New generation of precast concrete double tees reinforced with carbon-fiber reinforced polymer grid

[摘要] Fiber-reinforced polymer (FRP) grid has several advantages over traditional welded-wire reinforcement, including high strength, corrosion resistance, light weight, and ease of installation. This research evaluates the behavior of double-tee flanges reinforced with FRP grid and subjected to uniform gravity pressure to examine their serviceability and failure mode. This study demonstrates that precast concrete double-tee beams reinforced with FRP grid are capable of resisting uniform pressures well in excess of the design loading. The mode of failure for these specimens was governed by the tensile strength of the concrete, with concrete cracking followed immediately by rupture of the FRP grid. No cracking was observed under service loading. It is recommended that the reduced nominal flexural strength with a ϕ factor of 0.75 exceed the moment due to factored load and that the reduced cracking moment capacity exceed 1.33 times the moment due to factored load.

[学科分类] 建筑学

[关键词] 2015;201507;August;July;PCI Journal;Article;Publications;Year;J2015;Journal;Pubs;Month;Name;Type