DOI QR코드

DOI QR Code

A Study on the Characteristics of Dynamic Behaviors for Continuous PSC Girder Bridges with Integral Pier Cap

교각일체형 연속 PSC 거더교의 동적거동 특성 연구

  • 정영도 ((주)포스코건설 R&D Center 기술연구소) ;
  • 구민세 (인하대학교 토목공학과) ;
  • 이성태 (인하공업전문대학 토목환경과) ;
  • 김희성 (동서대학교 건축토목공학부 토목공학전공)
  • Received : 2012.11.08
  • Accepted : 2012.12.05
  • Published : 2013.01.30

Abstract

Recently, the construction industry has been changed in such a way that the cost for bridge construction should be optimized or reduced. Therefore, bridges are required be cost-effective in terms of initial construction as well as in the maintenance during service stage. In order to reduce the cost for bridge construction, the Rahmen typed structure, in which the bridge components from superstructure to substructure are integral, has many advantages to reduce the size of structural members including girders, since the loadings from superstructure may be transferred to substructure through the connecting rebars such as stud, etc. This paper studied on the continuous Up and Down Prestressed Concrete (UD PSC) girder bridge in which the reinforced concrete pier cap is integral with the part of girders in superstructure. In previous studies, it is known that the structural behavior of continuous UD PSC girder bridge is quite different compared to the one of the bridges with conventional bearings or shoes to support the loading from girders. Nevertheless, it has hardly been studied about the structural behavior of bridge with UD PSC girder. Therefore, in this study, various dynamic behaviors of continuous UD PSC girder bridge with integral pier cap have been analyzed using numerical method. Furthermore, an equation to evaluate the impact factor is suggested for the UD PSC girder bridge which has two to three continuous spans.

건설환경의 지속적인 변화로 인하여 교량 건설비용의 최소화뿐만 아니라 공용기간중의 유지관리를 포함한 전체 비용의 최소화 및 최적화의 요구가 증가하고 있다. 이러한 이유로 교량의 상부구조에서 하부구조로 힘을 전달하기 위해 사용되는 교량받침 대신에 스터드나 연결철근 등과 같은 연결재를 사용하여 교량의 상부구조와 하부구조를 라멘식으로 일체화 시킨 교량형식이 제시되고 있다. 이 논문은 교량의 상부구조 형식을 연속 UD PSC 거더로 하여 철근콘크리트 교각과 일체화 시킨 교각일체형 연속 UD PSC 거더교를 대상으로 한다. 교각일체형 연속 UD PSC 거더교는 라멘교 형식과 거더교 형식을 결합한 교량으로 일반 받침형식의 교량과 상이한 거동특성을 나타낸다. 하지만 거동 특성에 대해 명확히 규명되어 있지 않다. 따라서 본 논문에서는 해석적 방법을 이용하여 교각일체형 연속 UD PSC 거더교의 동적거동 특성을 분석하고 2, 3경간 교각일체형 연속 UD PSC 거더교에 적용할 수 있는 충격계수 산정식을 제시하였다.

Keywords

References

  1. Cho, K. H., "The formulas of impact factors using the speed parameters on a steel box girder bridge", Master's Degree Dissertation, Seoul National University of Science and Technology, Korea, 2004. (in Korea)
  2. Jeong, J. K., "Impact formulas for two span continuous PSC railway bridge", Master's Degree Dissertation, INHA University, Korea, 2002. (in Korea)
  3. Kim, H. H., "Development of Design Method in Continuous PSC Girder Bridges using Up and Down of Supports", Ph. D. Dissertation, INHA University, Korea, 2009. (in Korea)
  4. Kim, M. S., "Impact formulas for simple-span preflex composite girder bridges under moving vehicles", Master's Degree Dissertation, INHA University, Korea, 2000. (in Korea)
  5. Kim, S. S., "The behavior of 3span continuous PSC beam bridge with a monolithic pier joints", Master's Degree Dissertation, INHA University, Korea, 2004. (in Korea)
  6. Korea Road & Transportation Association, Design Criteria for Highway bridge, 2010. (in Korea)
  7. Kyung, K. S., Lee, H. H., Jeon, J. C., Cho, K. H., "A Study on Structural Behaviour at Ridge Connection of Rahmen-Type Hybrid Bridge", Journal of Korea Society of Civil Engineering, vol. 23, No. 4A, 2003, pp.687-694. (in Korea)
  8. Lee, J. S., "The bridge behavior analysis by means of time history analysis according to the Vehicle velocity", Master's Degree Dissertation, Chungbuk National University, Korea, 2004. (in Korea)
  9. Senthilvasan, J., Brameld, G. H., Thambiratnam, D. P., "Bridge-vehicle interaction in curved box girder bridges", Journal of Microcomputers in civil engineering, vol. 12, No. 3, 1997, pp.171-181. https://doi.org/10.1111/0885-9507.00054
  10. Y. B. Yang, S. S. Liao, B. H. Lin, "Impact Formulas for Vehicles Moving over Simple and Continuous Beams", Journal of Structural Engineering, vol. 121, No. 11, 1995. pp.1644-1650. https://doi.org/10.1061/(ASCE)0733-9445(1995)121:11(1644)