斜拉桥主梁应变监测数据分析

周毅;孙利民;闵志华

振动与冲击 ›› 2011, Vol. 30 ›› Issue (4) : 230-235.

PDF(2637 KB)
PDF(2637 KB)
振动与冲击 ›› 2011, Vol. 30 ›› Issue (4) : 230-235.
论文

斜拉桥主梁应变监测数据分析

  • 周毅1;孙利民1;闵志华1
作者信息 +

Analysis of Girder Strain of Cable-Stayed Bridges

  • ZHOU Yi1 ;SUN Limin1 ;MIN Zhihua1
Author information +
文章历史 +

摘要


摘要: 基于健康监测系统的桥梁养护管理是保证其安全运营的重要科学手段,对监测数据进行分析以把握结构的特性和状态是一个必须的环节。结合东海大桥主航道斜拉桥健康监测的工程实践,用经验模态分解(EMD)法对结构健康监测系统实测的跨中应变数据进行了分析。首先将应变数据的动态响应成分和静态响应成分进行了分离。基于动态应变响应识别了结构模态频率,基于静态应变响应获得了过桥车辆数目的信息。结果表明,采用EMD方法可以实现对实测应变动静响应成分的分离,动静响应成分均具有较高的利用价值。



Abstract

Abstract: Strain data measured by the structure health monitoring system of the main navigation channel cable-stayed bridge of Donghai Bridge were analyzed. By using Empirical Mode Decomposition (EMD), a one-hour strain response of the middle section of girder was decomposed into an oscillation component (dynamic response) and a trend component (static response). The structural modal frequencies were obtained from the dynamic strain response and simultaneously the traffic flow was estimated based on the static strain response. It can be concluded that the separation between dynamic response and static response of measured strain by EMD is feasible and these two components are of great value in practice.

关键词

斜拉桥 / 健康监测 / 数据分析 / 经验模态分解 / 应变

Key words

Cable-Stayed Bridge / Health Monitoring / Data Analysis / Empirical Mode Decomposition / Strain

引用本文

导出引用
周毅;孙利民;闵志华. 斜拉桥主梁应变监测数据分析[J]. 振动与冲击, 2011, 30(4): 230-235
ZHOU Yi;SUN Limin;MIN Zhihua. Analysis of Girder Strain of Cable-Stayed Bridges[J]. Journal of Vibration and Shock, 2011, 30(4): 230-235

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