GPS动态监测中的大跨度桥梁振动特性提取  

Extraction of Vibration Characteristics of Long-span Bridges in GPS Dynamic Monitoring

作　　者：胡卫华 廖福忠 胡冰峰 袁立明[1] HU Weihua;LIAO Fuzhong;HU Bingfeng;YUAN Liming(Zhejiang Surveying and Mapping Team,Hangzhou 310030,China)

机构地区：[1]浙江省测绘大队,浙江杭州310030

出　　处：《测绘与空间地理信息》2021年第8期115-116,121,共3页Geomatics & Spatial Information Technology

摘　　要：GPS高精度实时动态监测技术应用于大跨度桥梁监测成为获取桥梁运行状态和保障桥梁安全的重要手段,受到多种复杂因素的影响,如何提取大跨度桥梁的振动特性是该技术的关键。为了有效提取GPS桥梁振动特性,本文将处理时间观测序列十分优异的傅里叶分析应用于GPS桥梁监测数据处理,根据桥梁实际的振动特性有选择的去除不需要的频率,提取真实的桥梁振动特性。以正在实施监测的桥梁进行实验分析,证明了该方法的有效性,本文的研究为GPS桥梁动态监测数据分析提供了参考。The application of GPS high-precision real-time dynamic monitoring technology to the monitoring of long-span bridges has become an important means to obtain the operating status of bridges and to ensure the safety of bridges.It is affected by many complex factors.In order to effectively extract the vibration characteristics of GPS bridges,this paper applies Fourier analysis,which is an excellent processing time observation sequence,to GPS bridge monitoring data processing.Based on the actual vibration characteristics of the bridge,unnecessary frequencies are selectively removed to extract the true bridge vibration characteristics.The experimental analysis of the bridge under implementation has proved the effectiveness of the method.The research in this paper provides a reference for the analysis of GPS bridge dynamic monitoring data.

关 键 词：GPS 大跨度桥梁 傅里叶分析 振动特性 

分 类 号：P228.4[天文地球—大地测量学与测量工程]