基于不同控制算法的斜拉桥MR阻尼器半主动控制研究——以当今世界最长最宽多塔斜拉桥(嘉绍大桥)为例  

The Research Of Different Control Algorithm Cable-stayed Bridge Under Semi-active Control Based On MRFD——Taking The Longest And Widest Multi Tower Cable-stayed Bridge In The World(Jiashao Bridge) As A Case Study

作　　者：方自奋 FANG Zifen(Hordor Design Group,Xiamen 361004)

机构地区：[1]厦门合立道工程设计集团有限公司

出　　处：《福建建筑》2019年第11期45-51,共7页Fujian Architecture & Construction

基　　金：国家自然科学基金项目(51178100、51208104)

摘　　要：基于Ansys软件平台,建立了浙江嘉绍大桥的有限元基准模型,并对该模型进行考虑地震波剪切波速为1000且输入方式为1(纵桥向)+0.65(竖桥向)的地震作用多点激励输入,采用Matlab对MR阻尼器半主动控制系统进行设计,最后基于ANSYS和MATLAB相互调用的基础上进行基于LQR经典最优控制与独立模态控制分别与限界Hrovat最优控制结合的两种不同控制算法的半主动控制模拟,对两种不同控制方案的控制效果进行分析对比。分析结果证实独立模态半主动控制相对于LQR经典半主动控制能够在较少控制代价的前提上取得更优的控制效果,针对当今世界最长最宽多塔斜拉桥——嘉绍大桥项目工程具有较好的优越性和适用性。Based on ANSYS software platform function benchmark salt bridge finite elementmodel was established,seismic action 1(longitudinal)+0.85(lateral)+0.65(vertical)was applied to the salt bridge,Semi-active control system of MRFD was designed by using MATLAB.Finally,the model was analyzed with semi-activevibration control upon the modalcontrol algorithm combined with limit Hrovat optimal control by using ANSYS and MATLAB calling each other,thenanalyzing.the control effect of two different control methods.The results confirmed that the independent mode semi-active control relative to the LQR classic semi-active control can be obtained in less control costs on the premise of better control effect,which has better superiority and applicability for Jiashao bridge project,which is the longest and widest multi tower cable-stayed bridge in the world.

关 键 词：模态控制算法 LQR 多塔斜拉桥 限界Hrovat控制算法 ANSYS 地震响应 

分 类 号：U441[建筑科学—桥梁与隧道工程]