LIMITATION OF AXIAL-LOAD RATIO OF REINFORCED CONCRETE FRAME COLUMNS STRENGTHENED WITH AFRP SHEETS

Yan Jihong; Yu Liu

doi:10.13204/j.gyjz200706027

Volume 37 Issue 6

Dec. 2014

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Yan Jihong, Yu Liu. LIMITATION OF AXIAL-LOAD RATIO OF REINFORCED CONCRETE FRAME COLUMNS STRENGTHENED WITH AFRP SHEETS[J]. INDUSTRIAL CONSTRUCTION, 2007, 37(6): 104-106. doi: 10.13204/j.gyjz200706027

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LIMITATION OF AXIAL-LOAD RATIO OF REINFORCED CONCRETE FRAME COLUMNS STRENGTHENED WITH AFRP SHEETS

doi: 10.13204/j.gyjz200706027

Yan Jihong¹,
Yu Liu²

1.
1 Asia-Pacific Institute of Construction Science Information Beijing 100044;
2.
2 China State Construction International Company Beijing 101300

Received Date: 2006-10-10
Publish Date: 2007-06-20

Abstract

Abstract

The mechanical properties of reinforced concrete columns strengthened with AFRP(aramid fiber reinforced plastic) sheets are analyzed according to the constitutive law of confined concrete.The axial-load ratio on the cross sections of the reinforced concrete columns strengthened with AFRP sheets under the conditions of the limit destroy is deduced.The influence parameters,such as the longitudinal reinforcement strength,the volume fraction of transverse reinforcing bars and transverse AFRP sheets,to the limitation of axial-load ratio of reinforced concrete columns are investigated.It is stated that the peak stress and the limit strain of concrete confined with transverse reinforcing bars and transverse AFRP sheets are increased evidently and the mechanical properties of concrete are improved.The limit axial-load ratio of reinforced concrete columns strengthened with AFRP sheets is enhanced and increases with the volume fraction of transverse reinforcing bars and transverse AFRP sheets.In the earthquake-resistant design of columns,the placement of longitudinal reinforcement and transverse reinforcement should be considered together in order to increase the ductility of columns.
- AFRP sheets,
- confined concrete,
- constitutive law,
- frame columns,
- axial-load ratio

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References(10)

References

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于清.轴心受压FRP约束混凝土的应力-应变关系研究.工业建筑,2001,31(4):5-8

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[6] 林大炎,王传志.矩形箍筋约束的混凝土应力-应变全曲线研究//清华大学抗震抗爆工程研究室编.钢筋混凝土结构的抗震性能.科学研究报告集第3集,北京:清华大学出版社,1981:19-37

[7] 胡世平.对柱轴压比及含箍量取值的探讨.建筑结构,1988,81(3):17-23

[8] Park R,Paulay T.Reinforced Concrete Structure.New York:John Wileyand Sons,1975

[9] Robert Park,M J Nigel Priestley,Wayne D Gill.Ductility of SquareConfined Concrete Columns.Journal of the Structure Division,ASCE,1982,108(4)

[10] 阿勒米德薄板研究会.阿勒米德纤维薄板补强钢筋混凝土桥墩设计、施工方案.1998

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