To study the effect of the fiber reinforced plastic (FRP) pipe wall thickness and specimen size on mechanical properties of FRP-steel-concrete short columns,an axial compression test was carried out on two FRP-section steel-concrete composite short columns.The finite element software was used to establish the numerical model.Ten simulated specimens were analyzed and the load-strain curves of the specimens under static load were drawn.The influence of FRP pipe wall thickness and specimen size on the mechanical properties of FRP-steel-concrete columns subjected to the axial compression was analyzed by using the load-strain curves.The results show that with the same specimen size,the thicker the FRP pipe wall is,the stronger the bearing capacity is,and the better the ductility of the specimen is.As the specimen size increases,the increase extent of ultimate compressive strength decreases,which makes the ductility of the specimen worse.%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.
展开▼
