CO2 Optimization of Concrete-Filled Steel Tube Columns in Buildings

Byung Kwan Oh, Jun Su Park, Hyo Seon Park

Abstract


Much attention has been given to environmental issues around the world in recent years, and continuous efforts have been made to reduce greenhouse gases (GHGs). Carbon dioxide (CO2), which is the largest portion of GHGs, is produced from various industrial sectors including building relevant sector. Thus, the necessity to manage and reduce CO2 emissions in buildings has been raised. In addition to the building construction and operation phases, the building design phase has also been investigated to reduce CO2 emissions through sustainable structural design. Although a concrete-filled steel tube (CFT) column, which has its excellent structural performance, economic feasibility, and good space utilization, is widely used for highrise buildings, researches on sustainable structural design have focused on the reinforced concrete (RC) structures. With regard to CFT columns, which have a high potential to reduce CO2 emissions because of combining two heterogeneous materials, this study proposes an optimum sustainable structural design model with the minimum CO2 emissions using genetic algorithm (GA). The results of the optimum designs for CFT columns obtained from the proposed model were examined in terms of the environmental performance, economic feasibility and space utilization.


Keywords


sustainable structural design; embodied carbon dioxide; genetic algorithm; CFT column

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