地基干涉雷达IBIS-S桥跨结构振动变形测量与模态分析

doi:10.13474/j.cnki.11-2246.2019.0314

测绘通报 ›› 2019, Vol. 0 ›› Issue (10): 35-39.doi: 10.13474/j.cnki.11-2246.2019.0314

地基干涉雷达IBIS-S桥跨结构振动变形测量与模态分析

王鹏¹, 邢诚^2,3, 项霞⁴

1. 苏州科技大学环境科学与工程学院, 江苏苏州 215009;
2. 武汉大学测绘学院, 湖北武汉 430079;
3. 精密工程与工业测量国家测绘地理信息局重点实验室, 湖北武汉 430079;
4. 四川大学水利水电学院, 四川成都 610065

收稿日期:2019-03-17 修回日期:2019-05-08 出版日期:2019-10-25 发布日期:2019-10-26
作者简介:王鹏(1986-),男,博士,讲师,研究方向为精密工程测量技术。E-mail:geomaticpeter@vip.qq.com
基金资助:
国家自然科学基金（41801381）；湖北省自然科学基金（2017CFB654）；江苏省自然科学基金（BK20170379）

Vibration deformation measurement and modal analysis for large bridge span using ground-based interferometric radar IBIS-S

WANG Peng¹, XING Cheng^2,3, XIANG Xia⁴

1. School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China;
2. School of Geodesy and Geomatics, Wuhan University, Wuhan 430079, China;
3. Laboratory of Precision Engineering and Industrial Surveying of National Administration of Surveying, Mapping and Geoinformation, Wuhan 430079, China;
4. College of Water Resource & Hydropower, Sichuan University, Chengdu 610065, China

Received:2019-03-17 Revised:2019-05-08 Online:2019-10-25 Published:2019-10-26

摘要/Abstract

摘要： 地基雷达干涉测量技术能够以较高的时空采样频率获取线性结构目标整体瞬时变形状态。本文将该技术引入大型桥梁桥跨结构的振动变形测量与模态分析中。对动静载试验过程中的武汉二七长江大桥东岸桥跨结构开展连续变形监测，利用频域分解法计算桥跨结构的自振频率、阻尼比和模态振型。计算结果表明，地基干涉雷达干涉测量技术能够快速探测桥跨结构竖弯模态，特别适用于灾后大型线形结构健康状态的应急检测。

关键词: 地基雷达干涉测量, 桥跨结构, 模态分析, 频域分解法, 奇异值分解

Abstract: Ground-based radar interferometry was proposed into vibration deformation measuring and modal analysis of bridge span structure in large-scale bridge which could obtain instantaneous deformation state of the whole linear structure with high sampling frequency. Ground-based interferometric radar IBIS-S was used to monitor structure deformation in the east bank of Wuhan Erqi Yangtze River Bridge under static and dynamic loading. The natural frequency, damping ratio and mode shape were separately calculated using frequency domain decomposition method. Results show that IBIS-S can detect bending modes of large bridges, especially for emergency testing of structure health status after being affected by disasters.

Key words: ground-based radar interferometry, bridge-span structure, modal analysis, frequency domain decomposition, singular value decomposition

中图分类号:

P228

王鹏, 邢诚, 项霞. 地基干涉雷达IBIS-S桥跨结构振动变形测量与模态分析[J]. 测绘通报, 2019, 0(10): 35-39.

WANG Peng, XING Cheng, XIANG Xia. Vibration deformation measurement and modal analysis for large bridge span using ground-based interferometric radar IBIS-S[J]. 测绘通报, 2019, 0(10): 35-39.

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地基干涉雷达IBIS-S桥跨结构振动变形测量与模态分析

Vibration deformation measurement and modal analysis for large bridge span using ground-based interferometric radar IBIS-S

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