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2025 Vol.21, Issue 3 Preview Page

Original Article

Aeroelastic Stability Evaluation of a Cable-Stayed Bridge Considering Attached Added Facilities

교량 첨가시설물을 고려한 사장교의 내풍 안정성 평가

방기정1ㆍ김영진2ㆍ장일영3ㆍ김성겸4*

Ki-Jung Bang1, Young-Jin Kim2, Il-Young Jang3, Seong-Kyum Kim4*

1Ph.D. Student, Department of Civil Engineering, Kumoh National Institute of Technology, Gumi, Republic of Korea
2Director of Research, Korea Concrete Institute, Seoul, Republic of Korea
3Professor, School of Architecture, Civil and Environmental Engineering, Kumoh National Institute of Technology, Gumi, Republic of Korea
4Associate Professor, School of Architecture, Civil and Environmental Engineering, Kumoh National Institute of Technology, Gumi, Republic of Korea
30 September 2025. pp. 718-731
PDF Citation
Abstract
Purpose: This study investigates the aerodynamic stability of a cable-stayed bridge following the installation of a power distribution conduit and a mobile inspection car rail. The evaluation was performed by comparatively analyzing computational fluid dynamics (CFD) results from the original two-dimensional bridge cross-section model and a modified model incorporating these new facilities. Method: The fluid flow was modeled as an unsteady, incompressible flow, governed by the Navier-Stokes equations. Result: The CFD analysis of the modified cross-section yielded a drag coefficient of 1.48. This value represents an approximate 2.8% increase compared to the drag coefficient derived from the CFD analysis of the original cross-section without the additional installations. Conclusion: The calculated drag coefficient of 1.48 remains below the original design value of 1.52, which was used for the initial wind load computations. Consequently, the results confirm that the additional facilities do not necessitate an increase in the originally established wind load.
Keywords
Aerodynamic Stability
Cable-Stayed Bridge
Bridge Attached Facilities
Computational Fluid Dynamic
Aerodynamics Coefficient
연구목적: 사장교의 2차원 단면 교량모델에 대한 원 설계 당시의 전산유동장 해석결과(CFD)와 교량에 배전관로 및 이동식 점검차 레일 첨가 시 2차원 모델의 결과를 상호 비교검토 하여 교량 첨가시설에 따른 사장교의 내풍안정성을 확인하였다. 연구방법: 기류의 해석조건은 비정상, 비압축성기류, 일정 물성치의 특성을 갖는 유동으로 가정하였고, 지배 방정식은 Navier-Stokes 방정식을 사용하였다. 연구결과: 사장교에 배전관로 및 이동식 점검차 레일의 첨가시설에 따른 변경 된 단면에 대한 CFD 해석결과 구해진 항력계수는 1.48로 확인되었고, 배전관로 및 이동식 점검 차 레일 설치 전 단면의 CFD결과에 비해 2.8% 정도로 항력계수 증가가 나타났다. 결론: 원 설계 당시 교량의 보강형 풍하중 산정 시 설계 적용치인 1.52에 비해 작은 값으로 검토 되었다. 실제 설계에 비해 더 작은 값의 항력계수를 갖게 됨으로 풍하중에 대한 추가적인 검토가 필요하지 않다고 판단된다.
키워드
내풍안정성
사장교
교량 첨가시설
전산유체역학
공기력계수
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Information
  • Publisher :The Korean Society of Disaster Information
  • Publisher(Ko) :한국재난정보학회
  • Journal Title :Journal of the Society of Disaster Information
  • Journal Title(Ko) :한국재난정보학회논문집
  • Volume : 21
  • No :3
  • Pages :718-731
  • DOI :https://doi.org/10.15683/kosdi.2025.9.30.718
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