作　　者： ; ; ; ;

机构地区： 广东工业大学建设学院

出　　处： 《铁道科学与工程学报》 2007年第2期54-58,共5页

摘　　要： 为了模拟混杂纤维布末端剥离破坏过程,建立CFS/GFS混杂加固梁界面有限元模型,与双层CFS加固梁数值分析结果进行对比研究,对不同长度的混杂纤维布加固模型进行计算。结果表明:混杂加固可以有效地控制纤维布末端界面剪应力,而且界面正应力也有所降低,混杂加固方式具有优良的界面混杂效应;随着纤维布有效粘贴长度的减小,胶层端部界面剪应力与正应力成比例增加,增加比例随距离的增加,呈递减趋势。 In order to simulate the entire debonding process, aimed at the simulation of the entire debonding process, mechanical performance of the concrete- to - FRP interface was investigated by the nonlinear FE analysis. Based on above analysis, the interfacial stress levels of CFS - GFS and CFS - CFS were compared. The FE models of RC beam with different lengths of hybrid FRP sheet were investigated. The results show that it is an effective method for hybrid strengthened with CFS - GFS, which can efficiently control interfacial shear stress of FRP meanwhile prevent interfacial normal stress at high stress level. Interfacial shear stress and normal stress of adhesive increase with the increase of shorting length of CFS- GFS.

关 键 词： 界面应力 混杂加固 剥离破坏 非线性有限元

领　　域： [建筑科学]