基于奇异谱分析的钢箱梁桥面GPS数据处理

GPS Data Processing of Steel Box Girder Bridge Deck Based on Singular Spectrum Analysis

本文针对桥面变形具有多周期和趋势性特点,引入奇异谱分析方法,并对奇异谱分解中嵌入维数以及有效主成分的确定等关键技术问题进行了研究。经对苏通大桥钢箱梁桥面2天的数据进行处理与分析,提取了桥面监测数据的周期项与趋势项。结果表明:桥面X、Y、Z三方向上的平均周期为1d,三个方向上变形的幅值不同,但其变形的趋势基本上一致,可以理解为日照、动荷载等引起的周日形变。

In this paper, according to the characteristics of the bridge deck deformation has more cycle and trend, the introduction of singular spectrum analysis method, and the singular spectrum decomposition embedding dimension and determine the main effective components of the key technical problems were studied. Through the processing and analysis of the data of the steel box girder bridge of sutong bridge, the periodical items and trend items of the bridge surface monitoring data are extracted. The results show that the bridge deck X, Y, Z three sides up cycle to an average of 1 d, three directions on deformation amplitude is different, but the deformation trend is basically consistent, can be understood as the sunshine, dynamic loads caused by deformation on Sunday.