HYBRID LIGHTWEIGHT STRUCTURAL SYSTEMS FOR LOW-COST HOUSING (HYLIGHTS)

用于低成本住房的混合轻质结构系统 (HYLIGHTS)

• 批准号: EP/W026988/1
• 负责人: Leroy Gardner
• 金额: $ 56.35万
• 依托单位: Imperial College London
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2023
• 资助国家: 英国
• 起止时间: 2023 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FW026988%2F1
• 关键词: HYBRID; LIGHTWEIGHT; STRUCTURAL; SYSTEMS; LOW

The legally binding UK government target to reach net zero carbon emissions by 2050 cannot be achieved without minimizing the carbon footprint of the construction sector. Over one-quarter of the world`s annual steel production is used in the construction of buildings but a study based on steel-framed designs for schools, offices and residential buildings, sourced from leading UK design consultancies, reveals the average material utilisation ratio for typical steel buildings is below 50% of their capacity. This suggests steel content in buildings could be significantly reduced by designing for minimum material, which would annually avert 214 million tonnes of carbon dioxide emissions worldwide. To reduce steel consumption in construction, the development of novel, materially efficient and sustainable lightweight structures is essential. There's a global need for housing as populations grow which creates tension with our need to cause less emissions by building less or more efficiently.Light steel frame (LSF) structures made of cold-formed steel (CFS) stud-walls and joisted floors are gaining growing popularity in modern construction practice worldwide, both in new developments and as a cost-effective and low-carbon solution for vertical extensions to existing buildings. The ease of offsite manufacturing utilising LSF structures offers many benefits compared to traditional methods, including: (a) improved quality and productivity, reduced material use, less wastage and savings of 30-50% in total construction time and associated costs; (b) flexibility for more tailored design solutions complying with the Design for Manufacture and Assembly approach; and (c) scalability for the technologies around automated construction. LSF systems can, therefore, directly contribute towards meeting the UK Government's ambitious house building commitments and reducing the initial cost of construction and whole life cost of assets, and CO2 emissions by 33% and 50%, respectively. However, the current use of LSF structural systems is limited due to critical drawbacks such as low local buckling resistance of thin-walled CFS elements, low lateral stiffness and robustness of typical LSF systems and limitations of current design and optimisation approaches to exploit their full capacity. These challenges should be addressed before LSF systems can be widely used both in the UK and overseas.

在2050年，在不实现建筑部门的碳足迹的情况下，无法实现具有法律约束力的英国政府目标，即在2050年达到零碳排放。从领先的英国设计咨询公司中提出的基于钢铁，办公室和住宅建筑的钢结构设计的研究中，使用了全球年度钢生产的四分之一，但揭示了典型钢制建筑的平均物质利用率低于其容量的50％。这表明，通过设计最低材料，可以大大降低建筑物中的钢含量，该材料每年都会避免全球范围内的2.14亿吨二氧化碳排放。为了减少建筑中的钢铁消耗，必须开发新颖，实质性高效和可持续的轻质结构。随着种群的增长，全球需要住房的需求，这与我们需要减少或更有效地构建发射的需求较少。钢制框架（LSF）结构由冷形成钢（CFS）制成的结构（CFS）螺柱墙和托梁地板在全球的现代建筑实践中越来越受欢迎，无论是在全球现代建筑实践中，无论是在新的开发项目中还是在成本效果上都在构建成本效果，以使其变得越来越低调。与传统方法相比，利用LSF结构的易异地制造具有许多好处，包括：（a）提高质量和生产力，减少材料使用，减少浪费和总施工时间和相关成本的30-50％； （b）符合制造和组装方法设计的更量身定制的设计解决方案的灵活性； （c）围绕自动结构的技术可扩展性。因此，LSF系统可以直接有助于满足英国政府雄心勃勃的房屋建设承诺，并降低资产的最初成本和整个资产成本，而二氧化碳排放量分别降低了33％和50％。但是，由于关键的缺点，例如薄壁的CFS元素的局部屈曲耐药性，典型LSF系统的低局部屈曲耐药性以及当前设计和优化方法的限制以利用其全容量，因此目前使用LSF结构系统的使用受到限制。在英国和海外可以广泛使用LSF系统之前，应应对这些挑战。