预应力FRP布加固混凝土桥墩的力学性能研究

周长东; 赵锋; 张艾荣; 张蝶

doi:10.13204/j.gyjz200904028

预应力FRP布加固混凝土桥墩的力学性能研究

doi: 10.13204/j.gyjz200904028

1.
北京交通大学土木建筑工程学院,北京 100044

基金项目:

中国博士后科研基金(20040350492);上海市博士后科研资助计划(04R214105);北京交通大学人才基金(2005RC042)资助项目

详细信息

作者简介:
周长东，男，1971年2月出生.副教授.博士。E-mail:chdzhou@bjtu.edu.cn

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- 文章访问数: 68
- HTML全文浏览量: 13
- PDF下载量: 75
- 被引次数: 0
出版历程
- 收稿日期: 2008-04-06
- 刊出日期: 2009-04-20

THE MECHANICAL BEHAVIOR OF CONCRETE PIER STRENGTHENED WITH LATERAL PRE-STRESSED FRP SHEETS

1.
School of Civil Engineering,Beijing Jiaotong University,Beijing 100044,China

摘要

摘要: 通过对FRP(FiberReinforcedPolymer)布加固混凝土桥墩时预应力施加方法的研究和分析，给出了预应力FRP布加固混凝土桥墩的施工方法；以某铁路桥梁中的大尺寸混凝土桥墩为例，比较分析了预应力FRP布加固混凝土桥墩的优点和优势，参照中美两国规范给出了预应力FRP布加固混凝土墩柱的承载力和延性分析方法。结果表明，与未施加预应力的FRP布加固混凝土墩柱相比，采用预应力FRP布加固混凝土墩柱可以有效提高其承载能力和延性；与AFRP布相比，CFRP布更适用于预应力FRP加固工程。
- 预应力FRP布 /
- 锚固方法 /
- 约束混凝土 /
- 力学性能
Abstract: The pre-tensioning methods of FRP sheets applied to strengthen concrete piers are researched and analyzed.Furthermore.A is presented a unique pre-tensioning technique of FRP sheets is presented to strengthen existing concrete piers.Taking a large-sized concrete pier in a railway bridge for example,the advantages of concrete piers strengthened with pre-stressed FRP sheets are compared with no pre-tensioned FRP sheets.Based on Chinese and American codes,the calculation methods of loading capacity and ductility of concrete piers strengthened with pre-stressed FRP sheets are presented.The calculation results show that the loading capacity and ductility of concrete piers can be improved with pre-stressed FRP sheets.Compared with AFRP sheets,CFRP sheet is more suitable as pre-stressed materials to strengthen concrete structures.
- pre-stressed FRP sheet /
- anchorage method /
- confined concrete /
- mechanical behavior

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参考文献(8)

[2] Shahab MEHDIZAD TALEIE,Hasan MOGHADDAM.Experimentaland Analytical Investigation of Square RC Columns Retrofitted withPre-stressed FRP Strips[C]∥8th International Symposiumon FRPReinforcement for Concrete Structures,Greece:2007;

Tetsuo Yamakawa,Mehdi Banazadeh,Shogo Fujikawa.EmergencyRetrofit of Shear Damaged Extremely Short RC Columns Using Pre-tensioned Aramid Fiber Belts[J].Journal of Advanced ConcreteTechnology,2005,3(1):95-106;

[3] Shahab MEHDIZAD TALEIE,Asghar VATANI OSKOUEI.Experimental Investigation of FRP Relaxation and Its Effect on Pre-stressing Techniques[C]∥8th International Symposium on FRPReinforcement for Concrete Structures.Greece:2007;

[4] GB50010-2002混凝土结构设计规范[S];

[5] ACI 318.02.Building Code Requirementsfor Structural Concrete[S].2002;

[6] ACI 440.2R-02.Guide for the Design and Construction of ExternallyBonded FRPSystemsfor Strengthening Concrete Structures[S].2005;

[7] GB50367-2006混凝土结构加固设计规范[S];

[8] 周长东.玻璃纤维聚合物加固混凝土柱的力学性能研究[D].大连:大连理工大学,2003.

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