碳纤维加固锈蚀混凝土梁短期疲劳性能研究

葛若东; 梁进修; 王磊

doi:10.13204/j.gyjz201206016

碳纤维加固锈蚀混凝土梁短期疲劳性能研究

doi: 10.13204/j.gyjz201206016

1.
1 广西大学土木建筑工程学院南宁 530004;
2.
2 桂林理工大学土木与建筑工程学院广西桂林 541004

基金项目:

广西科技攻关项目(0992001-2)

详细信息

作者简介:
葛若东，女，1961年出生，副教授

计量
- 文章访问数: 103
- HTML全文浏览量: 4
- PDF下载量: 119
- 被引次数: 0
出版历程
- 收稿日期: 2011-11-11
- 刊出日期: 2012-06-20

THE ANALYSIS OF FLEXURAL BEHAVIOR OF CORRODED RC BEAMS STRENGTHENED WITH CFRP UNDER FATIGUE LOADS

1.
1. College of Civil Engineering &Architecture,Guangxi University,Nanning 530004,China;
2.
2. Department of Civil Engineering,Guilin University of Technology,Guilin 541004,China

摘要

摘要: 在不同荷载条件下,对8根钢筋混凝土梁进行试验,研究短期疲劳荷载作用下的变形、应力分布以及短期疲劳荷载作用后的力学指标。试验结果和分析表明:疲劳荷载对锈蚀钢筋混凝土梁的影响较大,明显降低试验梁的极限强度和延性;碳纤维加固后的锈蚀混凝土梁的极限承载力明显提高,且在破坏时具有良好的延性,承载力极限值可以提高22%～47%。碳纤维U形箍对试验梁的性能影响较大,没有粘贴U形箍的碳纤维加固试验梁在后期加载过程中,由于混凝土保护层的突然脱落而发生破坏。采用碳纤维材料加固后的较低锈蚀率的钢筋混凝土梁在经过短期疲劳荷载后依然能够具有良好的力学性能。
- 碳纤维 /
- 疲劳荷载 /
- 钢筋混凝土梁 /
- 锈蚀
Abstract: Eight RC beams including four CFRP strengthened beams were tested after short-term fatigue. Thedistortion, stress distribution, ultimate load of corroded reinforced concrete beams were investigated. Both theexperimental and analytical results indicated that fatigue loading had a significant impact on the performance ofcorroded RC beams; It could reduce the ultimate strength and ductility of the beams substantially. The ultimate loadcarrying capacity of the CFRP-strengthened corroded beams are enhanced evidently and had a preferable ductilityduring damage. The loading capacity of RC beams with CFRP strengthened was in creased by 22% to 47 %. The Uwrap CFRP sheet had an obvious effect on beams, the potential delamination of the concrete cover following steelcorrosion could cause sudden failure of RC beams strengthened with CFRP at later loading stages. Repairing a lowcorrosion rate beams by CFRP still had good mechanical properties after a short-term fatigue loadings.
- carbon fiber /
- fatigue load /
- reinforced concrete beam /
- corrosion

HTML全文

参考文献(11)

Goitseone Malumbela,Pilate Moyo,Mark Alexander.Behaviour ofRC Beams Corroded Under Sustained Service Loads[J].Construction and Building Materials,2009,23:3346-3351.

[2] 宋力,曲福来,赵顺波.锈蚀钢筋与混凝土黏结性能试验研究[J].混凝土,2010(4):74-76.

[3] Sherwood E G,Soudki K A.Rehabilitation of Corrosion DamagedConcrete Beams with CFRP Laminates:A Pilot Study[J].Composites:Part B,2000(31):453-459.

[4] Angst U,Elsener B,Larsen C K,et al.Critical Chloride Contentin Reinforced Concrete-A:Review[J].Cem Concr Res,2009,39(12):1122-1138.

[5] Bertolini L,Carsana M,Redaelli E.Conservation of HistoricalReinforced Concrete Structures Damaged by Carbonation InducedCorrosion by Means of Electrochemical Re-alkalization[J].J CultHerit,2008,9(4):376-385.

[6] 易伟建,孙晓东.锈蚀钢筋混凝土梁疲劳性能试验研究[J].土木工程学报,2007,40(3):6-10.

[7] Huet B,L'hostis V,Santarini G,et al.Steel Corrosion inConcrete Determinist Modeling of Cathodic Reaction as a Functionof Water Saturation Degree[J].Corros Sci,2007,49(4):1918-1932.

[8] Yeong-soo S,Chadon L.Flexural Behavior of Reinforced ConcreteBeams Strengthened with Carbon Fiber-reinforced PolymerLaminates at Different Levels of Sustaining Load[J].ACIStructural Journal,2003,100(2):231-240.

[9] 梁进修.碳纤维加固锈蚀钢筋混凝土梁的疲劳抗弯性能研究[D].桂林:桂林理工大学,2010.

[10] 陈留国,方从启,寇新建,等.受腐蚀钢筋混凝土的粘结性能[J].工业建筑,2004,34(5):15-17.

[11] 范进,董福兴.疲劳荷载下钢筋锈蚀混凝土构件粘结性能试验研究[J].南京理工大学学报:自然科学版,2009(12):734-737.

施引文献

资源附件(0)

访问统计