| FRP加固混凝土梁受弯剥离破坏的有限元分析 |
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| 引用本文： | 陆新征,滕锦光,叶列平,江见鲸.FRP加固混凝土梁受弯剥离破坏的有限元分析[J].工程力学,2006,23(6):85-93. |
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| 作者姓名： | 陆新征 滕锦光 叶列平 江见鲸 |
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| 作者单位： | 1. 清华大学土木工程系,北京,100084
2. 香港理工大学土木与结构系,红磡,香港 |
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| 基金项目： | 国家自然科学基金;国家高技术研究发展计划(863计划);香港理工大学校科研和教改项目 |
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| 摘 要： | FRP加固钢筋混凝土梁受弯剥离破坏是一种非常常见的破坏形式。首先基于微观尺度有限元分析,对受弯剥离破坏的机理进行了研究,提出了一个受弯剥离的双重剥离破坏准则,以及相应的界面粘结滑移关系,使得受弯剥离可以由基于普通弥散裂缝模型的混凝土单元来加以模拟,并开发出了相应的FRP-混凝土界面单元模型。将该界面单元嵌入通用有限元程序MSC.MARC,对45根受弯剥离破坏的试验梁进行了有限元分析。分析结果表明,提出的计算模型与试验结果吻合良好,可以真实模拟受弯剥离破坏过程。
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| 关 键 词： | 混凝土梁 FRP 剥离 界面粘结 有限元 承载力 |
| 文章编号： | 1000-4750（2006）06-0085-09 |
| 收稿时间： | 2004-08-06 |
| 修稿时间： | 2004-08-062004-11-25 |
FINITE ELEMENT ANALYSIS OF INTERMEDIATE CRACK-INDUCED DEBONDING IN FRP STRENGTHENED RC BEAMS |
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| LU Xin-zheng,TENG Jin-guang,YE Lie-ping,JIANG Jian-jing.FINITE ELEMENT ANALYSIS OF INTERMEDIATE CRACK-INDUCED DEBONDING IN FRP STRENGTHENED RC BEAMS[J].Engineering Mechanics,2006,23(6):85-93. |
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| Authors: | LU Xin-zheng TENG Jin-guang YE Lie-ping JIANG Jian-jing |
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| Affiliation: | 1. Department of Civil Engineering, Tsinghua University, Beijing 100084, PR China; 2. Department of Civil and Structure Engineering, the Hong Kong Polytechnic University, Hong Kong, PR China |
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| Abstract: | A finite element (FE) model to simulate the intermediate crack (IC) debonding of RC beams flexually strengthened with externally bonded FRP plates is presented. A dual debonding criterion is proposed so that IC debonding can be predicted with the common smeared crack approach for concrete. Based on meso-scale FE results, proper bond-slip models for the interface between FRP and concrete are subsequently proposed. The FE model is implemented into the FE package MSC.MARC. Through comparisons with the experimental results of 45 beams, the proposed method is shown to provide accurate predictions of IC debonding failures. |
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| Keywords: | FRP |
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