CAJ | 학술논문

将单丝钢筋与混凝土的界面看作为独立的材料相，分别运用物理实验和数值模拟方法研究了单筋拉拔过程中碳纤维掺量对碳纤维增强混凝土（CFRC，Carbon Fiber Reinforced Concrete）试件粘结滑移性能的影响。物理实验表明，相比于普通混凝土，单筋在碳纤维增强混凝土基体中的拉拔粘结强度随着碳纤维掺量的增加而增强。数值模拟分析结果得到了材料试件的整体力学性能指标，再现构件的拔出破坏演化过程，表明它是一个细观损伤不断萌生、扩展、滑移并最终拔出破坏的渐进过程，单筋拔出损伤演化过程的声发射结果揭示了试件的失稳破裂机理。
장단사강근여혼응토적계면간작위독립적재료상，분별운용물리실험화수치모의방법연구료단근랍발과정중탄섬유참량대탄섬유증강혼응토（CFRC，Carbon Fiber Reinforced Concrete）시건점결활이성능적영향。물리실험표명，상비우보통혼응토，단근재탄섬유증강혼응토기체중적랍발점결강도수착탄섬유참량적증가이증강。수치모의분석결과득도료재료시건적정체역학성능지표，재현구건적발출파배연화과정，표명타시일개세관손상불단맹생、확전、활이병최종발출파배적점진과정，단근발출손상연화과정적성발사결과게시료시건적실은파렬궤리。
The interface between steel and concrete is viewed as an independent material phase to study the effect of fiber dosage including steel fiber on FRC bond-slip performance by the methods of physical experiment and numerical simulation.The experiment result shows that the bonding strength of CFRC improved with the fi-ber dosage increased compared with the common concrete.Meanwhile,the numerical simulation method is a-dopted to obtain the data of mechanical properties and the failure process is reproduced which indicates this is a gradual process of the microscopic damage initiated,propagated and finally the slip appearing.The AE result revealed the damage process and the failure mechanism.