基于不中断交通运行模态分析的模态挠度法在桥梁状态评估中的应用

林贤坤;张令弥 郭勤涛 覃柏英

振动与冲击 ›› 2013, Vol. 32 ›› Issue (14) : 52-57.

PDF(1634 KB)
PDF(1634 KB)
振动与冲击 ›› 2013, Vol. 32 ›› Issue (14) : 52-57.
论文

基于不中断交通运行模态分析的模态挠度法在桥梁状态评估中的应用

  • 林贤坤1,2 张令弥1 郭勤涛2 覃柏英2
作者信息 +

Application of Modal Deflection Method without Stopping Traffic based on Operational Modal Analysis in Condition Assessment of Bridge

  • Lin Xiankun1,2 Zhang Lingmi1 Guo Qintao2 Qin Boying2
Author information +
文章历史 +

摘要

以张家港河大桥为对象,在不中断交通条件下对该桥实施模态试验,建立和修正其有限元模型,由此对试验模态振型质量归一化。利用振型已质量归一化的试验模态参数,计算该桥已知静荷载作用下的试验模态挠度,通过模态挠度与静挠度实测值的比较、关键问题的仿真研究和模态振型对模态挠度影响的误差分析,探讨和说明了基于不中断交通运行模态分析的模态挠度法在实际工程中应用于桥梁状态评估的可行性与有效性。

Abstract

Zhangjiagang bridge is chosen as research object, its finite element model (FEM) is built and updated based on the results of traffic excitation modal testing without stopping traffic, and applied to obtain the mass-normalized test mode shapes. Using the natural frequencies and mass-normalized mode shapes, the experimental modal deflection values of the given loads were calculated. In virtue of the comparison between the experimental modal deflection values and the measured values of static deflection, simulation study of some key issues and the effect of mode shape error to modal deflection, this paper discussed and represented the feasibility and availability of modal deflection method without stopping traffic based on operational modal analysis (OMA) to condition assessment of the bridge.

关键词

桥梁状态评估 / 模态挠度法 / 不中断交通 / 运行模态分析 / 试验模态振型 / 质量归一化

Key words

Condition Assessment of Bridge / Modal Deflection Method / Without Stopping Traffic / Operational Modal Analysis / Experimental Mode Shape / Mass Normalization

引用本文

导出引用
林贤坤;张令弥 郭勤涛 覃柏英. 基于不中断交通运行模态分析的模态挠度法在桥梁状态评估中的应用[J]. 振动与冲击, 2013, 32(14): 52-57
Lin Xiankun; Zhang Lingmi Guo Qintao Qin Boying. Application of Modal Deflection Method without Stopping Traffic based on Operational Modal Analysis in Condition Assessment of Bridge[J]. Journal of Vibration and Shock, 2013, 32(14): 52-57

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