沪通长江大桥主航道桥超长斜拉索阻尼减振方案比选  

Comparison and Selection of Damping Schemes for Very Long Stay Cables of Main Ship Channel Bridge of Hutong Changjiang River Bridge

作　　者：陈维雄 汪正兴[2,3] 王波[2,3] 柴小鹏[2,3] 

机构地区：[1]沪通长江大桥建设指挥部,江苏南通226000 [2]中铁大桥科学研究院有限公司,湖北武汉430034 [3]桥梁结构安全与健康湖北省重点实验室,湖北武汉430034

出　　处：《桥梁建设》2015年第6期7-11,共5页Bridge Construction

基　　金：中国铁路总公司科技研究开发计划项目(2014G004-B);湖北省青年英才开发计划;武汉市"黄鹤英才计划"~~

摘　　要：针对沪通长江大桥主航道桥斜拉索的动力特性和减振特殊需求,优选适合的阻尼减振方案。对LMD、VSD、ELMD 3种典型阻尼器的减振效果进行室内模型试验研究,结合试验研究结果和实桥斜拉索的特征,设计实桥超长斜拉索的阻尼器安装位置比和安装高度,并以典型斜拉索为例,对不同阻尼器的减振效率和耐久性进行对比分析,最终确定采用优化设计后的ELMD阻尼减振方案。与LMD、VSD相比,ELMD阻尼器的减振效率更高,耐久性更好,可以更有效地控制沪通长江大桥主航道桥超长斜拉索的振动。In the light of the dynamic characteristics and special damping needs of the stay cables of the main ship channel bridge of the Hutong Changjiang River Bridge, the damping scheme that is suitable for applying to the stay cables has been optimally selected. The indoor model test study of the damping effect of the 3 typical dampers of the LMD, VSD and ELMD was made and based on the test study and the characteristics of the stay cables of the actual bridge, the installation positions and installation height of the dampers for the very long stay cables of the bridge were designed. The typical stay cables of several other cable-stayed bridges were taken as the examples, the damping efficiency and durability of the different dampers were comparatively analyzed and it was finally determined that the optimally designed damping scheme of the ELMD should be selected and applied. As compared to the damping schemes of the LMD and VSD, the optimized scheme of the ELMD has higher damping efficiency and better durability and with the optimized scheme, the vibration of the very long stay cables of the bridge can be more effectively controlled.

关 键 词：公路铁路两用桥 斜拉桥 斜拉索 振动控制 阻尼器 模型试验 减振效率 耐久性 

分 类 号：U448.27[建筑科学—桥梁与隧道工程] U441.3[交通运输工程—道路与铁道工程]