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通过12根FRP管型钢混凝土组合短柱进行了轴压试验,研究了含钢率、混凝土强度及FRP管壁厚等对组合柱的受力性能影响。试验结果表明:FRP管型钢混凝土短柱受压破坏区为端部1/3范围处,试件破坏时未出现倒塌现象;组合柱承载力随着试件含钢率的增加而增加,变化幅度较为明显;组合短柱承载力随着FRP管壁厚的增加而增加,壁厚的变化对内部型钢的受力影响较小;随着混凝土强度的增加,试件的承载力增加。
The axial compression tests were carried out on 12 FRP tubular steel-concrete short columns, and the effect of steel ratio, concrete strength and FRP pipe wall thickness on the mechanical behavior of composite columns was studied. The test results show that the collapse area of FRP tubular steel short columns is at the end of 1/3 range, the collapse of the specimen does not occur collapse phenomenon; the bearing capacity of the composite columns increases with the increase of the steel content of the specimen, the change range It is obvious that the bearing capacity of the short columns increases with the increase of the wall thickness of the FRP pipe, and the change of the wall thickness has little effect on the stress of the inner section steel. With the increase of the concrete strength, the bearing capacity of the specimen increases.