Retrofit strategies for Existing STructures against prOgRessive collapsE (RESTORE)

人为的极端事件（如恐怖袭击、撞击、爆炸和火灾）会对结构造成局部破坏，这种破坏可能从一个构件扩散到另一个构件，导致整个结构或大部分结构的倒塌，即渐进式倒塌。就人员伤亡、经济损失和社会影响而言，这些都是最严重的事件，一些案例已经证明了这一点，例如，2021年尚普兰塔（Champlain Towers）的逐步部分倒塌。RESTORE项目提出了一个创新框架，用于评估现有钢筋混凝土（RC）建筑在人为危害下的逐步倒塌风险，并设计增强坚固性和弹性的解决方案。该项目研究了创新的改造解决方案，包括全球和地方干预措施的结合，旨在权衡两种策略的利弊，从而实现有效的改造干预措施，应对多种危害。它们将：-确保结构冗余，减轻多重风险（稳健性）的渐进式崩溃风险-提供拆除重建策略的替代方案；允许现有结构的再利用和减少对环境的影响（可持续性和低二氧化碳排放）-在安装期间对建筑物的普通功能具有低侵入性（低业务中断）-在极端事件下最大限度地减少倒塌的可能性（保护人类生命）-经历最小的损坏，可以快速修复（战略建筑的高弹性）卓越的研究设施和课程主办机构（伦敦大学学院，世界排名前十的大学）的研究人员，导师的专业知识，以及学术合作伙伴和知名产业合作伙伴（ARUP）的参与，保证了项目的高科学价值，项目的完成和成果在实践中的利用。

Man-made extreme events (i.e., terrorist attacks, impacts, explosions, and fires) can cause local damage to structures which may spread from element to element leading to the collapse of the entire structure or a large part of it, i.e., progressive collapse. These are among the most severe events in terms of casualties, economic losses, and societal impact, as has been made evident by several cases, e.g., the progressive partial collapse of the Champlain Towers in 2021. The RESTORE project proposes an innovative framework to assess the progressive collapse risk of existing Steel and Reinforced Concrete (RC) buildings subjected to man-made hazards and design robustness- and resilience-enhancing solutions. The project investigates innovative retrofit solutions, including combinations of global and local interventions, aiming for a trade-off between benefits and drawbacks of both strategies, thus enabling effective retrofit interventions against multiple hazards. They will:- ensure structural redundancy, mitigating progressive collapse risk against multiple-hazards (robustness)- provide an alternative to the demolish-and-rebuild strategy, allowing for the re-use of existing structures and the reduction of environmental impact (sustainability and low CO2 emissions)- have low invasiveness on the ordinary functions of the building during the installation (low business interruption)- minimise the probability of collapse under extreme events (protection of human life)- experience minimal damage that can be rapidly repaired (high resilience for strategic buildings)The excellence of the research facilities and courses for young researchers of the host institution (UCL, ranked among the world's top 10 universities), the Supervisor's expertise, and the involvement in the project of academic partners and of a high-profile industrial collaborator (ARUP) guarantee a high scientific value, the completion of the project and the exploitation of the achieved results in practice.