Journal of the Korea Institute of Building Construction (한국건축시공학회지)

The Korean Institute of Building Construction (한국건축시공학회)
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Advancing an Automated Algorithm for Estimating Rebar Quantities in Columns

  • Received : 2023.06.04
  • Accepted : 2023.07.24
  • Published : 2023.08.20
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Abstract

Manual estimation of rebar quantities by contractors often yields discrepancies between projected and actual amounts used in the construction phase, leading to cost inaccuracies and potential logistical challenges. To address these issues, there is a clear need for a method that allows precise estimation of rebar quantities during the design phase. Such a method would enhance contractor competitiveness during project bids, promote accurate cost calculations, and avert superfluous rebar purchases on-site. Given that columns are the primary structural components in reinforced concrete(RC) buildings and necessitate considerable amounts of rebar, this study focuses on creating an automated algorithm for estimating column rebar quantities. An analysis of the accurate quantities obtained via the study and those derived from manual estimation reveals a discrepancy of 0.346 tons or 2.056%. This comparison affirms the proposed algorithm's efficacy in eliminating errors from overestimation or underestimation of rebar quantities. The practical implications of this study are significant for construction companies as it fosters efficient and precise estimation of rebar quantities, ensuring compliance with related specifications and governing regulations.

Keywords

Acknowledgement

This work was supported by the National Research Foundation of Korea(NRF) grants funded by the Korean government(MOE)(No. 2022R1A2C2005276).

References

  1. Holm L, Schaufelberger JE, Griffin D, Cole T. Construction cost estimating: Process and practices. 1st ed. Londun (UK): Pearson; 2005. 354 p. 
  2. Khosakitchalert C, Yabuki N, Fukuda T. Improving the accuracy of BIM-based quantity takeoff for compound elements. Automation in Construction. 2019 Oct;106:102891. https://doi.org/10.1016/j.autcon.2019.102891 
  3. Aram S, Eastman C, Sacks R. A knowledge-based framework for quantity takeoff and cost Estimation in the AEC industry using BIM. The 31st International Symposium on Automation and Robotics in Construction and Mining; 2014 Jul 9-11; Sydney, Australia. Australia: The International Association for Automation and Robotics in Construction; 2014. P. 434-42. https://doi.org/10.22260/ISARC2014/0058 
  4. Monteiro A, Martins JP. A survey on modeling guidelines for quantity takeoff-oriented BIM-based design. Automation in Construction. 2013 Nov;34:238-53. https://doi.org/10.1016/j.autcon.2013.05.005 
  5. Sacks R, Eastman C, Lee G, Teicholz P. BIM Handbook: A guide to building information modeling for owners, designers, engineers, contractors, and facility managers. 3rd ed. Hoboken (NJ): Wiley; 2018. 688 p. 
  6. Kim D, Lim C, Liu Y, Kim S. Automatic estimation system of building frames with integrated structural design information (AutoES). Iranian Journal of Science and Technology, Transactions of Civil Engineering. 2020 Sep;44:1145-57. https://doi.org/10.1007/s40996-019-00308-5 
  7. Halpin DW, Senior BA. Construction management. 4th ed. Hoboken (NJ): Wiley; 2011. 445 p. 
  8. Northen A, Benge D. NRM 2: Detailed Measurement for Building Works. 2nd ed. London (UK): Royal Institution of Chartered Surveyors (RICS); 2021. 348 p. 
  9. Civil Engineers I. CESMM4: civil engineering standard method of measurement. 4th ed. London (UK): Thomas Telford Ice; 2012. 111 p. 
  10. Samarakkody DI, Thambiratnam DP, Chan THT, Moragaspitiya. Differential axial shortening and its effects in high rise buildings with composite concrete filled tube columns. Construction and Building Materials. 2017 Jul;143:659-72. https://doi.org/10.1016/j.conbuildmat.2016.11.091 
  11. Murcia-Delso J, Stavridis A, Shing B. Modeling The Bond-Slip Behavior of Confined Large Diameter Reinforcing Bars. III ECCOMAS Thematic Conference on Computational Methods in Structural Dynamics and Earthquake Engineering; 2011 May 25-28; Corfu, Greece. Athens (Greece): National Technical University of Athens; 2011. p. 1-14. 
  12. American Concrete Institute 318-14. Building code requirements for structural concrete. Farmington Hills (MI): American Concrete Institute; 2014. 519 p. 
  13. British Standard Institute. Structural use of concrete - part 1: code of practice for design and construction. Londun (UK): British Standard Institute; 1997. 150 p. 
  14. BS 8666:2020. Scheduling, dimensioning, cutting and bending of steel reinforcement for concrete - Specification Londun (UK): British Standard Institute; 2020. 32 p.