| 碳纤维布加固RC梁中粘结性能的非线性有限元分析 |
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| 引用本文： | 黄羽立, 叶列平. 碳纤维布加固RC梁中粘结性能的非线性有限元分析[J]. 工程力学, 2004, 21(2): 54-61. |
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| 作者姓名： | 黄羽立 叶列平 |
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| 作者单位： | 清华大学土木工程系, 北京, 100084 |
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| 基金项目： | 国家自然科学基金资助重点项目(50238030)，国家863计划资助项目(2001AA336010) |
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| 摘 要： | 碳纤维布加固钢筋混凝土(RC)梁中,碳纤维布与梁底混凝土的剥离破坏使碳纤维布的强度不能得到充分发挥.分析碳纤维布与梁底混凝土的粘结应力,是研究碳纤维布加固剥离破坏承载力的基础问题.根据4根碳纤维布加固RC梁的试验研究结果,采用商业有限元程序MSC.Marc建立有限元模型,进行了非线性计算分析.通过分离总粘结应力中的局部粘结应力,得到粘结延伸长度范围内的锚固粘结应力分布,并结合试验数据对其分布规律进行了研究.根据分析和试验结果,引入了“有效锚固粘结长度”和“锚固粘结应力”的概念,给出了极限荷载下锚固粘结应力的计算建议.
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| 关 键 词： | 碳纤维布 结构加固 钢筋混凝土梁 锚固粘结应力 非线性有限元分析 |
| 文章编号： | 1000-4750(2004)02-0054-08 |
| 收稿时间： | 2002-10-21 |
| 修稿时间： | 2003-03-11 |
NONLINEAR FEM ANALYSIS OF BOND BEHAVIOR OF RC BEAMS STRENGTHENED WITH BOTTOM BONDED CFRP SHEETS |
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| HUANG Yu-li, YE Lie-ping. NONLINEAR FEM ANALYSIS OF BOND BEHAVIOR OF RC BEAMS STRENGTHENED WITH BOTTOM BONDED CFRP SHEETS[J]. Engineering Mechanics, 2004, 21(2): 54-61. |
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| Authors: | HUANG Yu-li YE Lie-ping |
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| Affiliation: | Department of Civil Engineering, Tsinghua University, Beijing 100084, China |
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| Abstract: | For RC beams strengthened with bottom bonded CFRP sheets, debonding failure may occur before the CFRP rupture strength is reached. It is believed that the debonding failure is controlled by the bond stresses. Based on experimental research of four RC beams strengthened with bottom bonded CFRP sheets, a finite element method is used to analyze the bond stresses in the interface using MSC.Marc program. By separating the local bond stresses from the total bond shear stresses, the anchorage bond stresses along the extensional bond length are obtained, and the bond stress distribution is investigated. The concepts of |
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| Keywords: | CFRP strengthening RC beam debonding nonlinear finite element analysis |
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