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首页> 外文期刊>Building and Environment >Life cycle energy and environmental benefits of novel design-for-deconstruction structural systems in steel buildings
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Life cycle energy and environmental benefits of novel design-for-deconstruction structural systems in steel buildings

机译：钢结构建筑中新颖的解构设计结构系统的生命周期能量和环境效益

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Design for Deconstruction (DID) is a design approach that enables reuse of durable building components, including structural materials, across multiple building projects. An important DfD strategy is the use of prefabricated modular building assemblies and reversible connections, in contrast to cast-in-place composite systems that must be demolished at building end-of-life. In this paper we evaluate a novel DID flooring system consisting of pre-cast concrete planks and clamped connections. Life cycle energy and environmental benefits of using this DM system are evaluated using life cycle assessment (LCA) across four impact categories of interest to the building and construction sector including fossil fuel use, greenhouse gas emissions, respiratory effects, and photochemical smog formation. Eight different DM building designs are tested for 0-3 reuses compared with a traditional structural design, with energy and environmental benefits accruing from substitution of avoided structural materials. Designs reflect expected loads and current code requirements, while the additional time required for deconstruction of DM buildings is accounted for in the construction schedules. Monte Carlo simulation is used to generate 95% confidence intervals for the results. In general, DID designs result in higher initial (original building) energy use and environmental impacts, but have statistically lower impacts than traditional designs if flooring planks are used at least once. Reusing planks three times as designed decreases impacts by a mean value of of 60-70%, depending on the building configuration and impact category. Energy use and environmental impacts from eventual recycling and/or disposal of the reusable components are significant, and emphasize the relative benefits of reuse over recycling.
机译：解构设计（DID）是一种设计方法，可在多个建筑项目中重复使用包括结构材料在内的耐用建筑组件。 DfD的一项重要策略是使用预制的模块化建筑组件和可逆连接，这与必须在建筑物使用寿命结束时拆除的现浇复合系统形成鲜明对比。在本文中，我们评估了一种由预制混凝土板和夹紧式连接组成的新型DID地板系统。使用生命周期评估（LCA）对建筑和建筑行业感兴趣的四个影响类别（包括化石燃料的使用，温室气体排放，呼吸作用和光化学烟雾的形成）进行生命周期评估（LCA），评估使用该DM系统的生命周期能量和环境效益。与传统的结构设计相比，对八种不同的DM建筑设计进行了0至3的再利用测试，通过替代避免使用的结构材料，可带来能源和环境效益。设计反映了预期的负载和当前的规范要求，而在建设时间表中考虑了DM建筑物解构所需的额外时间。蒙特卡洛模拟用于生成结果的95％置信区间。通常，DID设计会产生较高的初始（原始建筑）能耗和环境影响，但如果至少使用一次地板，则与传统设计相比，其统计影响要小。按设计方案重复使用木板三次，可将影响平均降低60-70％，具体取决于建筑物的配置和影响类别。最终回收和/或处置可重复使用的组件对能源使用和环境造成的影响是巨大的，并强调了再利用相对于回收的相对利益。

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