The problem of environmental pollution and waste concrete generation will be alleviated if concrete structures can be designed with both recycling and reuse strategies. In this regard, this study employed recycled coarse aggregate as the structural material in a novel beam-column joint with Design for Deconstruction (DfD) connections. Two series cyclic loading tests including pre-loading and re-loading on this frame joint was undertaken and the effect of recycled aggregate concrete (RAC) on structural behaviors was carefully evaluated. It is demonstrated that the DfD joint with RAC had favorable integrity and the influence of RAC was acceptable for practical application. Furthermore, the shear force model of the joint core area for RAC beam-column joint with DfD connections was put forward in this study, which showed good agreements with experimental results. Life cycle assessment (LCA) indicated that the carbon emission of the beam-column joint with DfD connections made of RAC increased at construction process but would reduce the total carbon emission from the perspective of lifetime.

如果可以采用回收和再利用策略设计混凝土结构，将减轻环境污染和废混凝土产生的问题。在这方面，这项研究采用了回收的粗骨料作为具有解构设计（DfD）连接的新型梁柱节点的结构材料。进行了两个系列的循环荷载试验，包括对该框架节点的预荷载和重荷载，并仔细评估了再生骨料混凝土（RAC）对结构性能的影响。结果表明，与RAC的DfD接头具有良好的完整性，并且RAC的影响对于实际应用是可以接受的。此外，本研究还提出了具有DfD连接的RAC梁柱节点的节点核心区域的剪力模型，与实验结果显示出良好的一致性。生命周期评估（LCA）表明，具有RAC制成的DfD连接的梁柱接头的碳排放量在施工过程中增加，但从使用寿命的角度来看，它将减少总碳排放量。