【摘要】 基于连续损伤理论,考虑胶层的剪切效应,建立了FRP加固修补混凝土结构的高阶剪切弯曲与面内变形耦合的非线性有限元分析模型。FRP加固修补的缺陷在于失效,失效主要是混凝土的破坏和胶层的失效,纤维布的性能并没有得到充分的发挥,采用将纤维布进行初始拉伸后贴于梁的下表面的方法对梁进行修补,可以改善加固修补效果;将纤维布预先进行3m m和5 m m的拉伸并对加固过程进行了非线性有限元分析模拟,并与试验结果进行了对比,证明了此方法加固的有效性。更多还原

【Abstract】 Based on the continuous damage theory,considering the shear effect,the high-order shearing flexural and in-plane deformation coupling model is built.The disadvantage of the FRP reinforced method is the destroy of concrete and delamination of epoxy resign,the role of FRP plate is not performed totally.Pre-stress the PRP plate bonding to the beam may improve the reinforced effect;tensioned with different length of FRP plates and analyzed with nonlinear FEM method,the reinforced effects are revealed.更多还原