CFRP加固混凝土梁粘结界面应力分析与数值模拟  

INTERFACIAL STRESS ANALYSIS AND NUMERICAL SIMULATION FOR RC BEAMS STRENGTHENED WITH CFRP

作　　者：陈升平[1] 田晓蓉[1] 

机构地区：[1]湖北工业大学土木工程与建筑学院,武汉430068

出　　处：《建筑技术开发》2006年第4期6-8,29,共4页Building Technology Development

基　　金：湖北省教育斤科研项目.编号2003B001

摘　　要：假设混凝土梁轴向变形由弯矩引起，忽略剪力对轴向变形的贡献，用弹性力学方法推导出了CFRP加固混凝土梁的界面正应力和粘结剪应力的解析表达式。并对表达式中各物理量对界面应力的影响进行了分析。结果表明，混凝土与CFRP的弹性模量对界面剪应力有显著影响而粘结剂的弹性模量则影响不大。计算结果与二维平面应力有限元数值结果进行了比较，二者吻合较好。Assuming that the axial deformation of concrete beam is caused only by bending moment, and the influence of shear force is neglected, a analytical formula for the normal stress and shear stress at the interface of concrete and strengthening CFRP Polymer was obtained using the theory of elasticity. The influence of material Parameters on the interfacial bonding stress was discussed. It is shown that the elastic modulus of concrete and CFRP have a significant influence on the interfacial shear stress, while the elastic modulus of has small influence on it. Furthermore, a three-point bending concrete beam strengthened with CFRP was analyzed with two-dimensional plane stress Finite Element Method. It is showed that the obtained theoretical results in this paper agreed well with numerical results.

关 键 词：CFRP 结构加固 粘结层 界面应力 有限元分析 

分 类 号：TU375.1[建筑科学—结构工程]