碳纤维布与钢板粘结拉伸承载力计算

为分析碳纤维布与钢板复合加固方法中的碳纤维布与钢板的协调性,进行5组碳纤维布和钢板粘结复合材料试件的单轴拉伸试验,研究碳纤维布与钢板粘结复合材料的破坏特征、受力性能和破坏机理。试验结果表明:复合材料的破坏形式为碳纤维布被拉断或碳纤维布与钢板发生剥离破坏;与对比钢板相比,复合材料的极限承载力提高显著,屈服后的刚度提高也较大,而屈服荷载提高较少;随着碳纤维布层数的增加,复合材料的极限承载力增长较快。在试验研究的基础上,提出复合材料屈服荷载和极限承载力的计算公式,其计算结果与试验结果吻合较好,标准差和变异系数均小于0.035,可供工程参考应用。

Calculation of Tensile Strength of Steel Plate Bonded by Carbon Fiber Reinforced Polymer

To analysis the compatibility of CFRP and steel plate in combination strengthening with CFRP and steel plate,the experimental research on five groups of composite specimens,which consists of steel plate bonded by CFRP in tension,was made.The failure process,performing characteristics and failure mechanism of composite specimens were investigated.The results show that the failure types include break of CFRP and debonding between CFRP and steel plate.And compared to steel plate,the bearing capacity and the rigidity of the composite specimens increase greatly and the yield load increases slightly.The bearing capacity increases sharply with the level number's increase of CFRP.Based on the experiment,the calculation methods are presented to calculate the bearing capacity and the yield load.The comparative results show that the theoretical calculation results agree well with the experimental results.The standard difference and variation coefficient are less than 0.035.The calculation method can provide a reference for engineering application.