CG-FRP混杂筋的研制及试验研究  

Development and experimental study of CG-FRP hybrid rebar

作　　者：何政[1] 于明伟[1] 欧进萍[1] 

机构地区：[1]哈尔滨工业大学土木工程学院

出　　处：《哈尔滨工业大学学报》2007年第6期845-848,共4页Journal of Harbin Institute of Technology

基　　金：国家自然科学基金资助项目(50208007)

摘　　要：采用低延伸率的碳纤维和高延伸率的玻璃纤维的层内混杂方式,通过拉挤工艺生产得到了混杂CG-FRP筋.CG-FRP筋的总纤维体积率为65%,碳纤维和玻璃纤维的混杂比例为1:6.标准拉伸力学试验结果表明,CG-FRP混杂筋表现出较为明显的“屈服”现象,平均“屈服”强度和平均极限抗拉强度分别为1507.0MPa和1676.5MPa,后“屈服”阶段的应变量约为弹性阶段应变量的23%.CG-FRP筋的平均弹性模量为88.01GPa,平均泊松比为0.274.研究表明,该混杂筋存在较为明显的混杂效应,协同工作性能较好,筋的弹性模量和极限抗拉强度也得到了显著的提高.A kind of hybrid CG - FRP rebar is developed through pultrusion, in which low - elongation carbon fibers and high - elongation glass fibers are blended in inter - laminar hybrid mode. The volumetric ratio of carbon fibers to glass fibers is chosen as 1：6 and the total fiber volumetric ratio of the CG - FRP rebar is 65%. The results from the standard tension test indicate that CG - FRP rebars exhibit an obvious yielding plateau during the test. The average ＂yielding＂ strength and the average tensile strength of CG - FRP rebars are 1507. OMPa and 1676. 5MPa, respectively. The total amount of ＂post - yielding＂ strain is about 23% of that in the elastic range. The average values of the modulus of elasticity and the Poisson＇ s ratio are 88. 01GPa and O. 274, respectively. The study has revealed that CG - FRP rebars have distinct hybrid effect and good cooperative workability, and that the modulus of elasticity and the tensile strength are also significantly increased.

关 键 词：FRP筋 混杂效应 碳纤维 玻璃纤维 混合法则 

分 类 号：TU528[建筑科学—建筑技术科学]