面向自由车流的悬索桥梁端纵向位移分析与优化控制方法  

Longitudinal girder displacement analysis and optimal control method for suspension bridges under random traffic flow

作　　者：邓超 任远[1] 郭道俊 许翔[1] 樊梓元 叶乔炜 黄侨[1] Deng Chao;Ren Yuan;Guo Daojun;Xu Xiang;Fan Ziyuan;Ye Qiaowei;Huang Qiao(School of Transportation,Southeast University,Nanjing 211189,China;Jiangsu Yangtze River Expressway Passages Management Co.,Ltd.,Nanjing 214200,China;School of Civil Engineering and Architecture,Zhejiang Sci-Tech University,Hangzhou 310018,China;Nanjing Public Project Construction Center,Nanjing 210000,China)

机构地区：[1]东南大学交通学院,南京211189 [2]江苏扬子江高速通道管理有限公司,南京214200 [3]浙江理工大学建筑工程学院,杭州310018 [4]南京市公共工程建设中心,南京210000

出　　处：《东南大学学报（自然科学版）》2024年第5期1223-1230,共8页Journal of Southeast University：Natural Science Edition

基　　金：国家重点研发计划资助项目(2022YFB3706704);中交集团院士专项资助项目(YSZX-03-2022-01-B).

摘　　要：为控制悬索桥的梁端纵向位移,提出了一种黏滞阻尼器和支座联合作用的位移优化控制方法.首先,采用经验小波变换对实测信号进行成分分析;然后,建立自由车流下的悬索桥动力模型,并通过实测数据进行验证;最后,分析黏滞阻尼器和支座对悬索桥梁端纵向位移的影响,采用响应面法对联合作用参数进行优化设计.结果表明,车辆等动力效应引起的位移占梁端纵向位移累计量的94.5%.黏滞阻尼器和支座水平力对位移的影响范围不同,增大黏滞阻尼器阻尼系数或减小阻尼指数能够减小累计位移,而支座水平力影响范围有限.优化黏滞阻尼器和支座联合作用参数可使累计位移减小38%,可提升梁端约束装置服役寿命.To control longitudinal girder displacement of suspension bridges,a displacement optimal control method was proposed by combining viscous dampers with bearings.Firstly,the components of monitored displacement data were analyzed by the empirical wavelet transform(EWT)method.Then,a dynamic model of a suspension bridge was developed and verified by the monitored data.Finally,the effects of viscous dampers and bearings on the longitudinal girder displacement of the suspension bridge were analyzed.The response surface method(RSM)was utilized to optimize the combination parameters.The results show that the dynamic components caused by vehicles account for 94.5%of the cumulative value of the longitudinal girder displacement.The viscous dampers and the horizontal forces of the bearings have different influence ranges.Larger damping coefficients or smaller damping exponents contribute to smaller cumulative values.The bearing horizontal force has a limited influence range.Optimizing the combination parameters of the viscous dampers and bearings can reduce the cumulative displacement by 38%and improve the service life of girder constraint devices.

关 键 词：悬索桥 纵向位移 有限元模型 位移控制 黏滞阻尼器 支座 

分 类 号：U446.3[建筑科学—桥梁与隧道工程]