针对CFS--GFS混杂加固钢筋混凝土梁的一种新型加固方法,通过建立不同材料本构方程,对界面端部附近胶层存在空鼓及混凝土存在裂缝进行了界面非线性有限元数值分析,分别考虑了3种大小的空鼓及5种高度的裂缝对界面性能的影响。研究结果表明胶层空鼓及混凝土裂缝是引起界面端部处粘胶层剥离及混凝土保护层剥离破坏的主要原因。
The RC beams strengthened with Carbon/Glass Fiber Sheet is a new hybrid strengthening method. By establishing the constitutive equations of different material, interracial analysis modes including adhesive hollow imperfection and concrete crack near interface end are calculated by nonlinear finite element method. There are 3 dimension of hollow imperfection and 5 dimensions of concrete cracks to be considered in the paper. The computing results show that hollow imperfection of adhesive layer and concrete crack are main reasons of inducing debonding failure of adhesive layer and concrete cover.