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Building construction has a significant impact on embodied energy and greenhouse gas emission. These factors are associated with the production, transportation, building construction, demolition, disposal, and recycling of materials. The reduction of embodied energy and greenhouse gas emission is related to reduction in carbon imprint, which is often referred to as decarbonization. By adopting an appropriate structural design strategy for reinforced concrete buildings, it is possible to reduce the seemingly contrasting factors such cost of materials and construction, but also the embodied energy and carbon footprint. Because of the excellent reuse and recycling potential and relatively very high mechanical strength of steel, a structural component with a higher steel apportionment than that required for a cost-optimized solution commonly results in lower embodied energy and CO2 emission conducive to sustainability and decarbonization. In this study, a detailed parametric study has been conducted for reinforced concrete buildings with different design alternatives for building structures to achieve minimal cost, embodied energy, and CO2 emission. A set of 5-, 10-, and 15-storey high buildings located in Montreal, Canada, have been considered. Flat plates and flat slabs with drop panels supported by columns are quite common for multi-story buildings in North America. Therefore, these forms of the building structure have been considered. Among many different parameters, column steel ratio and slab thickness play an important role in cost, embodied energy, and carbon footprint. The foundation also accounts for a sizable portion of total structural cost, material, and embodied energy. Two types of raft foundation have been considered here for multi-story buildings: flat-plate rafts and beam-slab rafts, as they are quite common. Compared with flat-plate building foundations, flat slabs buildings foundations have been found to be favorable for cost, embodied energy, and carbon emission. Also, beam-slab rafts are found to perform better on these counts.

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Decarbonization Strategies for the Structural Design of Reinforced Concrete Buildings

  • 会议论文

  • 发表日期：

    2025年

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  • Ahmed Noman,
  • Ashutosh Bagchi,
  • Andreas Athienitis

摘要

Building construction has a significant impact on embodied energy and greenhouse gas emission. These factors are associated with the production, transportation, building construction, demolition, disposal, and recycling of materials. The reduction of embodied energy and greenhouse gas emission is related to reduction in carbon imprint, which is often referred to as decarbonization. By adopting an appropriate structural design strategy for reinforced concrete buildings, it is possible to reduce the seemingly contrasting factors such cost of materials and construction, but also the embodied energy and carbon footprint. Because of the excellent reuse and recycling potential and relatively very high mechanical strength of steel, a structural component with a higher steel apportionment than that required for a cost-optimized solution commonly results in lower embodied energy and CO2 emission conducive to sustainability and decarbonization. In this study, a detailed parametric study has been conducted for reinforced concrete buildings with different design alternatives for building structures to achieve minimal cost, embodied energy, and CO2 emission. A set of 5-, 10-, and 15-storey high buildings located in Montreal, Canada, have been considered. Flat plates and flat slabs with drop panels supported by columns are quite common for multi-story buildings in North America. Therefore, these forms of the building structure have been considered. Among many different parameters, column steel ratio and slab thickness play an important role in cost, embodied energy, and carbon footprint. The foundation also accounts for a sizable portion of total structural cost, material, and embodied energy. Two types of raft foundation have been considered here for multi-story buildings: flat-plate rafts and beam-slab rafts, as they are quite common. Compared with flat-plate building foundations, flat slabs buildings foundations have been found to be favorable for cost, embodied energy, and carbon emission. Also, beam-slab rafts are found to perform better on these counts.