Embodied carbon of BIM bridge models according to the application of off-site prefabrication: Precast concrete applied to superstructure and substructure

IF 6.2 2区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY Developments in the Built Environment Pub Date : 2024-10-01 DOI:10.1016/j.dibe.2024.100550

Hyunsik Kim , Seungjun Roh , Jeonghwan Kim

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Abstract

Embodied carbon (EC) changes of bridges using PC and RC, were analyzed using BIM and One-Click LCA. Identically shaped, concrete bridges (RC, PC, superstructure-only PC, and substructure-only PC) were modeled; the bills of quantity were extracted and input into the LCA software for EC comparison. As a result, it was found that applying PC instead of RC is not necessarily a guaranteed method to reduce the EC of bridges. Sensitivity analysis on the EC according to concrete waste and material transportation distances of all models were conducted. References from a carbon perspective were presented for applying PC separately to superstructure and substructure. As a result, solutions for the application of PC were derived considering the changes in concrete waste and transportation distance of concrete inputs. Conclusively, it was analyzed that substructure-only PC is effective in reducing EC overall, regardless of the amount of concrete waste and transportation distance of inputs.

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根据场外预制的应用情况确定 BIM 桥梁模型的含碳量：应用于上部结构和下部结构的预制混凝土

使用 BIM 和一键式生命周期评估分析了使用 PC 和 RC 的桥梁的内蕴碳（EC）变化。对形状相同的混凝土桥梁（RC、PC、纯上部结构 PC 和纯下部结构 PC）进行建模；提取工程量清单并输入生命周期评估软件，以进行 EC 比较。结果发现，用 PC 代替 RC 不一定能保证降低桥梁的 EC。根据所有模型的混凝土废料和材料运输距离，对 EC 进行了敏感性分析。从碳的角度提出了将 PC 分别应用于上部结构和下部结构的参考方案。因此，考虑到混凝土废料和混凝土投入品运输距离的变化，得出了应用 PC 的解决方案。最后，分析结果表明，无论混凝土废料的数量和投入物的运输距离如何，仅下部结构 PC 可有效减少整体的碳排放量。

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来源期刊

Developments in the Built Environment Multiple-

CiteScore

7.40

自引率

1.20%

发文量

审稿时长

22 days

期刊介绍： Developments in the Built Environment (DIBE) is a recently established peer-reviewed gold open access journal, ensuring that all accepted articles are permanently and freely accessible. Focused on civil engineering and the built environment, DIBE publishes original papers and short communications. Encompassing topics such as construction materials and building sustainability, the journal adopts a holistic approach with the aim of benefiting the community.