双层钢桁梁桥车桥动力响应与TMD减振研究  

Research on Vehicle-Bridge Dynamic Response& TMD Vibration Reduction of Double Deck Steel Truss Bridge

作　　者：李述慧 LI Shu-hui(Changsha Planning&Design Institute Co.,Ltd.,Changsha 410007,China)

机构地区：[1]长沙市规划设计院有限责任公司,湖南长沙410007

出　　处：《中国市政工程》2018年第2期122-126,138,共6页China Municipal Engineering

摘　　要：以一座简支双层钢桁梁桥为研究对象,分析其在车辆荷载下的动力响应。针对其上层为汽车机动车道、下层为人行及非机动车道的结构特色,采用参数优化后的分布式STMD系统进行振动控制,进而达到行车安全、人行舒适的目的。结果表明:桥梁跨中位移响应冲击系数为1.221,大于规范计算值1.067;分布式STMD系统对简支双层钢桁梁桥车致振动起到控制作用,位移振幅减振率达91.2%;车辆过桥时桥上行人舒适度提升明显,且在不同工况作用下均有较好的改善效果。Taking a simply supported doublelayer steel truss bridge as the research object,its dynamic response under vehicle load is analyzed.In view of the structure characteristics of the upper layer for motor vehicle,the lower layer and the non-motorized lane,the distributed STMD system after parameter optimization is used to control the vibration to achieve the purpose of safety and comfort.The results show that the impact coefficient of the bridge's mid span displacement response is 1.221,which is more than the standard calculation value of 1.067.The distributed STMD system can control the vibration of the simple supported double deck steel truss bridge,and the vibration damping rate of the displacement amplitude is 91.2%,and the pedestrian comfort is significantly improved when the vehicle is crossing the bridge,and it has better effect under different working conditions.

关 键 词：双层钢桁梁桥 车桥耦合振动 冲击系数 TMD 振动控制 舒适度 

分 类 号：U448.211.13[建筑科学—桥梁与隧道工程]