Knitting bespoke reinforcement for new concrete structures

为新混凝土结构编织定制钢筋

• 批准号: EP/M01696X/1
• 负责人: John Orr
• 金额: $ 30.75万
• 依托单位: University of Bath
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2015
• 资助国家: 英国
• 起止时间: 2015 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FM01696X%2F1
• 关键词: Knitting; bespoke; reinforcement; new; concrete

Emissions data suggests that 30-50% of all carbon emissions arise from activities in the built environment. The global population is expected to reach 9bn by 2050, with 67% living in urban areas. Meeting strict emissions reductions targets (in the UK - an 80% reduction by 2050) and facilitating global low-carbon design is therefore a major challenge for structural engineering.Concrete is the world's most widely used man-made material. The manufacture of cement accounts for a large proportion of global raw material expenditure and at least 5% of global CO2 emissions. Recent research has made it possible to cast geometrically complex concrete structures, capitalising on a key advantage of this fluid material. These developments allow new architectural expression, and the new geometries allow us to save considerable amounts of material through design optimisation.This new potential is being held back by current methods for reinforcing concrete. Although the steel rods that we use can be bent into standardised shapes, any further complexity adds considerable cost to the construction process.With the goal of achieving low carbon concrete design, two major challenges exist: 1) to reinforce structures with complex geometries and 2) to provide durable and resilient structures. Meeting both challenges would allow us to capitalise on the fluidity of concrete to meet long-term emissions reductions targets. This will require a completely new approach to design and construction of concrete structures.This proposal will completely replace internal steel reinforcement with a knitted composite reinforcement cage made from carbon fibre tows. By fabricating this reinforcement in exactly the right geometry, we will provide exactly the right strength exactly where it is needed. This will be transformative for concrete construction, and will greatly simplify the reinforcing of more efficient concrete structures to help the UK meet its ambitious targets for emissions reductions.

排放数据表明，所有碳排放的30-50%来自建筑环境中的活动。到2050年，全球人口预计将达到90亿，其中67%居住在城市地区。因此，满足严格的减排目标（在英国，到2050年减排80%）和促进全球低碳设计是结构工程的主要挑战。混凝土是世界上使用最广泛的人造材料。水泥的生产占全球原材料支出的很大一部分，至少占全球二氧化碳排放量的5%。最近的研究使得浇筑几何形状复杂的混凝土结构成为可能，充分利用了这种流体材料的一个关键优势。这些发展允许新的建筑表达，新的几何形状允许我们通过设计优化节省大量的材料。这种新的潜力被目前加固混凝土的方法所阻碍。虽然我们使用的钢棒可以弯曲成标准化的形状，但任何进一步的复杂性都会增加施工过程的相当大的成本。为了实现低碳混凝土设计的目标，存在两个主要挑战：1)加强具有复杂几何形状的结构，2)提供耐用和有弹性的结构。应对这两个挑战将使我们能够利用混凝土的流动性来实现长期减排目标。这将需要一种全新的方法来设计和建造混凝土结构。该方案将完全取代内部钢筋，用碳纤维纤维制成的编织复合钢筋笼。通过在正确的几何形状中制造这种钢筋，我们将在需要的地方提供正确的强度。这将是混凝土建筑的变革，并将大大简化更高效的混凝土结构的加固，帮助英国实现其雄心勃勃的减排目标。

项目成果

Innovative construction using flexible moulds

使用灵活模具的创新结构

• 发表时间: 2016
• 作者: Orr, J J

Bend-strength of wound carbon fibre reinforced polymer shear reinforcement

缠绕碳纤维增强聚合物剪切增强材料的弯曲强度

• 发表时间: 2017
• 期刊: Advanced Composites in Construction, ACIC 2017 - Proceedings of the 8th Biennial Conference on Advanced Composites in Construction
• 作者: Ivanova K.

Fabric formed concrete: physical modelling for assessment of digital form finding methods

织物成型混凝土：用于评估数字找形方法的物理建模

• DOI: 10.17863/cam.20923
• 发表时间: 2016
• 期刊: Concrete international
• 作者: W. Hawkins;J. Orr;P. Shepherd;T. Ibell
• 通讯作者: T. Ibell

New frontiers for the use of FRP reinforcement in geometrically complex concrete structures

在几何形状复杂的混凝土结构中使用 FRP 加固的新领域

• 发表时间: 2016
• 作者: Spadea S

Bend-strength of novel filament wound shear reinforcement

• DOI: 10.1016/j.compstruct.2017.05.032
• 发表时间: 2017-09
• 期刊: Composite Structures
• 影响因子: 6.3
• 作者: S. Spadea;J. Orr;K. Ivanova