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| CFRP外贴加固混凝土梁斜截面力学性能及影响因素的试验研究 | |
| 引用本文： | 李伟文,管天成,董必钦,黄伏,隋丽丽.CFRP外贴加固混凝土梁斜截面力学性能及影响因素的试验研究[J].混凝土,2009(4). |
| 作者姓名： | 李伟文 管天成 董必钦 黄伏 隋丽丽 |
| 作者单位： | 1. 深圳大学深圳市土木工程耐久性重点实验室,广东深圳,518060 2. 哈尔滨工业大学深圳研究生院,广东,深圳,518055 3. 深圳市第一建筑工程有限公司,广东深圳,518060 |
| 基金项目： | 国家自然科学基金，深圳市科技计划项目，建设部研究开发项目 |
| 摘 要： | 通过8根碳纤维布加固混凝土粱的抗剪试验,研究了碳纤维布加固方式、加同量、条带间距及粘贴层数对混凝土梁抗剪加固效果的影响.试验结果表明:外贴CFRP条带能有效提高试件的抗剪承载力,其破坏模式主要为CFRP布黏结失效破坏.承载力提高程度与加固方式、加固量、条带间距及枯贴层数密切相关.在受剪过程中,CFRP材料在混凝土梁裂缝发生之后开始发挥作用,而且CFRP条带的应变在斜截面上的分布不均匀. |
| 关 键 词： | 碳纤维增强复合材料(CFRP) 混凝土梁加固 抗剪承载力 力学性能 |
Experimental research on shear capacity and influence factors of RC beam strengthened with externally bonded CFRP sheets |
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| LI Wei-wen,GUAN Tian-cheng,DONG Bi-qin,HUANG Fu,SUI Li-li.Experimental research on shear capacity and influence factors of RC beam strengthened with externally bonded CFRP sheets[J].Concrete,2009(4). | |
| Authors: | LI Wei-wen GUAN Tian-cheng DONG Bi-qin HUANG Fu SUI Li-li |
| Affiliation: | 1.Shenzhen Municipal Key Laboratory of Durability for Civil Engineering Structure;Shenzhen University;Shenzhen 518060;China;2.Shenzhen Graduate School;China Harbin Institute of Technology;Shenzhen 518055;3.Shenzhen First Construction Engineering Co.;Ltd.;China |
| Abstract: | The shear mechanical properties of the RC beams externally bonded by CFRP are studied.Some important factors,bonding mode,spacing and layers of strip are discussed.There are eight simply supported beams strengthened by CFRP in the test.The results indicate that CFRP strips can improve effectively the shear bearing capacity of the RC beams,but the brittleness of the specimens increases also.While the loading is up to the ultimate,the specimens are damaged almost by the CFRP strips debonding.The strain of the... |
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