New model for post-fatigue behaviour of CFRP to concrete bond interface in single shear
New model for post-fatigue behaviour of CFRP to concrete bond interface in single shear
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DOI：
10.1016/j.compstruct.2016.12.029
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发表时间：
2017-03-01
影响因子：
6.3
通讯作者：
Wang, Yong C.
中科院分区：
文献类型：
--
作者：
Daud, Raid A.;Cunningham, Lee S.;Wang, Yong C.
本文使用 ABAQUS 6.10-1 开发了一个有限元模型来模拟单剪拉拔试验中 CFRP 与混凝土粘结接头的行为。该模型采用粘性表面方法，并将模拟结果与作者的测试结果（单调和后疲劳）进行检查，以证明模型的准确性。使用经过验证的模型进行参数研究，以研究改变粘结长度、FRP 厚度、FRP 类型、混凝土强度和粘结宽度比的影响。然后将结果用于评估用于预测 FRP-混凝土粘合行为的各种现有设计规范方法。疲劳后数值结果表明现有设计规范方法均存在显着差异。基于所做的工作，提出了一个简单且可能更准确的模型，用于预测单剪 CFRP 板的脱粘应变。 (C) 2016 Elsevier Ltd. 保留所有权利。
In this paper, a finite element model using ABAQUS 6.10-1 is developed to simulate the CFRP-to-concrete bonded joint behaviour in single shear pull-out tests. The model adopts the cohesive surface approach and the simulation results are checked against the authors' test results (monotonic and post-fatigue) in order to demonstrate the accuracy of the model. Parametric studies using the validated model were carried out to investigate the effects of varying the bond length, the thickness of FRP, the type of FRP, the concrete strength, and the bond width ratio. The results were then used to assess the various existing design code approaches for predicting the FRP-concrete bond behaviour. The post -fatigue numerical results indicate that the existing design code methods all have significant discrepancies. Based on the work conducted a simple and potentially more accurate model for predicting the debonding strain of CFRP plate in single shear is then presented. (C) 2016 Elsevier Ltd. All rights reserved.