Capturing the Deformation Characteristics of Cable-stayed Bridges with Multi-temporal SAR Interferometry

Xiaoqiong Qin, Xiaoli Ding, Mingsheng Liao

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

As an important bridge type across major rivers and straits, cable-stayed bridges are popular around the world because of their structural efficiency and aesthetic appeal. However, they are prone to structural defects due to aging without routine inspection and maintenance. This study reports on the deformation characterization of cable-stayed bridges based on an improved bridge-specific multi-temporal Differential Synthetic Aperture Radar (DInSAR) approach. The proposed method effectively integrates the Point-like Targets (PTs) selection strategies of Persistent Scatterers (PS) and Small Baseline (SBAS) interferometric processing, as well as the specific structural knowledge, into the data processing to maximize the spatial density and accuracy of usable signals. Moreover, the deformation characteristics of cable-stayed bridges were captured by analyzing the time series displacements of damage-sensitive points (DSPs) that identified according to the PTs distribution and deformation patterns along the bridges. The effectiveness of our approach was fairly presented by two case studies including the Haihe Bridge in Tianjin and the Stonecutters Bridge in Hong Kong, and the experimental results were verified by cross-sensor comparison and structural-reliability assessment, showing millimeter level accuracy.

Original languageEnglish
Title of host publication5th International Workshop on Earth Observation and Remote Sensing Applications, EORSA 2018 - Proceedings
EditorsQihao Weng, Paolo Gamba, Ni-Bin Chang, Guangxing Wang, Wanqiang Yao
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781538666425
DOIs
Publication statusPublished - 31 Dec 2018
Event5th International Workshop on Earth Observation and Remote Sensing Applications, EORSA 2018 - Xi'an, China
Duration: 18 Jun 201820 Jun 2018

Publication series

Name5th International Workshop on Earth Observation and Remote Sensing Applications, EORSA 2018 - Proceedings

Conference

Conference5th International Workshop on Earth Observation and Remote Sensing Applications, EORSA 2018
Country/TerritoryChina
CityXi'an
Period18/06/1820/06/18

Keywords

  • Cable-stayed bridge
  • deformation characteristics
  • SAR interferometry
  • time series

ASJC Scopus subject areas

  • Instrumentation
  • Signal Processing
  • Atmospheric Science
  • Earth-Surface Processes

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