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2024 Vol.14, Issue 3 Preview Page

Research Article

Automation of Rebar Quantity Estimation in the Detailed Design Stage Using BIM Model Properties- Focused on the Calculation of Column Reinforcement Quantity -

BIM모델 속성정보를 활용한 상세설계단계에서의 철근 수량산출 자동화 방안- 기둥 철근 수량산출 중심으로 -

Ha-Neul Lee1
,
Seok-Heon Yun2*
이 하늘1
,
윤 석헌2*
1학생회원, 경상국립대학교 건축공학과 석사과정
2정회원, 경상국립대학교 건축공학과 교수
*Corresponding Author
30 September 2024. pp. 13-21
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Abstract

This study aims to simplify the rebar quantity estimation process during the detailed design stage of buildings by addressing identified issues in the existing rebar quantity estimation process and establishing a BIM-based simplification method. To validate the applicability of the proposed method, it was applied to a case study of 'K' High School, with the results compared to rebar quantities from shop drawings to assess usability in real projects. It showed an error rate of 1.4% for SHD22S and 2.63% for HD10 among the types of rebar used in the case model. SHD22S, used as the main rebar in the columns, exhibited this error due to differences in the calculation method for splice and anchorage lengths. HD10, used as stirrup rebar in the columns, showed errors due to the omission of hook length considerations in the simplified estimation formula. Although these discrepancies resulted in cumulative errors of 10 to 20 meters, the error rates of 1.4% and 2.63% respectively fall within the generally accepted rebar overage rate of 5%, suggesting that this method is sufficiently accurate for quantity estimation during the detailed design stage. This study presents a method for efficiently estimating rebar quantities based on BIM during the detailed design stage. While traditional 2D quantity estimation and BIM-based methods often suffer from inefficiencies due to repetitive tasks and high modeling complexity, the proposed method assumes BIM models at LOD200, which are less complex and automate most of the structural information required for rebar quantity estimation, thereby reducing repetitive tasks. However, to further minimize errors, especially those related to hook and anchorage length calculations, additional research is needed to refine the estimation process and expand its applicability to the entire building's rebar quantity estimation.

Keywords
Rebar
BIM
Quantity Estimation
Detailed Design
키워드
철근
건물정보모델
물량산출
상세설계
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Information
  • Publisher :Journal of KIBIM
  • Publisher(Ko) :한국BIM학회
  • Journal Title :Journal of KIBIM
  • Journal Title(Ko) :한국BIM학회논문집
  • Volume : 14
  • No :3
  • Pages :13-21
  • Received Date : 2024-08-21; 2024-08-28
  • Accepted Date : 2024-08-29
  • DOI :https://doi.org/10.13161/kibim.2024.14.3.013
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