Widjaja, D.D.; Kim, S. Reducing Rebar Cutting Waste and Rebar Usage of Beams: A Two-Stage Optimization Algorithm. Buildings2023, 13, 2279.
Widjaja, D.D.; Kim, S. Reducing Rebar Cutting Waste and Rebar Usage of Beams: A Two-Stage Optimization Algorithm. Buildings 2023, 13, 2279.
Widjaja, D.D.; Kim, S. Reducing Rebar Cutting Waste and Rebar Usage of Beams: A Two-Stage Optimization Algorithm. Buildings2023, 13, 2279.
Widjaja, D.D.; Kim, S. Reducing Rebar Cutting Waste and Rebar Usage of Beams: A Two-Stage Optimization Algorithm. Buildings 2023, 13, 2279.
Abstract
The extensive utilization of rebar during the construction of the project generates immense rebar waste, leading to increased construction costs and significant greenhouse gas emissions. Various approaches have been explored focusing on the minimization of rebar-cutting waste, such as optimizing cutting patterns, lap splice position, and special-length rebar utilization. Nonetheless, reducing rebar usage by minimizing the number of splices remains uninvestigated. In response to these issues, a two-stage optimization algorithm was developed, prioritizing special-length rebar to achieve near-zero rebar-cutting waste of less than 1% and concurrently reduce rebar usage, thereby promoting sustainable construction practices. The two-stage algorithm presented in this study involves the optimization of the lap splice position for the continuous rebar with a reduction of splices number. Furthermore, it integrates a special-length minimization algorithm for the additional rebars. Applying the algorithm to beam structures in a small-sized factory building project led to a notable reduction of 29.624 tons of rebar, equivalent to 12.31% of the total purchased quantity. Greenhouse gas emissions were reduced by 102.68 tons, and associated costs decreased by USD 30,256. A rebar-cutting waste of 0.99% which is near zero was achieved. These findings highlight the significant potential of the proposed algorithm in reducing rebar waste and facilitating sustainable construction practices. In addition, the application of the proposed algorithm in reinforced concrete construction projects will amplify the associated advantages accordingly.
Engineering, Architecture, Building and Construction
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
