Journal of the Earthquake Engineering Society of Korea (한국지진공학회논문집)

Earthquake Engineering Society of Korea (한국지진공학회)
권호 표지
DOI QR코드

DOI QR Code

Analytical Method to Determine the Dynamic Amplification Factor due to Hanger Cable Rupture of Suspension Bridges

현수교 행어 케이블 파단에 의한 동적확대계수의 해석적 결정법

  • 나현호 (한국산업안전보건공단 협력지원팀) ;
  • 김유희 (인하대학교 토목공학과) ;
  • 신수봉 (인하대학교 사회인프라공학과)
  • Received : 2014.05.08
  • Accepted : 2014.10.14
  • Published : 2014.11.01
Download PDF
⟨ Previous Next ⟩

Abstract

A suspension bridge is a type of bridge in which the beam is suspended by load-bearing cables. There are two classifications: the self-anchored suspension bridge has the main cable anchored to the bridge girders, and the earth-anchored suspension bridge has the main cable anchored to a large anchorage. Although a suspension bridge is structurally safe, it is prone to be damaged by various actions such as hurricanes, tsunamis and terrorist incidents because its cables are exposed. If damage to a cable eventually leads to the cable rupture, the bridge may collapse. To avoid these accidents, studies on the dynamic behavior of cable bridges due to the cable rupture have been carried out. Design codes specify that the calculated DAF (dynamic amplification factor) should not exceed a certain value. However, it has been difficult to determine DAFs effectively from dynamic analysis, and thus no systematic approach has been suggested. The current study provides a guideline to determine DAFs reliably from the dynamic analysis results and summarizes the results by applying the method to an earth-anchored suspension bridge. In the study, DAFs were calculated at the location of four structural parts, girders, pylons, main cable and hangers, with variations in the rupture time.

Keywords

References

  1. PTI(Post-Tensioning Institute): Recommendations for Stay Cable Design. Testing and Installation. 4th ed. Arizona: PTI, Phoenix; c2001. p. 55-6.
  2. SETRA: CIP recommendations on cable stays; c2002. p. 176-7.
  3. Yoo GM. Analysis of dynamic amplification factor of cable-stayed bridges due to cable rupture. M.Eng. Inha University; c2012.
  4. Nam HS, Lee WS. Analysis on the long span cable stayed bridge about the cable replacement and failure. KSCE 2004 Convention. 2004 Oct; 605-10.
  5. Park YS. (A)Study on the dynamic amplification factor for the evaluation of cable loss effect in a cable-stayed bridge. M.Eng. Seoul National University; c2007.
  6. Ruiz-Teran AM, Aparicio AC. Dynamic amplification factors in cable-stayed structures. Journal of Sound and Vibration. 2007 Feb 20 [Cited 2006 Oct 2];300(1-2):197-216. https://doi.org/10.1016/j.jsv.2006.07.028
  7. Hyttinen E, Valimaki J, Jarvenpaa E, editors. Cable stayed bridges effect, of breaking of a cable. Cable-stayed and Suspension Bridges - Seminar 2: Specific Analysis and Models Proceedings AIPC Conference; 1994 Oct 12-15; Deauville, France; AIPC.
  8. Wolff M, Starossek U. Cable-loss analyses and collapse behavior of cable-stayed bridges. The 5th International Conference on Bridge Maintenance, Safety, Management; 2010 Jul 11-15; Philadelphia, USA: IABMAS.
  9. KSCE.: Design guidelines of cable supported bridges. Korea: Korean Society of Civil Engineers; c2006. p. 176-7.
  10. Giuliani L, Bontempi F. Dynamic analysis for structural robustness evaluation. The 4th International Conference on Bridge Maintenance, Safety, Management; 2008 Jul 13-17; Seoul, Korea: IABMAS.
  11. Starossek U. Collapse resistance and robustness of bridge. The 4th International Conference on Bridge Maintenance, Safety, Management; 2008 Jul 13-17; Seoul, Korea: IABMAS.
  12. Baek HS, Shin YS, Chang JW, Sea YH. Construction Technology of the Yi sun shin Bridge's Pylons with Slip-form Method. Journal of the Korean Society of Civil Engineers. 2011 Mar;59(3):23-32.
  13. Lee SH, Ja GY, Soon DK. Aerodynamic Forces Acting on Yi Sun-sin Bridge Girder According to Reynolds Numbers. Journal of the Korean Society of Civil Engineers. 2013 Jan;33(1):93-100. https://doi.org/10.12652/Ksce.2013.33.1.093