摘要
介绍一种相对简单而实用的基于环境激励的大跨度桥梁模态测试分析方法,该方法仅利用结构的动态响应信号作频谱分析即可获得模态频率、振型、阻尼等主要模态参数,处理速度快,并且结果直观可靠.通过对广东金马大桥斜拉桥的实桥测试,证明该方法应用于工程实际是完全可行的.
This paper presents the theory and methodology of a relatively simple and practical modal test approach based on ambient excitation for long span bridges. In this approach, some fundamental parameters, such as mode shapes and their corresponding frequencies as well as the damping ratios, can be found by a fast process of spectra analysis of the measured response signal. Also, its results are direct and reliable. The successful practices of the modal test on Guangdong Jinma Cable-stayed Bridge shows that the method is valid.
出处
《广东工业大学学报》
CAS
2005年第1期100-104,共5页
Journal of Guangdong University of Technology
关键词
环境激励
模态试验
金马大桥
ambient excitation
modal test
Jinma Bridge