|Table of Contents|

Aseismic Performance of Circular Concrete Columns Confined with FRP Grids(PDF)

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

Issue:
2007年04期
Page:
39-44
Research Field:
Publishing date:
2007-12-20

Info

Title:
Aseismic Performance of Circular Concrete Columns Confined with FRP Grids
Author(s):
WU Gang1; 2;  WU Zhi-shen1; 2;  LUO Yun-biao1;  JIANG Jian-biao3
1. School of Civil Engineering, Southeast University, Nanjing 210096, Jiangsu, China; 2. International Research Center of Urban Engineering Science, Southeast University, Nanjing 210096, Jiangsu, China; 3. Nanjing Research and Design Center, Beijing Texida Technology Group Corporation, Nanjing 210018, Jiangsu, China
Keywords:
fiber reinforced polymer grid;  confinement;  aseismic performance;  circular concrete column
PACS:
TU378.3
DOI:
-
Abstract:
A series of axial compression load tests ofcircular concrete columns confined with FRP grids were carried out. The equations for calculating the lateral confinement strength, lateral confinement modulus, as well as the stress and strain relation models of circular concrete columns confined with FRP grids were suggested. Based on this, the circular RC columns strengthened with FRP grids were tested under constant axial load and reversed cyclic lateral load. The parameters including the confinement strength and modulus of FRP which the bearing capacity and deformability of specimens for the anchorage types of FRP grids at the bottom were mainly discussed. The results show that FRP grids can significantly improve the strength and ductility of circular concrete columns. The stress and strain relation curves of circular concrete columns confined with FRP grids may be with strain-softening response or not, which is strongly related to the confinement strength and modulus of FRP. The strengthening of FRP grids can obviously improve the aseismic performance including the capacity and ductility ofRC structures.

References:

[1] 吴 刚,吕志涛. FRP约束混凝土圆柱无软化段时的应力-应变关系研究[J].建筑结构学报,2003,24(5):1-9. WU Gang,LU Zhi-tao.Study on the Stress-strain Re-lationship of FRP-confined Concrete Circular ColumnWithout a Strain-softening Response[J].Journal of Building Structures,2003,24(5):1-9.
[2]吴 刚,吕志涛.FRP约束混凝土圆柱有软化段时的应力-应变关系研究[J].土木工程学报,2006,39(11):7-14. WU Gang,LU Zhi-tao.Study on the Stress-strain Relationship of FRP-confined Concrete Circular Column with a Strain-softening Response[J].China Civil Engineering Journal,2006,39(11):7-14.
[3]WU G,LU Z T,WU Z S.Strength and Ductility of Concrete Cylinders Confined with FRP Composites[J].Construction and Building Materials,2006,20(3):134-148.
[4]TENG J G,CHEN J F.FRP:Strengthened RC Structures[M].New York:John Wiley & Sons,2002.
[5]袁旭斌,贺拴海,宋一凡.粘贴纤维布加固RC梁的受弯裂缝计算方法[J].中国公路学报,2006,19(3):54-58. YUAN Xu-bin,HE Shuan-hai,SONG Yi-fan.Calculation Method on Bending Crack in RC Beams Strengthened with FRP[J].China Journal of Highway and Transport,2006,19(3):54-58.
[6]孙晓燕,黄承逵.外贴纤维布加固超载后钢筋混凝土桥梁构件抗弯性能试验[J].中国公路学报,2006,19(4):82-87. SUN Xiao-yan,HUANG Cheng-kui.Test on Flexural Performance of RC Bridge Member After Overload Reinforced with Externally Bonded FRP[J].China Journal of Highway and Transport,2006,19(4):82-87.
[7]吴智深.FRP粘贴结构加固中的几个关键问题和技术[J].建筑结构,2007,37(增1):208-214. WU Zhi-shen.Some Key Issues and Techniques in Strengthening Structure with Bonded FRP Composites[J].Building Structure,2007,37(S1):208-214.
[8]岳清瑞,曹 锐.纤维网格在建筑物结构加固改造中的应用[C]//岳清瑞.中国第二届纤维增强塑料混凝土结构学术交流会会议论文集.北京:清华大学出版社,2002:355-361. YUE Qing-rui,CAO Rui.Application of FRP Grids in Strengthening Buildings[C]//YUE Qing-rui.Proceedings of the 2nd National Conference on Application of FRP in Civil Engineering.Beijing:Tsinghua University Press,2002:355-361.
[9]H14.3,Seismic Design Specifications of Highway Bridges:Seismic Design,Explanation[S].

Memo

Memo:
-
Last Update: 2007-12-20