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Multi-objective green design model to mitigate environmental impact of construction of mega columns for super-tall buildings
- Choi, Jewoo, Lee, Min Gyu, Oh, Hyung Seok, Bae, Sang Geun, An, Jung Hwan, Yun, Da Yo, Park, Hyo Seon
- The Science of the total environment 2019 v.674 pp. 580-591
- buildings, carbon dioxide, construction materials, cost effectiveness, design for environment, environmental impact, greenhouse gas emissions, models
- The mega columns used in super-tall buildings are several meters in size; thus, a greater quantity of construction materials are required than for a general column. Considering the environmental impact, research on a green design model for super-tall buildings is necessary. This design model should minimize both CO₂ emissions and cost in the mega-column construction and design phases with consideration of the member or building size. In this regard, a multi-objective green design model (MOGDM) capable of minimizing construction cost and reducing CO₂ emissions is proposed in this study. The MOGDM is applied to the design of mega columns for a super-tall building and its performance is evaluated based on the average environmental impact reduction rate (AER) and the average increase-in-cost reduction rate (AICR); these indexes are developed to assess the CO₂ emission and construction cost reduction capability. Under the loading scenarios considered in this study, the average AER and AICR for the MOGDM output are 6.76% and 58.02%, respectively. Thus, the evaluation results confirm that the MOGDM proposed in this study can effectively reduce CO₂ emissions and cost in the design and construction phases of mega columns for super-tall buildings.