Structural and Fire Resistance of a Reusable Steel/Concrete Composite Floor System

可重复使用的钢/混凝土复合地板系统的结构和防火性能

• 批准号: EP/N01135X/1
• 负责人: Yong Wang
• 金额: $ 53.71万
• 依托单位: University of Manchester
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2016
• 资助国家: 英国
• 起止时间: 2016 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FN01135X%2F1
• 关键词: Structural; Fire; Resistance; Reusable; Steel

One sixth of the world's CO2 emissions from energy and industrial process are released from the production of steel and cement, most of which is used in construction. Although reducing embodied energy in structures is increasingly being considered by structural engineers, it is very difficult to achieve meaningful results with today's construction methods because the different existing mainstream structural systems, whether steel, concrete or composite construction, use similar amounts of virgin materials and have similar embodied energy values. We propose a radically different approach to reduce the environmental impact of construction: by making structural components reusable at the end of life of the structure. This can potentially reduce the use of new materials of a structure by 50%. The concept of reusable structural components has been talked about, but no feasible solution is available. Without making structural components reusable, at the end of life of a building, although all the steel and concrete materials in the building structure remain serviceable, the building is demolished destructively, larger steel elements are recycled by energy-intensive melting, and the rest of the material is landfilled. This approach to construction is clearly wasteful - of energy, emissions and potentially cost. This project aims to develop a reusable composite floor system to be used in steel/concrete composite structures. It is important that this method of construction is developed as a mainstream structural engineering solution, rather than limited to very special conditions, so as to maximize the benefits of design and construction of reusable structural components at the end of life. Steel/concrete composite structures are chosen because this building type is the most commonly used in the UK.The proposed reusable floor system is a totally different form of construction, with new modes of structural behaviour that have not been investigated before. A complete rethink of composite floor structural and fire engineering design is necessary to ensure safety of the proposed floor system. Extensive new physical tests at ambient and elevated temperatures and in fire for the different components of the proposed floor system have been planned to identify the different modes of behaviour and failure of the system. Supplemented by extensive numerical simulations, this project will develop thorough understanding of the structural and fire performance of the new structural system to develop practical design methods. This project will be carried out in collaboration between the Universities of Bradford and Manchester, which have international leading experiences in composite structural behaviour and design at ambient temperature and in fire, and have dedicated and experienced research teams and experimental facilities.A steering group, consisting of high level representatives from key construction companies, will advise the research teams to ensure practical relevance of the research and to help promote the outcomes of the research. Various impact pathways have been planned, including a dedicated website for the project and APPs for designers, promotion of the research outcome to relevant Eurocode 4 (Eurocode for composite structures) committees (where the two applicants, Professors Lam and Wang, represent the UK for structural safety (Eurocode 4 Part 1.1, or EN 1994-1-1) and fire safety (Eurocode 4 Part 1.2, or EN 1994-1-2)), and a one-day colloquium at the end of the project.

世界上能源和工业过程排放的二氧化碳有六分之一来自钢铁和水泥的生产，其中大部分用于建筑。虽然结构工程师越来越多地考虑降低结构中的体现能量，但用今天的施工方法很难取得有意义的结果，因为现有的不同主流结构体系，无论是钢结构、混凝土结构还是组合结构，都使用相似数量的原始材料，具有相似的体现能值。我们提出了一种完全不同的方法来减少建筑对环境的影响：通过使结构组件在结构生命周期结束时可重复使用。这可能会将结构的新材料的使用减少50%。可重复使用的结构部件的概念已经被讨论过了，但没有可行的解决方案。在不使结构部件可重复使用的情况下，在建筑物的使用寿命结束时，尽管建筑结构中的所有钢和混凝土材料仍然可以使用，但建筑会被破坏性地拆除，较大的钢构件通过高耗能的熔炼进行回收，其余材料被填埋。这种建设方式显然是浪费能源、排放和潜在成本。本项目旨在开发一种用于钢/混凝土组合结构的可重复使用的组合楼盖体系。重要的是，将这种施工方法发展为主流结构工程解决方案，而不是局限于非常特殊的条件，以便在生命结束时最大限度地实现可重复使用结构部件的设计和施工的好处。选择钢/混凝土组合结构是因为这种建筑类型是英国最常用的建筑类型。拟议的可重复使用楼板系统是一种完全不同的建筑形式，具有以前从未研究过的新的结构行为模式。为了确保拟议楼板系统的安全，有必要对复合楼板结构和消防工程设计进行彻底的重新思考。已计划对拟议地板系统的不同部件在常温和高温下以及在火灾中进行广泛的新物理测试，以确定该系统的不同行为模式和故障。通过广泛的数值模拟，该项目将深入了解新结构体系的结构和防火性能，以开发实用的设计方法。这个项目将由布拉德福德大学和曼彻斯特大学合作进行，这两所大学在常温和火灾下的复合材料结构行为和设计方面拥有国际领先的经验，并拥有专门和经验丰富的研究团队和实验设施。一个由主要建筑公司的高层代表组成的指导小组将向研究团队提供建议，以确保研究的实用性，并帮助促进研究成果。已经规划了各种影响途径，包括为项目和设计师应用程序建立一个专门的网站，将研究成果推广到相关的欧洲规范4(欧洲组合结构规范)委员会(其中两名申请者，林教授和王教授代表英国结构安全(欧洲规范4 Part 1.1，或EN 1994-1-1)和消防安全(欧洲规范4 Part 1.2，或EN 1994-1-2))，以及在项目结束时举行为期一天的座谈会。

项目成果

Study on Fire Resistance of Prefabricated Demountable Composite Beams Using Bolted Shear Connectors

• DOI: 10.1007/s10694-023-01533-1
• 发表时间: 2024-01
• 期刊: Fire Technology
• 影响因子: 3.4
• 作者: Mengjie Wang;Guobiao Lou;Zhaohan Wen;Binhui Jiang;Yongchang Wang;Yaqiang Jiang

EXPERIMENTAL INVESTIGATION OF THE PERFORMANCE OF DEMOUNTABLE COMPOSITE BEAM SHEAR CONNECTORS AT AMBIENT & ELEVATED TEMPERATURES

可拆卸复合梁剪力连接器在环境下性能的实验研究

• DOI: 10.18057/icass2018.p.101
• 作者: Sencu R

Performance evaluation of demountable shear connectors with collar step at ambient and elevated temperatures

• DOI: 10.1016/j.engstruct.2019.05.059
• 发表时间: 2019-09
• 期刊: Engineering Structures
• 影响因子: 5.5
• 作者: R. Sencu;Yong C. Wang;J. Yang;D. Lam

New composite flooring system for the circular economy

面向循环经济的新型复合地板系统

• 发表时间: 2021
• 期刊: Steel and Composite Structures
• 影响因子: 4.6
• 作者: Lam, D.

An experimental investigation of the fire behaviour of demountable composite beams with profiled steel decking

• DOI: 10.1016/j.engstruct.2024.117944
• 发表时间: 2024-05
• 期刊: Engineering Structures
• 影响因子: 5.5
• 作者: Jiejie Long;Yongchang Wang;Guobiao Lou;Zhiyou Hu;Tao Yang;Qinghua Tan;Lu Ke