摘要
Nine reinforced concrete (RC) beams strengthened by glass fiber reinforced polymer (GFRP) sheets and three control beams are tested. Four parameters are considered in this experimental program included the concrete strength, the reinforcement ratio, the number of GFRP sheets, and the shear span ratio. It is shown that the application of GFRP sheets can increase the ultimate flexural capacity. The effect of the concrete strength, the reinforcement ratio and the number of GFRP sheets on load capacity is obvious. The shear span ratio can affect the failure mode of RC beams strengthened by GFRP sheets. A theoretical model for flexural behavior of the strengthened RC beam is also developed.
对 9根玻璃纤维布加固的钢筋混凝土梁和 3根对比梁进行了抗弯性能试验研究 .试验中考虑了配筋率、加固量、剪跨比与混凝土强度等级 4个参数 .试验结果表明 ,经玻璃纤维布加固的钢筋混凝土梁抗弯承载力有显著提高 ;混凝土强度、配筋率、加固量对极限荷载有显著影响 ;剪跨比对加固梁的破坏形态有影响 .根据不同的破坏模式 ,提出了抗弯承载力计算方法 .
