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국가 표준도를 이용한 토목 구조물 BIM 파라메트릭 라이브러리 구축에 관한 연구

Development of Parametric BIM Libraries for Civil Structures using National 2D Standard Drawings

  • 김청운 (서울과학기술대학교 건설시스템공학과) ;
  • 구본상 (서울과학기술대학교 건설시스템공학과)
  • Kim, Cheong-Woon (Department of Civil Engineering, Seoul National University of Science and Technology) ;
  • Koo, Bonsang (Department of Civil Engineering, Seoul National University of Science and Technology)
  • 투고 : 2014.05.08
  • 심사 : 2014.05.23
  • 발행 : 2014.07.31

초록

토목 분야 Building Information Modeling(BIM) 활성화를 위해 시급한 과제 중에 하나가 토목 구조물에 대한 라이브러리(Library)의 구축이다. 라이브러리의 구축을 통해 BIM 모델링의 시간을 단축할 수 뿐 아니라, 정확한 물량산출과 표준화된 모델의 공유가 가능해진다. 그러나, 건축분야에 비해 국내 토목 구조물에 대한 표준화된 라이브러리는 매우 부족한 실정이다. 본 연구에서는 국토교통부에서 제공하는 2차원 표준도를 기반으로 옹벽 및 암거 구조물을 라이브러리로 구축하였다. 상용 BIM 소프웨어를 사용하여 각각 구조물에 형상과 철근을 모델링하는 방법을 적용하였으며, 특히 라이브러리를 재활용하고 범용적으로 쓸 수 있기 위한 치수 및 물량 파라미터들을 정의하는데 주력하였다. 구축된 라이브러리를 실제 사업에 투입했을 경우, 정확하고 신속한 물량산출이 가능하고 형상정보가 1개의 라이브러리로 통합 관리되어 기존 2D 도면에 비해 관리가 용이하다는 것을 파악 할 수 있다. 또한 콘크리트 형상을 파라미터의 조정으로 쉽게 바꿀 수 있다는 것을 알 수 있다. 그러나, 철근의 경우에는 형상 파라미터를 조정함에 따라 스트럽 및 겹이음 철근의 조정이 제대로 되지 않아 아직까지는 수동으로 물량을 조정해야 하는 한계점이 있다. 본 연구의 결과를 통해 토목구조물은 비정형적이고 개별 사업에 따라 단품적으로 생산되기에 라이브러리의 구축이 어렵다는 인식에서 벗어나 국내 토목 시설물 기준 및 시방서에 따른 꾸준한 라이브러리 추적을 통해 BIM 적용 확산을 앞당길 수 있을 것으로 판단된다.

Development of infrastructure component libraries is a critical requirement for the accelerated adoption of BIM in the civil engineering sector. Libraries reduce the time for BIM model creation, allows accurate quantity take offs, and shared use of standard models in a project. However, such libraries are currently in very short supply in the domestic infrastructure domain. This research introduces library components for retaining walls and box culverts generated from 2D standard drawings made publicly available by MOLIT. Commercial BIM software was used to create the concrete geometry and rebar, and dimensional/volumetric parameters were defined to maximize the reuse and generality of the libraries. Use of the these libraries in a project context demonstrates that they allow accurate and quick quantity take offs, and easier management of geometric information through the use of a single library as to numerous 2D drawings. It also demonstrates the easy modification of the geometries of the components if and when they need to changed. However, the application also showed that some of the rebar components (stirrups and length wise rebars) do not get properly updated when concrete geometries are changed, demonstrating the limits of current software applications. The research provides evidence of the many advantages of using BIM libraries in the civil engineering, thus providing the incentive for further development of standard libraries and promoting the use of BIM in infrastructure projects.

키워드

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