CFRP预应力筋增强RC梁抗弯性能研究  

EXPERIMENTAL STUDY ON FLEXURAL BEHAVIOR OF REINFORCED CONCRETE BEAMS PRE-STRESSED WITH CFRP TENDONS

作　　者：胡建林 王龙威[2] 曹龙呈[2] 孙晓燕[2] 

机构地区：[1]衢州市交通设计有限公司,浙江衢州324002 [2]浙江大学,杭州310058

出　　处：《低温建筑技术》2013年第5期31-33,共3页Low Temperature Architecture Technology

基　　金：国家高技术研究发展项目(863项目)(2007AA04Z437);浙江省交通厅项目(2012H31)

摘　　要：针对国内外配置体外CFRP筋预应力梁式构件的抗弯性能试验数据进行系统的归纳分析,研究了体外CFRP预应力筋增强混凝土桥梁构件的抗弯性能。研究表明:体外CFRP预应力筋混凝土梁的受力过程与体外预应力钢筋混凝土梁颇为相似,能大幅度提高钢筋混凝土梁的承载力,减小梁体变形和开裂程度,张拉预应力筋时梁体是否持荷以及持荷大小对其受力性能影响甚微,CFRP筋的应力增长主要出现在梁体内非预应力钢筋屈服之后。In order to investigate the tlexural behavior of reinforced concrete bridge girder pres tressed with external carbon fiber reinforced polymer （CFRP） tendons, the experimental data of different type of bridge girders prestressed with external tendons were analysized. The investigation results indicate that the flexural behavior of concrete girders with externally prestressed CFRP tendons are similar to that with external steel tendons in many aspects. The external prestressed CFRP tendons can improve bearing capacity and reduce their deformation and crack remarkably. The initial loading state on the girders be fore tendon jacking has no significant effect on the capacity and deflection. The stress improvement of CFRP appeared after the yield of nonprestressing reinforcing steel rebar.

关 键 词：体外预应力 CFRP筋 抗弯性能 试验研究 混凝土梁 

分 类 号：TU377.9[建筑科学—结构工程]