TMD对大跨钢管混凝土拱桥的减震性能研究
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摘要
以某单拱肋钢管混凝土拱桥为原型,通过Midas软件对其有限元模拟并进行动力分析得到该拱桥的动力特性。根据分析结果在主拱肋顶部拟安装TMD系统,分别按照主结构无阻尼和有阻尼两种情况研究该TMD最优参数的取值。对比布置所求参数的TMD前后该拱桥主拱圈顶部在三种不同地震波作用下的位移反应,分析该TMD装置对该拱桥的减震性能。
A single rib concrete-filled steel tubular arch bridge is adopted while a TMD system is to be installed on top of the main arch rib according to the analyzing results of this prototype's dynamic characteristics simulated with FEM software Midas.Researches on the optimal parameter values of the TMD are carried out respectively with and without the damping of the main structure.The performance of TMD on seismic control is analyzed based on the comparison of the displacements of the main arch bridge top under 3 different seismic loads between the original structure and the TMD-installed structure.
A single rib concrete-filled steel tubular arch bridge is adopted while a TMD system is to be installed on top of the main arch rib according to the analyzing results of this prototype's dynamic characteristics simulated with FEM software Midas.Researches on the optimal parameter values of the TMD are carried out respectively with and without the damping of the main structure.The performance of TMD on seismic control is analyzed based on the comparison of the displacements of the main arch bridge top under 3 different seismic loads between the original structure and the TMD-installed structure.
引文
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[4]龙复兴,张旭,顾平,等.调谐质量阻尼器系统控制结构地震反应的若干问题[J].地震工程与工程振动,1996,16(2):87-94(Long Fuxing,Zhang Xu,Gu Ping,etal.Problems in seismic responses of structures under thecontrol of tuned mass dampers(TMD)[J].EarthquakeEngineering and Engineering Vibration,1996,16(2):87-94(in Chinese))
[5]李春祥,刘艳霞,熊学玉.TMD系统最优参数的实用设计方法[J].工业建筑,1999,29(1):30-34(LiChunxiang,Liu Yanxia,Xiong Xueyu.The practicabledesign method of the optimal parameters of TMD system[J].Industrial Construction,1999,29(1):30-34(inChinese))
[6]任晓亮.TLD和TMD减震的优化设计方法及应用[D].合肥:合肥工业大学,2010
[7]JTG/T B02-01—2008公路桥梁抗震设计细则[S].北京:人民交通出版社,2008
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