Carbon Negative Buildings for Sustainable Construction:Structural Performance of Hybrid Timber and Concrete Columns

最常见的传统建筑材料（混凝土和钢材）的生产需要大量的能源投入，并产生导致气候变化的温室气体。消费者、政策制定者和行业越来越认识到，迫切需要更多的“可持续”和绿色基础设施。木材的碳足迹比钢筋混凝土低17%到80%。因此，通过更广泛地使用木材，创造更可持续的基础设施具有巨大的潜力。传统上，木材在加拿大被广泛用于住宅建筑。它在较大的建筑和结构（高达6层）中的使用受到限制。这些结构需要更坚固的结构部件，而这些部件以前在木材中是不可用的。然而，通过将木材与混凝土结合，可以创造出更坚固的结构部件。使用混凝土的一个缺点是它的制造会产生大量的温室气体。这可以通过使用低碳胶凝材料而不是传统的混凝土来缓解。本研究将通过实验和分析研究木材和低碳胶凝材料混合的建筑构件的结构性能。这项研究的长期目标是为这些部件制定设计标准，以便将其纳入建筑规范，从而成为加拿大工程师设计真正可持续结构的工具。

The production of the most common conventional building materials, concrete and steel, requires large energy inputs and results in green-house gas production that contributes to climate change. There is a growing recognition by consumers, policy makers, and industry of the urgent need for more "sustainable" and green infrastructure. Timber has been shown to have a carbon footprint about 17% to 80% lower than reinforced concrete. Thus there is tremendous potential to create more sustainable infrastructure with wider use of timber. Traditionally, timber has been used widely in Canada for residential construction. Its use in larger buildings and structures (up to 6 storeys) has been limited. These structures require stronger structural components that have previously not been available in timber. However, by combining timber with concrete, a much stronger structural component can be created. A downside of using concrete is that its manufacture results in the production of large amounts of green-house gases. This can be mitigated by using low-carbon cementitious materials rather than conventional concrete. This research will investigate, experimentally and analytically, the structural performance of building components that are a hybrid of timber and low carbon cementitious materials. The long-term objective of this research is to develop design standards for these components such that they can be incorporated into building codes, and hence be a tool for Canadian engineers to design truly sustainable structures.