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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:

28卷

期数:

2011年01期

页码:

76-82

栏目:

出版日期:

2011-03-20

文章信息/Info

Title:

Experiment Research on New Method of Flexural Strengthened with CFRP

作者:

石昌文,何化南,董海,吴智敏

大连理工大学 海岸和近海工程国家重点实验室,辽宁 大连 116024

Author(s):

SHI Chang-wen, HE Hua-nan, DONG Hai, WU Zhi-min

State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China

关键词:

CFRP;  端部锚固;  混凝土;  延性破坏

Keywords:

carbon fiber reinforced polymer;  end anchorage;  concrete;  ductile failure

分类号:

TU374

DOI:

-

文献标志码:

A

摘要:

为了解决外贴碳纤维增强复合材料(CFRP)加固法中加固构件因发生CFRP布剥离而使加固失效的问题,提出了一种新的端部锚固方法,即将CFRP布两端缠绕在铁片上,然后用螺栓把铁片固定于混凝土梁的支座处; 对采用该方法加固的钢筋混凝土梁进行了三点弯曲试验。结果表明:这种端部锚固方法可以延缓CFRP布的剥离,即使CFRP布在跨中剥离仍可与梁共同受力,直至CFRP布拉断,从而有效地提高CFRP的利用率; 此外,加固梁表现出良好的延性破坏特征。

Abstract:

The concrete members strengthened by external bonded carbon fiber reinforced polymer(CFRP)technique tended to fail by CFRP sheet debonding. In order to solve the problem, authors proposed a new end anchorage method, which made the end of CFRP wrapped in a steel plate, and fixed the steel plate on the reinforced concrete(RC)beam near the support pillar with bolts. Three-point bending tests were carried out on RC beams strengthened by the new end anchorage technique. The results show that this approach can delay the debonding of CFRP, which means even if CFRP debonds in the mid-span, the CFRP and RC beam can still be together by force, and improve the CFRP effect accodingly. Furthermore, the strengthened beams have good ductile failure characteristics.

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备注/Memo

备注/Memo:

收稿日期:2010-12-02
基金项目:“十一五”国家科技支撑计划项目(2006BAJ03A03-09); 国家自然科学基金项目(50578025)
作者简介:石昌文(1984-),男,山东菏泽人,工学硕士研究生,E-mail:scw0072010@126.com。

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更新日期/Last Update: 2011-03-20