提出的模糊方法的优势在于算法自身的鲁棒性、处理非线性问题的能力和不需要结构的精确数学模型，算法需要的输入变量少，模糊算法的输出直接控制MR阻尼器的输入电压，与LQR-clipped算法不同，MR阻尼器的输入电压可以是零与最大值之间的任意值。根据高架桥梁的结构特点，将典型的墩-支座-桥面结构简化为一个两自由度的线性系统，计算了El Centro地震激励下，MR模糊半主动控制的地震响应，并分别与没有控制及其他控制时的地震响应进行了对比，分析了各种控制算法的控制效果。研究结果表明，MR模糊半主动控制算法可以达到LQR-clipped半主动的控制效果，且模糊控制所需要的控制力较小，为有效地发挥MR阻尼器的功能提供了一种简单的半主动算法。
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| 关 键 词： | 高架桥梁 模糊控制 MR阻尼器 地震响应 |
| 文章编号： | 1000-1301（2005）06-0165-07 |
| 收稿时间： | 2005-04-10 |
| 修稿时间： | 2005-04-102005-07-15 |
Semi-active control based on fuzzy theory of seismic response for elevated highway bridges |
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| Chen Shui-sheng.Semi-active control based on fuzzy theory of seismic response for elevated highway bridges[J].Earthquake Engineering and Engineering Vibration,2005,25(6):165-171. |
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| Authors: | Chen Shui-sheng |
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| Institution: | Department of Civil Engineering, East-China Jiaotong University, Nanchang 330013, China |
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| Abstract: | A semi-active control strategy,in which the MR(Magnetorheological) dampers are used as an actuator,is presented based on the fuzzy set theory.The vibration control effectiveness is analyzed for elevated bridge subjected to seismic excitation using eight styles of fuzzy logical rulers proposed in this paper.The proposed method has some advantage of inherent robustness,and easiness to handle the nonlinear characteristics of the structure,because there is no longer the need for an exact mathematical model of the structure.But few input variables are needed from the vibration sensors that will deal with the difficulty of testing response information of the structure vibration.The output of the present method is directly input to the MR damper as the input voltage.Compared with the LQR-clipped method,in which the MR dampers voltage can only be zero or maximum,the present method can make the voltage for MR dampers obtain the desired value.According to the characteristics of elevated bridges,a two-degree-of-freedom model is provided for the typical pier-bearing-deck structure.As a numerical example,a typical model is analyzed subjected to El Centro seismic record using the MR passive off,passive on,LQR-clipped control strategy and eight styles of fuzzy control methods are proposed.Research results demonstrate that the efficiency of the fuzzy control method is similar to the LQR-clipped control strategy at least.However,the smaller control force will be needed in the present method than the LQR-clipped method.It means that the proposed strategy can promote the efficiency of the MR dampers. |
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| Keywords: | elevated bridges fuzzy logical control MR dampers seismic response |
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