Comparing the embodied carbon and energy of a mass timber structure system to typical steel and concrete alternatives for parking garages
Comparing the embodied carbon and energy of a mass timber structure system to typical steel and concrete alternatives for parking garages
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DOI：
10.1016/j.enbuild.2019.06.047
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发表时间：
2019-09-15
影响因子：
6.7
通讯作者：
Dusicka, P.
中科院分区：
文献类型：
--
作者：
Zeitz, A.;Griffin, C. T.;Dusicka, P.
由于通过高性能设计、施工和系统将运营能源使用降至最低，建筑材料和施工中的碳和能源将在建筑物的环境影响中发挥更大的作用。因此，结构系统应该是减少建筑物隐含碳和能量的主要目标。停车场为比较不同结构系统的碳和能量提供了一个理想的案例研究。由于停车场的运营能源消耗很少，材料或系统也很少，因此结构的碳和能量构成了其生命周期中的大部分环境影响。本研究使用了四个单向跨度停车库施工文件中的手动材料起飞;一个预制混凝土，一个后张混凝土，一个蜂窝钢和一个大量木材。结果表明，在最佳材料实践下，用于停车场的结构系统的隐含碳和能量差异不大。大量木材虽然在最坏的情况下更可行，但在使用水泥替代品和高回收含量的钢材时失去了优势。(C)2019 Elsevier B. V.版权所有。
As operational energy use is minimized through high-performance design, construction and systems, the embodied carbon and energy from building materials and construction will play larger roles in the environmental impact of buildings. Consequently, the structural system should be a primary target for reducing the embodied carbon and energy of a building. Parking garages offer an ideal case study for comparing the embodied carbon and energy of different structural systems. As parking garages have little operational energy use and have few materials or systems, the embodied carbon and energy of the structure comprises a majority of the environmental impacts during its life-cycle. This study uses manual material take-offs from construction documents of four parking garages with one-way spans; one pre-cast concrete, one post-tensioned concrete, one cellular steel and one mass timber. The resulting comparison shows that there is little difference in the embodied carbon and energy of structural systems used for parking garages under best material practices. Mass timber, while more viable in a worst-practices scenario, loses its advantages when cement replacement and high recycled content steel are utilized. (C) 2019 Elsevier B.V. All rights reserved.