基于结构响应测量的结构参数估计

基于结构响应测量的结构参数估计
摘要：对由GPS系统在线监测获取的结构响应数据，进行了分析计算，给出了结构响应的空间分布及与空间位移分布相关联的谱分布，初步分析了结构响应的空间分布及谱分布所隐含的结构性能特征及结构性能变化的可能趋势。研究表明，结构响应的统计分析及谱分析是揭示隐含的结构动力性能特征的可行方法，可以作为估计结构性能差异的指标之一。

关键词：结构响应，时间序列，统计分析，谱分析

Estimation of structural parameters based structural response measured by Global Positioning System
Abstract
For data of all 12 monitoring station sites obtained during field data acquisition by the real-time kinematic Global Positioning System (RTK GPS) in structural health monitoring (SHM) system of the Nanpu Bridge in Shanghai, volume of statistical computations have been finished. The spatial distributions and related spectrum estimations for some monitoring station sites are present. The characteristics of structural performance and tendency of difference of structural performance that implied by the coordinate time series of response have been analyzed. The research indicated that statistical and spectrum analysis of response is a feasible method that may reveal the characters of structural response and statistical characters of structural response may be considered as index for estimation of difference of structural performance.
Key words: Response of structures, Time series, Statistical analysis, Spectrum analysis