Journal of Korean Society of Steel Construction (한국강구조학회 논문집)

Korean Society of Steel Construction (한국강구조학회)
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Evaluation of Flexural Behavior of a Modular Pier with Circular CFT

충전원형강관을 이용한 모듈러 교각의 휨 거동 평가

  • Ma, Hyang Wook (Daewoo Institute of Construction Technology) ;
  • Oh, Hyun Chul (Daewoo Institute of Construction Technology) ;
  • Kim, Dong Wook (Department of Civil Engineering, Chung-Ang University) ;
  • Kong, Davon (Department of Civil Engineering, Chung-Ang University) ;
  • Shim, Chang Su (Department of Civil and Environmental Engineering, Chung-Ang University)
  • 마향욱 (대우건설 기술연구원, 토목연구팀) ;
  • 오현철 (대우건설 기술연구원, 토목연구팀) ;
  • 김동욱 (중앙대학교, 토목공학과) ;
  • ;
  • 심창수 (중앙대학교, 사회기반시스템공학부)
  • Received : 2012.05.16
  • Accepted : 2012.12.13
  • Published : 2012.12.27
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Abstract

A new modular pier system using concrete filled circular steel tubes was suggested to realize modular bridge substructures for accelerated bridge construction. Structural details and connection details were proposed by connection multiple concrete filled tubes (CFT) for standardized products of fabrication, delivery and erection. Static tests were performed for the modular pier with suggested details under lateral load conditions for weak and strong axes. Due to the eccentricity by the bracing system, the modular pier showed 5.23 times higher flexural stiffness and 6 times greater flexural strength from the test. It is proper for the rational design to evaluate stress and deformation by frame modeling of the modular CFT pier. Structural capacity of the pier can be obtained by adjusting the spacing of the CFT columns. Design recommendations were derived from the test.

모듈화된 급속시공 교량 구조물의 하부구조 형식으로 충전 원형강관을 이용한 교각 구조물을 제안하였다. 다수의 충전강관을 연결하여 표준화된 제품으로 생산하여 운반 조립할 수 있는 구조 상세와 연결 상세를 제안하였다. 제안된 구조상세와 연결상세를 반영한 모듈러 교각의 정적실험을 강축과 약축에 대해서 횡변위 조건으로 수행하였다. 단일 기둥으로 설계한 것에 비하여 모듈러 CFT 교각 시스템이 브레이싱으로 연결된 편심효과로 인해 5.23배 높은 휨강성을 나타내었고 휨강도도 6배 이상 증가하였다. 합리적인 설계를 위해서는 모듈러 CFT 교각을 프레임으로 모델링하여 응력 및 처짐 검토를 수행하는 것이 타당한 것으로 나타났다. 교각을 구성하는 기둥간의 간격 조정을 통해서 필요한 내하력을 확보할 수 있을 것으로 판단되고 설계를 위한 고려사항을 제안하였다.

Keywords

References

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