CFRP布混合粘贴形式界面剪切性能试验

发布时间：2018-04-01 05:05

本文选题：CFRP混合粘贴　切入点：面内剪切试验　出处：《哈尔滨工业大学学报》2017年09期

【摘要】：为了研究CFRP布混合粘贴的界面粘结性能,设计了4组自锚式面内双剪试验.根据界面剪应力的发展规律,将CFRP布混合粘贴中碳纤维布由初始受力至破坏的过程划分为3个阶段.试验考虑了碳纤维布不同的粘贴长度因素,分析试验中的破坏形式、破坏过程和界面粘结性能.研究表明CFRP布混合粘贴形式中的钢板锚固件提高了CFRP-混凝土界面的粘结强度,将破坏形态由碳纤维布的剥离破坏转变为碳纤维布的断裂破坏,极大地的提高了碳纤维布材料的强度利用率.碳纤维布在未剥离阶段其界面粘结性能较为稳定,钢板锚固件对碳纤维布的初始剥离影响较小;在碳纤维布持续剥离阶段,钢板锚固件可以延缓碳纤维布的剥离,使得界面粘结强度提高18.02%.
[Abstract]:In order to study the interfacial bond properties of CFRP cloth, four groups of self-anchored in-plane double shear tests were designed. According to the development law of interfacial shear stress, In this paper, the process of carbon fiber cloth from initial force to failure is divided into three stages. The different bonding length factors of carbon fiber cloth are taken into account in the experiment, and the failure forms in the test are analyzed. The research shows that the bond strength of CFRP- concrete interface is improved by the steel plate anchoring in the form of mixed bonding of CFRP cloth, and the failure form is changed from the peeling failure of carbon fiber sheet to the fracture failure of carbon fiber sheet. The strength utilization ratio of carbon fiber cloth is greatly improved. The interfacial bond property of carbon fiber cloth is relatively stable in the non-peeling stage, the influence of steel plate anchoring on the initial exfoliation of carbon fiber cloth is relatively small, and in the continuous peeling stage of carbon fiber cloth, The Anchorage of steel plate can delay the exfoliation of carbon fiber cloth and increase the interfacial bond strength by 18.02.
【作者单位】：东南大学交通学院;南京工程学院;
【基金】：国家自然科学基金(51208097) 交通运输部建设科技项目(2014318J14250)
【分类号】：TU37

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