Simplified Method and Influence Factors of Vibration Characteristics of Isolated Curved Girder Bridge

作     者：Tongfa Deng Junping Zhang Mahmoud Bayat 

作者机构：Guangzhou University-Tamkang University Joint Research Center for Engineering Structure Disaster Preventioand ControlGuangzhou UniversityGuangzhou510006China Jiangxi Provincial Key Laboratory of Environmental Geotechnical Engineering and Disaster ControlJiangxi University of Science and TechnologyGanzhouJiangxi341000China Guangdong Communication PolytechnicGuangzhou510170China Young Researchers and Elite ClubRoudehen BranchIslamic Azad UniversityRoudehenIran 

出 版 物：《Structural Durability & Health Monitoring》 (结构耐久性与健康监测（英文）)

年 卷 期：2018年第12卷第3期

页      面：189-212页

核心收录：

学科分类：081406[工学-桥梁与隧道工程] 08[工学] 0814[工学-土木工程] 082301[工学-道路与铁道工程] 0823[工学-交通运输工程] 

基　　金：This work was financially supported by National Natural Science Foundation of China through Grant 51778471 Scientific Project of Education Department of Jiangxi Province GJJ160620 Science and Technology Project of Communications Department of Jiangxi Province 2016C0006 

主　　题：Seismic isolation curved girder bridge vibration characteristics sensitivity analysis simplified analysis method 

摘      要：The isolated curved girder bridge s vibration characteristics play a major part in the seismic responses of structures and anti-seismic properties.A clear analytic relationship between design parameters and the system s vibration characteristics could be established by its simplified dynamic analysis model,making it convenient for providing a reference to the optimization of design and safety analysis.A double-mass six-degree-of-freedom model for curved girder bridges with isolation bearings installed at the top of the bridge piers is built and a simplified analysis method for the vibration characteristics of the system is *** with the Matlab programming,the influences of radius of curvature,central angle,bridge deck width and damping ratio of the isolation layer and circular frequency of the isolation layer of isolated curved girder bridges on the pseudo-undamped natural circular frequency(called pseudo-frequency for short)and system damping ratio are systematically analyzed,and the sensitivity of vibration characteristics of isolated curved girder bridges is *** results show that the vibration characteristics of isolated curved girder bridges can be reflected well with this simplified model and calculation *** pseudo-frequency of curved girder and system damping ratios increases with the increase of the isolation *** third-order vibration characteristic is more sensitive to the parameters of a curved girder,and the first-order vibration characteristic is sensitive to both central angle and radius of curvature to some extent while insensitive to the width of the bridge ***,the second-order vibration characteristic is not sensitive to the parameters of a curved girder.