Finite Element Modeling for Debonding of FRP-to-Concrete Interfaces Subjected to Mixed-Mode Loading
Finite Element Modeling for Debonding of FRP-to-Concrete Interfaces Subjected to Mixed-Mode Loading
复制标题
混合模式荷载作用下 FRP 与混凝土界面脱粘的有限元建模
DOI：
10.3390/polym9090438
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发表时间：
2017-09
期刊：
影响因子：
5
通讯作者：
Gao Wan-Yang
中科院分区：
文献类型：
--
作者：
Yu Hui;Bai Yu-Lei;Dai Jian-Guo;Gao Wan-Yang
本文提出了纤维增强聚合物（FRP）-混凝土界面的剥离行为的有限元（FE）模拟受到混合模式的负载，这是通过剥离试验的FRP复合材料外粘到混凝土基板上实现的。一个凝聚力区域模型（CZM）实施到有限元模型来表示FRP-混凝土界面的行为。采用正交各向异性平面应力单元和梁单元两种有限元格式模拟FRP复合板的剥离性能。正交各向异性平面应力元方案，轴承一个明确的物理背景和一个简单的定义的材料性能参数以下的复合材料力学，被认为是上级梁单元方案，因此被用来进行参数研究。剥离角、界面参数（即，研究了粘结区模型的结构、界面损伤起始规律、界面损伤演化规律、Ⅰ型和Ⅱ型组分的耦合作用对FRP-混凝土界面复合型破坏的影响。结果表明，即使剥离角很小，I型组分在FRP-混凝土界面剥离破坏中也起着关键作用。当剥离角增大到一个相对较小的值（例如，4度）和随后的剥离力（即，FRP的剥离强度）显著降低。这种混合的模式I和模式II组件应适当考虑细化FRP加固钢筋混凝土梁的分析和FRP剥离强度设计，其中一个纯粹的模式II界面破坏通常被假定。
This paper presents finite element (FE) modeling of the debonding behavior of fiber reinforced polymer (FRP)-to-concrete interfaces subject to mixed-mode loading, which is realized through a peeling test of FRP composites externally bonded onto a concrete substrate. A cohesive zone model (CZM) is implemented into the FE model to represent the behavior of the FRP-to-concrete interface. Two element schemes (orthotropic plane stress element and beam element) were employed to simulate the behavior of FRP composite plate in the peeling test. The orthotropic plane stress element scheme, bearing a clear physical background and with an easy definition of the material property parameters following the composite mechanics, is found to be superior to the beam element scheme, and thus is utilized to conduct parametric studies. The influences of the peeling angle, the interfacial parameters (i.e., the configuration of the cohesive zone models, the interfacial damage initiation law (DIL), the interfacial damage evolution law (DEL), the coupling of mode-I and mode-II components), on the mixed-mode failure of the FRP-concrete-interface are carefully investigated. The results showed that the mode I component plays a critical role in the debonding failure of FRP-to-concrete interfaces even when the peeling angle is very small. The failure of FRP-to-concrete interface transits promptly from a mode II-dominated one to a mode I-dominated one when the peeling angle increases to a relatively small value (e.g., 4 degree) and subsequently the peeling force (i.e., the debonding strength of FRP) decreases dramatically. Such mixity of the mode I and mode II components should be appropriately considered for refining the analysis of FRP-strengthened RC beams and the FRP debonding strength design, for which a pure mode II interfacial failure was usually assumed.
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影响因子：
4.6
作者：
T. Mohammadi;B. Wan;K. Harries;Michael E. Sweriduk
通讯作者：
T. Mohammadi;B. Wan;K. Harries;Michael E. Sweriduk
影响因子：
5.4
作者：
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通讯作者：
Jinlong Pan;C. Leung
DOI：
--
发表时间：
2002-06
期刊：
--
影响因子：
--
作者：
P. Camanho;C. Dávila
通讯作者：
P. Camanho;C. Dávila
DOI：
--
发表时间：
2005
期刊：
--
影响因子：
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作者：
T. Ueda;J. Dai
通讯作者：
T. Ueda;J. Dai
影响因子：
1.7
作者：
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通讯作者：
L. Lorenzis;B. Miller;A. Nanni