Analysis of Long-Term Structural Behavior of a Three-Dimensional Self-Anchored Suspension Bridge

In Hwan Bae

doi:10.22725/JSRP.2025.3.2.157

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2025 Vol.3, Issue 2 Preview Page Next Page

Technical Note

Analysis of Long-Term Structural Behavior of a Three-Dimensional Self-Anchored Suspension Bridge 3차원 자정식 현수교의 장기 구조거동 특성 분석

31 December 2025. pp. 157-169

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Abstract

The Yeongjong bridge is a three-dimensional self-anchored suspension bridge that carries both roadway and railway traffic, characterized by its unique structural features. A structural health monitoring system (SHMS) has been developed and installed to verify the effectiveness of the design and to evaluate the structural safety of the bridge. The roadway began operation in December 2000 and railway facilities were installed in 2004, resulting in an increase in dead load. The KTX train operated on the bridge for four years starting in 2014. This study analyzes the long-term time-dependent behavior of the bridge based on SHMS data. Variations in hanger tension forces, decreases in cable-band bolt axial forces, and changes in long-term deformation characteristics during service were analyzed. In addition, the dynamic characteristics of the suspension bridge were analyzed to establish a structural health index (HI) and the corresponding evaluation criteria. The findings indicate that the bridge has maintained satisfactory structural integrity throughout its service.

Keywords

Yeongjong suspension bridge

structural health monitoring system

structural health index (HI)

영종대교 현수교는 도로와 철도 병용의 3차원 자정식 현수교로서 일반교량과는 다른 독특한 구조적 특성을 가지고 있으며, 설계기법의 유효성 검증, 환경 및 하중영향 검토, 구조안전 및 재난관리를 위하여 구조건전도모니터링 시스템(Bridge Health Monitoring System, SHMS)이 구축되어 운영되고 있다. 영종대교는 2000년 12월에 도로부가 준공되었고, 공용중 2004년에 철도레일 설치로 사하중이 증가하였고, 2014년 KTX운행 등 사용환경의 변화를 겪었다. 장기간 계측결과를 근거로 공용중 사용환경 변화에 따른 행어장력특성, 밴드볼트 축력 저하 특성, 장기 형상거동변화특성 등을 규명하였다. 또한 현수교의 동특성 분석을 통하여 구조건전도지수와 평가기준을 수립하였고 평가결과, 구조건전성을 확보하고 있는 것을 확인하였다.

키워드

3차원 자정식 현수교

구조건전도모니터링

구조건전도지수

장기거동특성

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Information

Publisher :Korean Institute of Bridge and Structural Engineers
Publisher(Ko) :한국교량및구조공학회
Journal Title :Journal of Structure Research and Practice
Journal Title(Ko) :한국교량및구조공학회 논문집
Volume : 3
No :2
Pages :157-169
Received Date : 2025-11-11
Revised Date : 2025-11-12
Accepted Date : 2025-11-13
DOI :https://doi.org/10.22725/JSRP.2025.3.2.157

Journal of Structure Research and Practice ISSN:3022-4241(Print) 3022-7267(Online) 한국교량및구조공학회 논문집

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