虎门大桥主桥自振特性测定

Test on Vibration Characteristics of Humen Bridge

通过对目前国内已建成的最大跨度之一的悬索桥———虎门大桥的自振特性参数进行现场测试的实例，介绍包括频率及与其对应的振型等自振特性的测定技术．通过与空间结构分析结果进行对比，讨论了实测与计算值之间的一致或差异，并对实测阻尼值作了评估分析．

Vibration characteristics test was carried out on Humen Bridge, which is one of the longest suspension bridge having been built in China. This paper introduces how to measure and determine fundamental vibration parameters, such as dominant frequencies and corresponding mode shapes. In addition, we discuss agreement or disagreement with the results of test and 3D analysis, and finally evaluate the result of damping ratio.