DOI QR코드

DOI QR Code

Numerical Analysis Models for Jointless Bridges Through Sensitivity Analysis

민감도 해석을 통한 무조인트 교량의 수치해석 모델 제안

  • Noh, Chi-Oug (Deparment of Civil Engineering, Pukyong National University) ;
  • Kim, Seung-Won (Deparment of Civil Engineering, Pukyong National University) ;
  • Lee, Hwan-Woo (Deparment of Civil Engineering, Pukyong National University) ;
  • Nam, Moon-Seok (Expressway & Transportation Research Institute, Korea Expressway Corp)
  • 노치욱 (부경대학교 토목공학과) ;
  • 김승원 (부경대학교 토목공학과) ;
  • 이환우 (부경대학교 토목공학과) ;
  • 남문석 (한국도로공사 도로교통연구원)
  • Received : 2021.07.09
  • Accepted : 2021.07.26
  • Published : 2021.08.31

Abstract

In this study, a jointless bridge that integrates the superstructure and abutment without installing an expansion joint was analyzed. An example of a jointless bridge that has been introduced in Korea since 2009. Owing to the short period of use and lack of experience in design, construction, and maintenance, there is insufficient information regarding the long-term behavior of jointless bridges. When analyzing numerous bridges, the numerical analysis model must maintain the numerical values used and ensure the convenience of model construction. In this study, sensitivity analysis was performed to select a numerical model for various types of jointless bridges using commercial finite element programs, MIDAS Civil and ABAQUS 2018. According to a solid element-based model, we analyzed the mean and maximum relative errors between structural models. Consequently, it was found that the beam element-based model exhibits a significantly small relative error in comparison to the shell element, where a relatively large error was recorded. Therefore, the optimal numerical analysis model, a practical model that maintains the similarity and precision of the displacement shape cause by relative error, was judged to be the most suitable for jointless bridges based on the shell element.

본 연구의 대상은 신축이음장치를 설치하지 않고 상부구조와 교대를 일체화하는 무조인트 교량이다. 무조인트 교량은 국내에 2009년 이후 본격적으로 도입되었다. 공용기간이 짧고 설계, 시공 및 유지관리 경험이 부족하여 장기거동에 대한 신뢰도가 아직은 부족하다. 수치해석을 통해 다수의 교량을 분석하는 경우 수치해석 모델은 안정적인 정확성 유지와 모델 구축의 편의성이 확보되어야 한다. 본 연구에서는 다양한 형식을 가진 무조인트 교량의 수치해석 모델을 선정하기 위해 민감도 해석을 수행하였다. 민감도 해석은 상용유한요소 프로그램인 MIDAS Civil과 ABAQUS를 사용하여 수행하였다. solid 요소 기반인 모델을 기준으로 하여 구조모델간 평균 및 최대 상대오차를 분석하였다. 해석결과 beam 요소 기반인 모델은 상대오차가 크게 발생하였고 shell 요소 기반인 모델은 상대오차가 아주 미소하였다. 따라서 무조인트 교량의 최적 수치해석 모델은 상대오차에 의한 변위 형상의 유사성과 정밀도를 유지하면서 실용적인 모델인 shell 요소 기반 모델이 가장 적합한 것으로 판단하였다.

Keywords

Acknowledgement

본 연구는 한국도로공사 도로교통연구원의 연구비 지원에 의해 수행되었습니다. 이에 감사드립니다.

References

  1. Ahn, J.H., Yoon, J.H., Jang, J.W., Kim, S.H., Lee, S.W. (2009) Application and Behavior of Integral Abutment Bridge on Multispan PSC Girder Bridge, Korean Soc. Civil Eng., pp.138~141.
  2. Frosch, Robert J. (2006) Jointless and Smoother Bridges: Behavior and Design of Piles, Purdue University.
  3. Girton, D.D., Hawkinson, T.R., Greimann, L.F. (1989) Validation of Design Recommendation for Integral Abutment, Iowa State University.
  4. Jang, J.W. (2011) Performance Analysis and Parametric Study of Semi-Integral Abutment Bridge Considering Thermal Variation, Master's Thesis, Yonsei University.
  5. Jorgenson, James L. (1982) Behavior of abutment Piles in an Integral Abutment in Response Bridge Movements, Transportation Research Record, 903, pp.72~79.
  6. Kim, S.H., Ahn, J.H., Yoon, J.H., Jang, J.W. (2010) Structural Analysis of Steel Box Integrated Bridge using Plate and Solid, Proc. 2010 Academic Conf., Korean Society of Civil Engineers.
  7. Kim, W.S. (2011) Analysis and Prediction for Abutment Behavior of Prestressed Concrete Girder Integral Abutment Bridges, Korea Concr. Inst. Symp., 23(5), Korea Concrete Institute.
  8. Korea Expressway Corporation Research Institute (KECRI) (1999) Research on Commercialization of Jointless Bridges, Korea Expressway Corporation Research Institute.
  9. Korea Expressway Corporation Research Institute (KECRI) (2016) Improving Performance of Non-Joint Bridges and Research on Jointless of Existing Bridges, Korea Expressway Corporation Research Institute.
  10. Korea Expressway Corporation Research Institute (KECRI) (2018a) Design Guidelines for Integral Abutment Bridge (Jointless Bridges), Korea Expressway Corporation Research Institute.
  11. Korea Expressway Corporation Research Institute (KECRI) (2018b) A Study on the Application of Expansion of Small Bridges in Integral Abutment Bridge with Reinforced Concrete Link, Korea Expressway Corporation Research Institute.
  12. Korea Expressway Corporation Research Institute (KECRI) (2019) Guidelines for the Design of a Parapet Wall Integral Abutment Bridge, Korea Expressway Corporation Research Institute.
  13. MIDAS IT (2020) http://manual.midasuser.com/KR/Civil/890/index.htm.
  14. Ministry of Land, Infrastructure and Transport (MOLIT) (2016) Road Bridge Design Standards, Ministry of Land, Infrastructure and Transport.
  15. Mitchell, Caleb (2016) Finite Element Analyses and Proposed Strengthening of a Reinforced Concrete Box Girder Bridge Subjected to Differential Settlement, Kansas State University.
  16. Nikravan, Navid (2013) Structural Design Issues For Integral Abutment Bridges, Ryerson University.
  17. Simulia (2020) https://help.3ds.com/2018/english/dssimulia_established/simacaeitnrefmap/simaitn-c-contactpairform.htm?contextscope=all.