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结合钢管约束型钢混凝土柱和纤维增强复合材料管约束型钢混凝土柱的优点,提出了复材-钢复合管约束型钢混凝土柱,其中复合管的内管为钢管,外管为复材管。进行了2个方形复材-钢复合管约束型钢混凝土柱试件和1个方形钢管约束型钢混凝土对比试件的滞回性能试验研究,3个试件的剪跨比均为4,试件的主要变化参数为外包玻纤布层数(6层和8层)。试验结果表明:方形复材-钢复合管约束型钢混凝土柱的抗剪承载能力、延性和耗能能力明显优于方形钢管约束型钢混凝土柱的,而且随着外包玻纤布层数的增加,复合管约束型钢混凝土柱的抗剪承载能力、延性和耗能能力逐渐提升;3个试件的破坏模式均为弯曲破坏。
Combined with the advantages of steel tube confined steel reinforced concrete columns and fiber reinforced composite material constrained steel reinforced concrete columns, a composite steel-carbon composite tube confined steel reinforced concrete column is proposed. The inner tube of the composite tube is a steel tube and the outer tube is a composite tube. Hysteresis experiments of two square concrete-steel composite tube confined steel columns and one square steel-tube confined steel concrete were carried out. The shear-span ratios of the three specimens were all 4, The main change parameters for the number of outsourcing fiberglass cloth layer (6 layers and 8 layers). The experimental results show that the shear capacity, ductility and energy dissipation capacity of the square steel-carbon composite confined steel reinforced concrete columns are obviously better than that of the square steel-tube confined steel reinforced concrete columns. With the increase of the number of outsourced fiberglass cloths, The shear capacity, ductility and energy dissipation capacity of the tube-constrained steel reinforced concrete columns gradually increase. The failure modes of the three specimens are all bent and damaged.