基于光栅阵列传感技术的大跨度斜拉桥风致连续振动响应研究  

Research on Wind induced Continuous Vibration of Large-span Cable stayed Bridges Based on Grating Array Sensing Technology

作　　者：沈伟 龚凯 冯唐政 周敏[2] 应汉雨 Shenwei;Gongkai;Fengtangzheng;Zhoumin;Yinghanyu(Hubei Jiaotou Intelligent Testing Co.,LTD,Hubei,430050,China;Wuhan University of Technology,Hubei,P.R.China 430070,China;Wuhan Feng Li Optics Electricity Technology Co.,LTD,Hubei,420100,China)

机构地区：[1]湖北交投智能检测股份有限公司,湖北430050 [2]武汉理工大学,湖北430070 [3]武汉烽理光电技术有限公司,湖北420100

出　　处：《高科技与产业化》2024年第6期41-43,共3页High-Technology & Commercialization

摘　　要：大跨度斜拉桥为柔性结构,风荷载引起全桥振动的监测十分重要。本文采用光栅阵列振动传感技术,对风荷载作用下大跨度斜拉桥全域振动响应进行研究。通过构建主梁全域监测的光栅阵列传感振动感知网络,对不同风速下桥梁振动状态进行监测。对比了光栅阵列传感光缆与电类拾振器的实测振动信号,然后分析了不同风速下桥梁的全域连续振动响应。实测数据分析表明,光栅阵列振动传感器对桥梁振动频率识别准确可靠,对桥梁主梁全域连续振动响应识别效果较好。Long-span cable-stayed bridges are flexible structures,and it is very important to monitor the vibration of the entire bridge caused by wind loads.The overall vibration response of large-span cable-stayed bridges under wind load is studied based on grating array vibration sensing technology.Firstly,a grating array sensing vibration sensing network for overall monitoring of the main beam is constructed,and then the vibration status of the bridge is monitored under different wind speeds.The measured vibration signals of grating array sensing optical cables are compared with that of the electrical vibration sensors,and then the global continuous vibration response of bridges under different wind speeds are analyzed.The analysis of measured data shows that the grating array vibration sensors are accurate and reliable in identifying the frequency of bridge vibration,and has a good effect on identifying the continuous vibration response of the bridge main beam in the entire domain.

关 键 词：光栅阵列振动传感 全域连续振动 风荷载 桥梁振动 

分 类 号：U441.3[建筑科学—桥梁与隧道工程]