约束条件下CFRP筋单轴抗压性能试验  

Experiment on Uniaxial Compression Behaviors of CFRP Bars in Constraint Condition

作　　者：陈爽[1,2] 关纪文[1,2] 梁淑嘉 陈红梅 CHEN Shuang;GUAN Jiwen;LIANG Shujia;CHEN Hongmei(Guangxi Key Laboratory of New Energy and Building Energy Saving,Guilin University of Technology,Guilin 541004,China;Civil Engineering College,Guilin University of Technology,Guilin 541004,China)

机构地区：[1]桂林理工大学广西建筑新能源与节能重点实验室,广西桂林541004 [2]桂林理工大学土木与建筑工程学院,广西桂林541004

出　　处：《华侨大学学报（自然科学版）》2021年第6期758-763,共6页Journal of Huaqiao University(Natural Science)

基　　金：国家自然科学基金资助项目(51568013);广西高等学校高水平创新团队及卓越学者计划(2017年);广西高校中青年教师科研基础能力提升项目(2021KY0338);广西建筑新能源与节能重点实验室开放基金资助项目(桂科能19-J-21-3)。

摘　　要：对约束条件下3种直径的碳纤维增强复合材料(CFRP)筋进行单轴抗压性能试验,分析筋材长细比、直径对抗压强度、极限应变及抗压弹性模量的影响.结果表明:CFRP筋为典型的脆性材料,其破坏形态主要有剪切破坏、劈裂破坏、压碎破坏、屈曲破坏;直径相同的CFRP筋的抗压强度、极限应变及抗压弹性模量均随长细比的增大而降低;当长细比一定时,CFRP筋的极限应变随直径的增大而降低,但直径的变化对抗压强度和抗压弹性模量的影响甚微.The uniaxial compression behaviors experiment on carbon fiber reinforced plastic(CFRP)bars of three diameters were carried out in constraint condition.The effects of slenderness ratio and diameter on the compressive strength,ultimate strain and compressive elastic modulus were analyzed.The results indicate that CFRP bar is typical brittle material,the failure patterns involve in shear failure,splitting failure,crushing failure and buckling failure.The compressive strength,ultimate strain and compressive elastic modulus of CFRP bars with the same diameter decrease with the increase of slenderness ratios.For the same slenderness ratio,the ultimate strain of CFRP bars decrease with the increase of diameter,but the variation of diameter effects little on the compressive strength and compressive elastic modulus.

关 键 词：碳纤维增强复合材料筋 约束条件 长细比 抗压弹性模量 

分 类 号：TU377.9[建筑科学—结构工程]