CFRP加固混凝土梁微观界面性能分析  

Mesoscopic analysis on interface properties of concrete beam strengthened with CFRP

作　　者：廖原[1] 郭永昌[2] 莫晓东[2] 

机构地区：[1]广州大学土木工程学院,广东广州510006 [2]广东工业大学建设学院,广东广州510006

出　　处：《混凝土》2008年第5期8-9,12,共3页Concrete

基　　金：广东省科技攻关项目(0711050400013);广东工业大学青年基金(062039)

摘　　要：通过对CFRP加固混凝土梁建立宏、微观有限元界面分析模型,分析了界面端部附近砂浆、胶层及碳纤维布材料在不同载荷下关键应力的分布情况。结果表明在界面端部附近砂浆容易出现裂纹,随着载荷的增大,最终可能产生混凝土剥离破坏。而在界面端部附近胶层剪应力与正应力出现极大值,在该处容易发生面内剥离破坏。Through analysis on the macro-mesoscopic finite element model of RC-beam strengthened with CFRP,presents the distribution of key stresses of mortar matrix, adhesive layer and CFRP around the end of interface under different load.The results show that around the end of interface, mortar matrix is incline to crazing,the crack will develop as the load increasing, and probably lead to concrete debonding in the end, Otherwise,the maximum shear and normal stresses of the adhesive layer appear on the end of the interface, where show a tendency to debonding.

关 键 词：CFRP 界面性能 微观模型 

分 类 号：TU528.572[建筑科学—建筑技术科学]