CFRP-混凝土界面黏结性能试验研究及有限元分析

发布时间：2018-03-28 00:15

本文选题：CFRP-混凝土界面　切入点：黏结滑移本构关系　出处：《铁道建筑》2017年12期

【摘要】：采用6组面内双剪试验研究了碳纤维增强复合材料(Carbon Fiber Reinforced Plastic,CFRP)与混凝土界面的黏结行为。为了保证双剪试件两侧界面受力均匀且处于纯剪切状态,对传统的试件制作方法进行了改进并取得了较好的效果。基于试验结果建立了Popovics型界面黏结滑移本构关系,将此本构关系引入有限元模型并对影响界面黏结性能的结构参数进行了分析。结果表明:界面的峰值应力随混凝土强度的增大而增大,随外贴CFRP宽度的增大而减小,但界面的极限剥离荷载呈增加趋势。与常用的2种界面极限剥离荷载计算模型对比表明,本文所提供的剥离荷载计算方法与两者较为接近,能够较好地预测CFRP-混凝土界面的极限剥离荷载。
[Abstract]:The bonding behavior of carbon Fiber Reinforced plastic carbon (CFRP) and concrete interface was studied by in-plane double shear test in 6 groups. In order to ensure that the interface on both sides of the double shear specimen is uniform and in pure shear state, The traditional method of specimen fabrication has been improved and good results have been obtained. Based on the experimental results, the constitutive relationship of Popovics type interfacial adhesion and slip has been established. The constitutive relation is introduced into the finite element model and the structural parameters which affect the bonding performance of the interface are analyzed. The results show that the peak stress of the interface increases with the increase of the strength of concrete, and decreases with the increase of the width of CFRP. But the ultimate peeling load at the interface is increasing. The comparison with the two commonly used calculation models of the ultimate peeling load at the interface shows that the calculation method of the peeling load provided in this paper is close to that of the two models. The ultimate peeling load of CFRP-concrete interface can be predicted well.
【作者单位】：中交第一公路勘察设计研究院有限公司;西南交通大学土木工程学院;
【基金】：国家自然科学基金(51778532) 陕西省科学技术研究发展计划(2013K09-05)
【分类号】：TU528

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