碳纤维布与钢板复合加固钢筋混凝土梁抗弯承载力的计算分析

碳纤维布与钢板复合加固钢筋混凝土梁是一种新型的加固方法,作者通过12根试件的试验研究碳纤维布和钢板以及两者复合加固钢筋混凝土梁的破坏特征、受力性能和破坏机理。在试验的基础上,本文分析了混凝土强度、纵筋率、CFRP与钢板的加固量等因素对复合加固梁正截面极限承载力的影响,提出了与现行规范相符合的实用承载力计算公式,并与试验结果进行对比。对比结果表明,计算值与试验值吻合较好,本文建议的实用计算公式对实际工程有一定的参考价值。

Calculation analysis of resisting flexural strength of RC beams strengthened by combination of CFRP and steel plate

RC beams strengthened by combination of Carbon Fiber Reinforced Polymer(CFRP) and steel is a new rehabilitation method.The experimental research on the flexural behaviors of 12 reinforced concrete members is conducted.The failure mechanism,bearing capacity and other flexure performance of RC beams which are strengthened by CFRP or steel plate or combination of these two materials have been investigated.Based on the experimental results,the influences of different concrete strength,reinforced ratio,the dosage of CFRP and steel plate on the failure mechanism and the bearing capacity have been investigated,the formula which suits to the present criterion has been brought forward.The comparative results show that the calculation values conform with the experimental results.This formula presented in this paper can be used in practice.