CFRC抗弯试件的灵敏度  

Sensitivities of carbon fiber reinforced concrete under bending loading

作　　者：张东兴[1] 吴思刚[2] 马冰[1] 赵景海[1] 

机构地区：[1]哈尔滨工业大学材料科学与工程学院,黑龙江哈尔滨150001 [2]哈尔滨工业大学交通科学与工程学院,黑龙江哈尔滨150090

出　　处：《吉林大学学报（工学版）》2004年第4期679-683,共5页Journal of Jilin University:Engineering and Technology Edition

摘　　要：对CFRC抗弯试件进行了试验分析,探讨了不同载荷工况下CFRC抗弯试件的电阻变化规律。结果表明:CFRC抗弯试件上层电阻随载荷的增加先减小后增大,下层电阻随载荷的增加而增大;在重复载荷作用下,CFRC抗弯试件受拉区电阻不断增大,受压区电阻先减小后增大,残余电阻的存在反映了试件内部存在损伤和损伤积累;在交变载荷作用下,碳纤维混凝土试件的电阻随着载荷周期次数的增加而增大,直至破坏;试件电极形式不同,电阻变化规律也不同。Beam test of carbon fiber reinforced concrete(CFRC) was done. vaviation rule of electric resistance of CFRC bending specimen under different loading conditions was discussed. The results show that the upper electric resistance of CFRC bending specimen decreases and then increases as loading became larger, but lower electric resistance decreases gradually. Under repeated loading, the electric resistance of tensile region concrete increases continually, but that of compressive region concrete firstly decreases and then increases. The residual electric resistance reflects inner damage and its accumulation of CFRC specimen. Under alternative loading, the electric resistance of CFRC increases as loading cycle prolongs, until the specimen is damaged. The variation rule of electric resistance depends on the electric pole mode.

关 键 词：材料试验 碳纤维增强混凝土 拉敏性 电阻 

分 类 号：O343[理学—固体力学]