Punching Shear Behaviour of FRP-Reinforced Concrete Slab-Column Connections

FRP 钢筋混凝土板柱连接的冲剪性能

• 批准号: 249621-2012
• 负责人: Elsalakawy, Ehab
• 金额: $ 2.04万
• 依托单位: University of Manitoba
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2013
• 资助国家: 加拿大
• 起止时间: 2013-01-01 至 2014-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=524726
• 关键词: Punching; Shear; Behaviour; FRP; Reinforced

The use of the non-corrodible fibre reinforced polymer (FRP) bars to reinforce concrete structures built in harsh environments, such as bridges and parking garages is beneficial to avoid the costly steel-corrosion problems. In North America, a large number of parking structures and industrial buildings is constructed using flat plate system in which concrete slabs are directly supported on columns. The most critical element in such structural system is the slab-column connection where punching shear stresses are the largest. Punching shear failures are usually brittle, sudden and catastrophic in nature and should be avoided. Since FRP bars have linear-elastic behaviour till failure with low stiffness and reduced compressive strength, there are concerns regarding the ductility performance, shear capacity and the integrity of such joints when FRP bars are used, especially under seismic loads. Very limited to no data is available on that topic.

使用耐腐蚀纤维增强聚合物(FRP)筋加固在恶劣环境中建造的混凝土结构，如桥梁和停车场，有利于避免昂贵的钢筋腐蚀问题。在北美，大量的停车结构和工业建筑采用混凝土楼板直接支承在柱上的平板体系。这种结构体系中最关键的构件是冲切应力最大的板柱节点。冲切破坏通常是脆性、突发性和灾难性的，应该避免。由于FRP筋在破坏前具有线弹性性能，刚度低，抗压强度降低，因此在使用FRP筋时，特别是在地震荷载作用下，这种节点的延性性能、抗剪能力和节点的完整性受到关注。非常有限，因为没有关于这个主题的数据。