摘要
为揭示预应力碳纤维布加固钢筋混凝土梁的弯曲变形规律,将层合理论应用到预应力碳纤维布加固的钢筋混凝土梁的结构分析中,建立了集中荷载作用下梁内任意点的挠度、应变及层间应力等计算公式,并对预应力碳纤维布加固的钢筋混凝土梁的力学性能进行了相应的计算;同时利用基于该理论所建立的公式解释了碳纤维布与混凝土的剥离、碳纤维布断裂以及混凝土压碎等试验现象的发生过程。结果表明:计算结果与试验结果相吻合,说明采用该理论分析碳纤维布加固的钢筋混凝土梁是正确的。研究结果为预应力碳纤维布加固混凝土结构的分析提供了新的途径。
In order to study deformation law of bending of the reinforced concrete （RC） beam strengthened with prestressed CFRP sheets, the classical laminate theory was originally put forward. Authors established analytic formulas to calculate deflection, strain and the interface shear stress, and the mechanical properties of RC beam strengthened with prestressed CFRP sheet were calculated. The analytic formulas were used to illustrate the process of the delamination failure, rupture of CFRP sheet and crush of concrete. The results of calculations coincide with the result of tests. The results show that adopted method is available, and these research results provide theoretical basis for analysis of the RC beam strengthened with prestressed CFRP sheet.
出处
《中国公路学报》
EI
CAS
CSCD
北大核心
2009年第1期60-65,共6页
China Journal of Highway and Transport
基金
交通部行业联合科技攻关项目(2003353322100)
教育部高等学校博士学科点专项科研基金项目(20050183037)
