碳纤维布增强钢筋混凝土构件轴心抗拉试验研究

针对钢筋混凝土受拉构件承载力不足的问题,在6根碳纤维布加固钢筋混凝土构件轴拉试验基础上,对配筋率、碳纤维布层数对构件开裂荷载、极限荷载的影响进行了分析,并提出了加固构件的抗拉承载力计算公式.研究表明.粘贴碳纤维布可以有效地提高钢筋混凝土轴拉构件极限承载力,限制裂缝宽度.所提计算公式与试验结果有较好的一致性,可供实际工程设计参考.该研究成果对钢筋混凝土轴心受拉加固具有理论指导意义和工程应用价值.

Experimental research on uniaxial tension strengthening of RC members with externally bonded carbon fiber reinforced plastic sheets

Based on the existing condition that the bearing capacity is insufficient to some aging reinforced concrete(RC) members with uniaxial tension, experiments of 6 RC members are conducted to examine the influences of various factors on the cracking load and ultimate load of the RC members strengthened with externally bonded carbon fiber reinforced plastic(CFRP) sheets. The ratio of reinforcement and layers of CFRP sheets are mainly analyzed, and the formula for calculating the tension capacity of the RC members is put forward. The experimental results show that it is effective for increasing ultimate load and restricting crack width using CFRP sheets to strengthen RC members. The calculation formulas agree with the experimental data, and at the same time, the experimental results can give the reference to the practical projects. The study is instructive and useful in strengthening of RC members with externally bonded CFRP sheets under uniaxial tension.