上海卢浦大桥主桥动力特性测试研究  

MEASUREMENT OF LUPU ARCH BRIDGE VIBRATION CHARACTERISTICS

作　　者：章关永[1] 刘进明[2] 

机构地区：[1]同济大学桥梁工程系,上海200092 [2]北京东方振动与噪声研究所,北京100085

出　　处：《振动与冲击》2008年第9期167-170,177,共5页Journal of Vibration and Shock

摘　　要：介绍上海卢浦大桥(目前世界上最大跨径的钢箱系杆拱桥)的动力特性的测试和分析。现场测试采用环境激励方法,并对测点进行了优化。使用多种先进的OMA模态分析方法对大桥进行了分析和对比,使得模态试验分析结果更为可靠。识别出结构最重要的前12阶模态频率、阻尼比及振型。并和有限元计算结果进行了对比,两者的一致性非常好。进一步讨论了实测结果与空间有限元计算结果之间的异同,并分析了原因。How to measure and analyze the vibration characteristic parameters of Shanghai Lupu Bridge that is the longest span steel box tied arch bridge in the world now is introduced. Ambient vibration method is adopted with optimized measuring locations in the field for modal analysis. The identified parameters are more reliable by using several advanced OMA methods of modal analysis for analysis and comparison. 12 most important modal parameters, such as, modal frequencies, damping ratios and modal shapes are calculated out. Comparisons of the tested results with those from FEM calculations show that they agree quite well. Furthermore, the similarities and the differences between them are discussed, and the causes are analyzed.

关 键 词：大跨度拱桥 桥梁动力特性参数 环境激励模态分析 OMA 

分 类 号：U448.22[建筑科学—桥梁与隧道工程]