LIGHTSTEEL: New Generation of Lightweight Steel Elements for Sustainable Resilient Construction

LIGHTSTEEL：新一代轻质钢构件，用于可持续弹性建筑

• 批准号: EP/X021203/1
• 负责人: Iman Hajirasouliha
• 金额: $ 26万
• 依托单位: University of Sheffield
• 依托单位国家: 英国
• 项目类别: Fellowship
• 财政年份: 2022
• 资助国家: 英国
• 起止时间: 2022 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FX021203%2F1
• 关键词: LIGHTSTEEL; New; Generation; Lightweight; Steel

Modern society is challenged by economic and environmental issues such as climate change, requiring engineers to deModern society is challenged by economic and environmental issues such as climate change, requiring engineers to develop more efficient and sustainable construction solutions. The urbanisation and rapid population growth in earthquake-prone regions have also increased societal exposure to seismic related hazards and the urgent need for more resilient structural systems. Cold-formed steel (CFS) structures can offer a cost-effective and sustainable alternative to traditional construction systems, and are being increasingly adopted in modern construction due to their lightweight, rapid construction and full recyclability. However, typical CFS structures have low buckling resistance and ductility, which limits their practical application especially in seismic regions and tall buildings. This research project aims to develop a novel CFS structural built-up system with high structural performance for rapid construction of multi-storey buildings in seismic regions. The new system benefits from high-performance CFS built-up elements optimised under axial and flexural loading by taking into account their post-buckling behaviour. This will allow for adoption of this system in tall buildings, large open spaces and flexible architectural design. Such innovative structural solutions can reduce the required structural weight, and hence, the construction costs and embodied carbon by 30-50% compared to conventional steel constructions. An advanced design framework will be developed to obtain cost-effective structures with optimum structural performance under normal (gravity and wind) and extreme (strong earthquake) load conditions. This project bridges the knowledge gap by developing fundamental understanding, advanced optimisation tools and performance-based design guidelines so that the new high performance CFS structural system can be widely used in practice.

现代社会受到气候变化等经济和环境问题的挑战，要求工程师开发更高效和可持续的建筑解决方案。地震多发地区的城市化和人口快速增长也增加了社会对地震相关危害的暴露，迫切需要更具弹性的结构系统。冷弯型钢（CFS）结构可以为传统建筑系统提供具有成本效益和可持续性的替代方案，并且由于其轻质，快速施工和完全可回收性而越来越多地被现代建筑采用。然而，典型的碳纤维布结构的屈曲抗力和延性较低，这限制了其在地震区和高层建筑中的实际应用。本研究旨在开发一种新型的CFS结构组合体系，具有高的结构性能，用于地震区多层建筑的快速建造。新系统受益于高性能CFS组合元件，通过考虑其后屈曲行为，在轴向和弯曲载荷下进行了优化。这将允许在高层建筑、大型开放空间和灵活的建筑设计中采用该系统。与传统的钢结构相比，这种创新的结构解决方案可以减少所需的结构重量，从而减少30-50%的建筑成本和隐含碳。将制定一个先进的设计框架，以获得具有成本效益的结构，在正常（重力和风）和极端（强震）荷载条件下具有最佳结构性能。该项目通过开发基本的理解，先进的优化工具和基于性能的设计指南来弥合知识差距，以便新的高性能CFS结构系统可以在实践中广泛应用。

项目成果

Incremental stiffening approach for CFS built-up-beams with large imperfections: Tests and flexural-behaviour

具有大缺陷的 CFS 组合梁的增量加固方法：测试和弯曲行为

• DOI: 10.1016/j.istruc.2023.05.003
• 发表时间: 2023
• 期刊: Structures
• 影响因子: 4.1
• 作者: Dar M

Development of lightweight CFS composite built-up beams: Tests and flexural response

• DOI: 10.1016/j.jcsr.2023.108041
• 发表时间: 2023-10
• 期刊: Journal of Constructional Steel Research
• 影响因子: 4.1
• 作者: M. A. Dar;A. F. Ghowsi;A. Dar;Shahid Salam;M. Anbarasu;K. Vivek;I. Hajirasouliha

Web crippling instability response in CFS built-up open beams: Numerical study and design

CFS 组合开梁中的腹板破坏不稳定响应：数值研究和设计

• 发表时间: 2023
• 期刊: Proceedings of the Annual Stability Conference Structural Stability Research Council, SSRC 2023
• 作者: Dar M.A.