【摘要】 基于FRP加固梁的平衡微分方程和变形协调条件,对粘胶层采用双线性模型来反映其非线性变形特性,建立了加固梁层间应力弹塑性求解方程,并给出了相应的边界条件。文章对一承受均布荷载作用下的加固梁进行了层间应力弹塑性分析,分析结果表明:粘胶层的非线性特性对层间应力的分布影响主要集中在塑性区域,而弹性解高估了层间应力。更多还原

【Abstract】 Based on the basic equilibrium equations and the deformation compatibility relations between the beam and the fiber reinforced plastic(FRP) plate,and with the adoption of the bilinear model of the adhesive layer, the elastoplasticity equation of the interfacial stress of the FRP retrofitted beam is derived, and the corresponding boundary conditions are given. An example of the simply supported FRP reinforced concrete beam under the uniformly distributed load is presented,and a computational analysis is undertaken. The analysis result shows that in the elastic solution,the shear stress in the plastic zone is overestimated and the plastic zone appears near the plate end, while the nonlinear characteristic of the adhesive layer has little influence on the interfacial normal stress.更多还原