通过14根FRP管混凝土构件弯曲、轴压、偏压试验,得到了不同受力状况下的荷载-挠度、弯矩-曲率曲线以及应力-应变曲线.试验结果表明,经过环向、±45°和纵向混杂铺层设计的FRP管混凝土能有效地提高构件的承载力,构件具有很大的变形能力;FRP壳体不仅能参与承载,而且能有效地约束核心混凝土的变形,显著提高混凝土强度和延性;±45°铺层设计不仅提高构件的抗弯承载力,而且大大提高了斜截面承载力;弯矩-曲率曲线为二折线,第一刚度由混凝土截面控制,第二刚度由FRP管刚度控制.
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