Embodied CO2 Reduction Effects of Composite Precast Concrete Frame for Heavily Loaded Long-Span Logistics Buildings

Abstract

For heavily loaded long-span (HLS) logistics buildings, embodied CO2 (ECO2) of a structural frame accounts for more than 80% of the CO2 emissions of the entire building. To realize a sustainable structure from the CO2 perspective, an innovative construction method that reduces ECO2 of a structural frame is required. Through studies conducted over several years, we have developed a SMART (Sustainable, Measurable, Attainable, Reliable, and Timely) frame that is a steel connected composite precast concrete (CPC) frame that significantly reduces not only construction time and cost but also ECO2. If a SMART frame is applied to HLS logistics buildings, ECO2 reduction effects are expected to be substantial. To prove this, this study aims to analyze ECO2 reduction effects of the CPC frame for HLS logistics buildings. An HLS logistics building constructed with the existing precast concrete (PC) frame was selected as a case project. Thereafter, the typical PC girder was redesigned using the SMART frame; then, analysis was conducted on the quantity take-off of resources, such as form, rebar, steel, and concrete, as well as on ECO2 and production cost. As a result of the analysis, in the case of a single typical girder of the SMART frame, 730 kg-ECO2, which accounts for 9.52% of the CO2 emissions, was reduced compared to that of the existing PC frame. If only the typical girders of the case project are applied, a relatively larger quantity of 465 ton-ECO2 will be reduced. The results of this study will contribute in securing structural stability, as well as achieving a sustainable structure that leads to an unprecedented reduction of ECO2.

Forward and reverse logistics for circular economy in construction: A systematic literature review

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A Bibliometric and Content Review of Carbon Emission Analysis for Building Construction

“…CECS quantified space is a general term for all spatial sites where carbon emissions are generated by the construction of buildings or components. The embodied carbon emissions have been scrutinized in recent years [93][94][95].…”

Mechanical Behavior of a Novel Precast Concrete Beam–Column Joint Using the Mortise–Tenon Connection

“…At present, countries around the world pay more and more attention to energy conservation and green economy, and the construction industry is gradually developing in the direction of energy conservation and emission reduction. As a new type of energy-saving and environmentally friendly building product, precast concrete frame structures have prominent advantages of standardization, factory, and environmental protection, which helps to achieve the purpose of carbon reduction extremely well to a great extent [4][5][6]. The prefabricated components of precast concrete structures are made in the closed space of the factory and only need to be transported to the site for assembly.…”