| 碳纤维与混凝土界面粘结应力计算方法 |
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| 引用本文： | 程永春,李春良,刘寒冰,王波. 碳纤维与混凝土界面粘结应力计算方法[J]. 交通运输工程学报, 2007, 7(2): 46-49,54 |
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| 作者姓名： | 程永春 李春良 刘寒冰 王波 |
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| 作者单位： | 吉林大学交通学院,吉林,长春,130022;吉林大学交通学院,吉林,长春,130022;吉林大学交通学院,吉林,长春,130022;吉林大学交通学院,吉林,长春,130022 |
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| 基金项目： | 交通部联合攻关项目(2003353322100)，吉林省科技攻关项目(20040511) |
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| 摘 要： | 为了确定碳纤维加固混凝土结构承载过程中胶层部位的剪应力分布规律,判别碳纤维与混凝土界面间是否发生剥离破坏,进行了碳纤维布加固混凝土构件的拉伸试验,基于弹性理论,推导了已知力作用下的任意点胶层界面剪应力与碳纤维正应力的计算方法。计算结果表明碳纤维与混凝土界面的剪应力、正应变的分布规律与试验结果相吻合,计算方法有较高的精度,计算得出胶层部位的极限剪切强度为3.96 MPa,在实际工程中,为防止剥离破坏的发生,应确保胶层剪切应力小于此值。
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| 关 键 词： | 桥梁工程 碳纤维 剥离破坏 粘结应力 拉伸试验 |
| 文章编号： | 1671-1637（2007）02-0046-04 |
| 修稿时间： | 2006-12-11 |
Computation method of interfacial stresses between CFRP and concrete |
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| Cheng Yong-chun,Li Chun-liang,Liu Han-bing,Wang Bo. Computation method of interfacial stresses between CFRP and concrete[J]. Journal of Traffic and Transportation Engineering, 2007, 7(2): 46-49,54 |
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| Authors: | Cheng Yong-chun Li Chun-liang Liu Han-bing Wang Bo |
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| Affiliation: | School of Transportation, Jilin University, Changchun 130022, Jilin, China |
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| Abstract: | In order to study the shear stress distribution law of adhesive layer and determine the debonding failure on CFRP(carbon fibre reinforced plastic) and concrete interface in concrete strengthened structure with CFRP,a tensile test with CFRP reinforced concrete specimen was maked out,and a calculation model of arbitrary point interfacial shear stress and strain was put forward based on elasticity theory.Computation result indicates that the computation result of stresses is coincidence with the test result,the model is feasible;the computation value of interfacial ultimate shear strength is 3.96 MPa,so the shear stress should be less than the value in order to prevent the debonding failure. 2 tabs,7 figs,11 refs. |
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| Keywords: | bridge engineering CFRP debonding failure interfacial stresses tensile test |
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