外包角钢与碳纤维布复合加固钢筋混凝土柱抗剪承载力计算方法

CALCULATION METHOD OF SHEER CAPACITY OF RC COLUMN COMBINATION STRENGTHENED WITH ANGLE STEEL AND CFRP

对7根外包角钢与碳纤维布复合加固混凝土柱进行了抗剪试验研究,分析了复合加固柱在低周反复荷载作用下的抗剪性能,并对影响复合加固柱抗剪性能的因素进行了分析。试验结果表明:碳纤维布与角钢体系能很好地约束混凝土的横向变形,从而显著地提高了柱的斜截面承载力及延性,且较单种材料加固柱具有更优的受力性能。在试验研究的基础上,对复合加固柱的抗剪机理进行分析,提出了其抗剪承载力计算公式,其计算结果与试验结果吻合较好,可为工程应用提供参考。

Seven RC columns strengthened with the combination of angle steel and carbon fiber reinforced polymer （CFRP） under cyclic loads have been conducted to investigate the sheer behaviors, and the influence factors of the sheer capacity of the combination strengthened columns have been analyzed. The results demonstrate that CFRP and angle steel can confine the cross-direction deformation of the concrete. There is a remarkable improvement in ductility and the shear capacity of the columns strengthened with combination of angle steel and CFRP. Furthermore, the jointly strengthened columns excel the separately strengthened columns in the shear capacity and the ductility. Base on the experiment, theoretical analysis is made on the shear mechanics and the calculate method of the shear capacity of the combination strengthened columns is provided. Comparing with experimental results, the calculated results show a good agreement with them and the method can be referenced in engineering application.