Journal of the Korean Society of Hazard Mitigation (한국방재학회 논문집)

Korean Society of Hazard Mitigation (한국방재학회)
권호 표지

Aerodynamic Stability Assessment of PWS and CFRC Hanger Ropes for Suspension Bridge by Experiments

현수교 PWS 및 CFRC 행어로프의 내풍안정성 실험 평가

  • 박형기 (인천대학교 토목환경시스템공학과) ;
  • 강선진 ((주)아름컨설턴트)
  • Published : 2008.12.31
Download PDF
⟨ Previous Next ⟩

Abstract

In this study, to evaluate the aerodynamic stability of suspension bridge hanger ropes, the wind tunnel tests are carried out. It is found that the vortex induced vibration is detected only in single PE-coated PWS cable case. And the wake galloping is occurred in twin cables spaced $3\sim6$ cable diameters of cable center to center when the incidence angle of wind is only zero degree. In case of other incidence angles of wind except zero degree, the wake galloping or the wake flutter are showed in twin cables even outside range of the bounds of $3\sim6$ cable diameters. CFRC cable shows very stable for the twin cables regardless of the distance between two cables, and also for various incidence angles of wind. Thus the characteristic of CFRC rope overwhelms one of PWS cable in aerodynamic stability.

이 연구에서는 현수교 PWS 및 CFRC 행어로프의 바람에 의한 내풍안정성 평가을 위한 풍동실험을 수행하였다. 풍동실험결과, PE관으로 피복된 PWS 케이블은 단일 케이블에서 와류진동이 발생하고 복수 케이블에서는 중심간격이 $3\sim6D$일때 웨이크갤로핑이 발생하였다. 진동이 발생하지 않는 복수 케이블에서도 풍향각이 달라지면 웨이크갤로핑이나 웨이크플러터가 발생함을 알 수 있었다. CFRC 케이블은 케이블 중심간격 및 풍향각에 관계없이 PWS 케이블에 비해 안정된 내풍성능을 보였다.

Keywords

References

  1. 강선진 (2007) 단경간 현수교 행어로프의 내풍성능 개선, 박사학 위논문, 인천대학교
  2. 강선진, 박형기 (2006) 풍하중에 의한 현수교 행어로프 꺽임각에 관한 연구. 한국풍공학회지, 한국품공학회, 제10권, 제2호, pp. 225-231
  3. 近膺舒 (2000) 長大吊橋PWSハソガシステムの構造特性と設計法に 關すゐ硏究. 博士學位論文, 北海道大學大學院
  4. 近藏膺舒, 奧田 基, 河口造二, 山崎武文. (1999) 長大吊橋のPWS ハンガの耐風性關する硏究. 構造工學論文集, Vol. 45A, pp. 1119-1127
  5. 北海道土木技術會鋼道路橋硏究委員會 (1995) 北の名橋再發見. 歐洲 鋼橋技術調査團報告書(1994年度海外調査), pp. 76-77
  6. 竹口昌弘 (2000) 明石海峽大橋のハンガ-ロ-プ制振對策. 本四技報, Vol. 24 No. 93, pp. 18-25
  7. Chen, D., Bao, H., Li, X. and Jing, G.. (2005) The Way to Assess the Status of Cables During Service Period for DFS Yangtze River Bridge (Cablestayed Bridge). IABSE Symposium, Lisbon
  8. Emil S. and Miyata, T. (2006) Design of Building Bridges for Wind. John Wiley & Sons, pp. 230-231
  9. Matsumoto, M., Shiraishi, N., Kitazawa, M., Knisely, C., Shirato, H., Kim, Y. and Tsujii, M. (1990) Aerodynamic Behavior of Inclined Circular Cylinders-Cable Aerodynamics. Journal of Wind Eng- ineering and Industrial Aerodynamics, Amsterdam, Elsevier, Vol. 33, pp. 63-72 https://doi.org/10.1016/0167-6105(90)90021-4
  10. PTI (2000) Recommendation for Stay Cable Design. Test and Installation.
  11. Scanlan R. H. (1996) Wind Effects on Structure, Fundamentals and Alications to Design. Third Edition, John Willey & Sons, Inc
  12. Shiraishi, N., Matsumoto, M. and Shirato, H. (1986) On Aerodynamic In- stabilities of Tandem Strictures. Journal of Wind Engineering and Industrial Aerodynamics, Vol. 23, pp. 437-447 https://doi.org/10.1016/0167-6105(86)90061-9
  13. Simpson, A. (1971) On the Flutter of Smooth Circular Cylinders in a Wake, The Aeronautical Quarterly. pp. 25-41
  14. Yokoyama, S., Sakata, H., Yamakawa, S., Satio, T. and Suzuki, T.. (1977) Wind Induced Oscillation of the Cables of Large Sized Cable-Stated Bridges and Preventive Measures. Technical Review, Mitsubishi Heavy Industrial, Ltd, Vol. 14, No. 3