预应力AFRP筋混凝土梁受弯性能的试验研究

涂永明; 张继文; 钱洋; 陈杰

doi:10.13204/j.gyjz200904017

预应力AFRP筋混凝土梁受弯性能的试验研究

doi: 10.13204/j.gyjz200904017

1.
1. 东南大学混凝土及预应力混凝土结构教育部重点实验室,南京 210096;
2.
2. 东南大学建筑设训一研究院,南京 210096;
3.
3. 南京市民用建筑设训一研究院,南京 210002

基金项目:

国家自然科学基金重点项目(50238030);国家自然科学基金资助项目(50178018,50808039);江苏省自然科学基金资助项目(BK2008148);教育部博士点基金新教师项目(20070286095)

详细信息

作者简介:
涂永明，男，1978年8月出生，讲师，博士。E-maidtuyongming@seu.edu，cn

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出版历程
- 收稿日期: 2008-06-16
- 刊出日期: 2009-04-20

EXPERIMENTAL STUDY ON THE FLEXURAL BEHAVIOR OF CONCRETE BEAMS PRESTRESSED WITH AFRP TENDONS

1.
1. Key Lab of C&PC Structure of Ministry of Education,Southeast University,Nanjing 210096,China;
2.
2. Architectural Design and Research Institute,Southeast University,Nanjing 210096,China;
3.
3. Nanjing Municipal Institute of Civil Architecture,Nanjing 210002,China

摘要

摘要: 对一组配置芳伦纤维增强塑料AFRP预应力筋的简支梁进行受弯试验，考察AFRP筋配筋率、张拉控制应力、非预应力钢筋配筋率等因素对构件承载能力的影响，分析了开裂荷载、极限荷载、荷载-挠度关系、裂缝发生发展、平截面假定、AFRP筋和普通钢筋的应变发展状况等。
- AFRP筋 /
- 受弯性能 /
- 平截面假定 /
- 极限承载能力 /
- 荷载-挠度曲线
Abstract: A group of simple beams prestressed with AFRP tendons or steel strand have been tested.The effect of several factors,such as the reinforcement ratios of AFRP tendon and steel rebar,the prestressing force,etc,on the load-carrying capacity of the beams is investigated.And the cracking load,the ultimate load,the load-deflection relationship,the crack development,the plane-section assumption,and the strain developments of AFRP tendon and steel reinforcement are discussed.The results demonstrate: the whole mechanical process of the concrete beam prestressed with AFRP tendons can be idealized to the trilinear relationship.The first stage is from loading to cracking,the second to yield of the tension steel,and the third to the ultimate load-carrying capacity.Although the AFRP tendon material has no the yielding plateau,the beams prestressed with AFRP tendons show clear deformation signs before collapsing because of the low elastic modulus of the AFRP material.When the beams collapse,the AFRP tendon will not always reach the ultimate strain value and its strain can be calculated with the plane-section assumption.In addition,the ultimate load-carrying capacity of the beams can be improved by increasing the prestressing force.
- AFRP tendon /
- flexural behavior /
- plane-section assumption /
- ultimate load-carrying capacity /
- load-deflection curve

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参考文献(5)

GB500102002混凝土结构设计规范[S];

[2] 吕志涛,孟少平.现代预应力设计[M].北京:中国建筑工业出版社,1998;

[3] 孟履祥,陶学康,关建光,等.芳纶纤维筋有黏结部分预应力混凝土梁受弯性能研究.土木工程学报[J],2006,39(3):10-18;

[4] Toutanji H,Saafi M.Performance of Concrete Beams Prestressed withAramid Fiber-Reinforced Polymer Tendons[J].Composite Structures,1999,44(1):63-70;

[5] Ferraira AJ M,Camanho P P,Marques A T,et al.Modeling ofConcrete Beams Reinforced with FRP Re-bars[J].CompositeStructures,2001,53(1):107-116.

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