Measurement Refinements of Ground-Based Radar Interferometry in Bridge Load Test Monitoring: Comprehensive Analysis on a Multi-Span Cable-Stayed Bridge-Reference-Cited by-同舟云学术

Measurement Refinements of Ground-Based Radar Interferometry in Bridge Load Test Monitoring: Comprehensive Analysis on a Multi-Span Cable-Stayed Bridge

Published:2024-05-24 Issue:11 Volume:16 Page:1882
ISSN:2072-4292
Container-title:Remote Sensing
language:en
Short-container-title:Remote Sensing

Author:

Chen Yaowen¹²³^ORCID,Huang Qihuan¹,Zhang Tingbin³^ORCID,Zhou Ming⁴,Jiang Liming²⁵

Affiliation:

1. School of Earth Sciences and Engineering, Hohai University, Nanjing 211100, China

2. State Key Laboratory of Geodesy and Earth’s Dynamics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430077, China

3. College of Earth and Planet Science, Chengdu University of Technology, Chengdu 610059, China

4. Zhejiang Huadong Mapping and Engineering Safety Technology Co., Ltd., Hangzhou 310014, China

5. University of Chinese Academy of Sciences, Beijing 100049, China

Abstract

This paper presents three refinements in ground-based radar interferometer (GB-radar) measurement for bridge load testing: (1) GB-radar phase jumps were detected for the first time on bridge tower displacement monitoring, and a recovery method is presented to obtain the correct unwrapped value; (2) a precise displacement projection method considering target deformation was exploited, and a case study of the Fifth Nanjing Yangtze River Bridge (FNYRB) GB-radar campaign shows that a centimeter-level compensation can be achieved; (3) a post-construction settlement phenomenon was found during the FNYRB static load tests, characterized by 0.31 mm/min, which accumulated up to 25 mm. In addition, the dynamic monitoring capabilities of GB-radar for the bridge tower and girder were verified, highlighting its potential for bridge structural health monitoring (SHM). The insights gained from this study offer valuable recommendations for future GB-radar bridge displacement monitoring.

Funder

National Natural Science Foundation of China

Key Program of the National Natural Science Foundation of Hubei province

Publisher

MDPI AG

Link

https://www.mdpi.com/2072-4292/16/11/1882/pdf

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