Fire-Exposed Reinforced Concrete Frames: Structural Performance, Progressive Collapse Assessment and Retrofit Strategy

暴露在火灾中的钢筋混凝土框架：结构性能、渐进式倒塌评估和改造策略

• 批准号: RGPIN-2015-06058
• 负责人: Youssef, Maged
• 金额: $ 1.6万
• 依托单位: University of Western Ontario
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=636434
• 关键词: Fire; Exposed; Reinforced; Concrete; Frames

The collapse of the towers of the World Trade Center and the many documented fire-initiated structural failures raise grave concerns about public safety. The majority of Reinforced Concrete (RC) structures are designed using prescriptive fire design approaches that are based on structural tests of RC elements exposed to standard fires. However, they possess significant drawbacks including: undefined safety margin at the structure level, unknown resistance to progressive collapse and inapplicability to consider innovative cost-saving solutions demanded by the complex natural fire phenomena. They also fail to provide the needed guidance to evaluate and retrofit fire-damaged structures.

世贸中心（World Trade Center）双塔的倒塌，以及许多有记录的火灾引发的结构故障，引发了人们对公共安全的严重担忧。大多数钢筋混凝土（RC）结构都是使用基于暴露于标准火灾下的RC构件结构测试的规范防火设计方法进行设计的。然而，它们存在着显著的缺陷，包括：结构层面的安全裕度不确定，对渐进倒塌的抵抗能力未知，以及无法考虑复杂自然火灾现象所需的创新成本节约方案。他们也没有提供必要的指导来评估和改造火灾损坏的结构。