FRP片材加固混凝土梁的计算方法

Calculation Method Study on R C Beams Strengthened with FRP Laminates

对FRP片材加固混凝土梁的破坏形态、计算方法进行了探讨,并对8根FRP加固混凝土梁的极限承载能力进行了对比分析,理论计算结果与实测值吻合较好.研究表明:粘结FRP布加固混凝土梁承载力和加固时的初始应力水平有关,相同条件下,CFRP片材加固混凝土梁承载力最大;GFRP片材加固混凝土梁承载力最小;混杂纤维加固钢筋混凝土梁的承载力介于二者之间.

In the paper, the damage pattern and calculation methods of concrete beams strengthened with FRP laminates were discussed. The ultimate load-bearing capacity of eight R.C beams strengthened with FRP laminates have been tested, the theoretical results is in good agreement with the measured values. Research shows that the bearing capacity of concrete beams strengthened with FRP laminates would related with initial of stress level. Under the same conditions, the bearing capacity of beams strengthened with CFRP laminates would be maximum, the bearing capacity of beams strengthened with GFRP laminates would be minimum, the bearing capacity of beams strengthened with Hybrid Fiber would between the two.