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工程力学  2015 

FRP-PVC管混凝土受弯构件力学性能研究

DOI: 10.6052/j.issn.1000-4750.2014.05.S001

Keywords: FRP-PVC管,纯弯,本构关系,有限元,公式

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Abstract:

为了揭示FRP-PVC管混凝土受弯构件的力学性能,该文进行了6根试件的弯曲试验,并编写了有限元分析程序,在验证有限元分析结果正确的基础上,研究了FRP包裹层数、FRP包裹类型和FRP包裹方式对FRP-PVC管混凝土受弯性能如破坏模式、极限弯矩承载力及应力-应变关系的影响。通过分析其工作机理,得出简化的极限承载力公式。研究表明受弯构件的受力过程分为弹性阶段、弹塑性阶段和破坏阶段3个阶段;与同条件下无FRP包裹的PVC管混凝土相比,承载力随FRP体积率增大而增大、随混凝土强度提高而增大;相同FRP体积含量下CFRP与BFRP包裹方式相比,在承载力和延性上有很大的提高。

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