摘要
为提高碳纤维布利用程度,改善被加固混凝土受弯构件的受力性能,提出采用粘贴预应力碳纤维布和粘贴钢板复合加固技术.简单介绍了对碳纤维布具有张拉与锚固功能的新型"拉锚一体化"技术和机具,对5根不同加固情况的混凝土梁进行静力加载试验,观察、分析了不同加固情况构件的破坏过程、正截面受弯承载力、荷载-挠度曲线、裂缝开展情况及破坏现象,分析这种复合加固方法的受力特点以及所加固梁的受力性能,提出了具有一定工程实用价值的技术方法与建议.
For improving the utilization level of CFRP and enhancing the mechanical capability of ruggedized concrete structural element in bending, a method of composite strengthening technology of prestressed CFRP and steel plate is put forward, and the stretching and anchor integration technology and the apparatus which can complete the corresponding functions are introduced. A static load test is fulfilled by use of five concrete girders under different strengthening conditions, and the failure process, bearing capacity of positive section , load-deflection curves and cracks＇ developing of concrete girder are observed and analysed in the test. More over, the stressing characteristic of the composite strengthening method and mechanical capability of the strengthened concrete girder is studied. Finally this paper provides the technical method and suggestions which are of practical use to engineering to projects.
出处
《水利水运工程学报》
CSCD
北大核心
2009年第3期14-20,共7页
Hydro-Science and Engineering
基金
山东省教育厅资助项目(J05F03)
关键词
混凝土梁
钢板
复合加固
碳纤维布
预应力
concrete girder
steel plate
composite strengthen
CFRP
prestress
