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为了研究纤维增强复合材料(FRP)管壁厚度和试件尺寸对FRP-型钢-混凝土组合短柱力学性能的影响,对2根FRP-型钢-混凝土组合短柱进行轴心受压实验;利用有限元软件建立数值模型,对10根模拟试件进行分析,绘制试件在静力荷载作用下的荷载-应变曲线,分析FRP管壁厚度及试件尺寸对FRP-型钢-混凝土短柱轴心受压下力学性能的影响规律。结果表明:在试件尺寸相同的情况下,FRP管壁厚度越大,试件的承载能力越强,延性越好;随着试件尺寸的增大,试件极限应力增大的幅度减小,导致试件的延性劣化。
In order to study the influence of FRP wall thickness and specimen size on the mechanical properties of FRP-type steel-concrete short columns, two FRP-type steel-concrete composite columns were subjected to axial compression experiments. The software was used to establish a numerical model to analyze 10 simulated specimens. The load-strain curves of the specimens under static load were plotted. The influence of FRP wall thickness and specimen size on the FRP- Influence of the mechanical properties on the pressure. The results show that with the same specimen size, the larger the wall thickness of the FRP tube, the stronger the bearing capacity of the specimen is and the better the ductility is. With the increase of the specimen size, the increase of the specimen ultimate stress decreases , Resulting in deterioration of the ductility of the specimen.